On 4/16/2020 7:50 PM, Jim Wilkins wrote:
"Terry Coombs"Â* wrote in message ...

On 4/16/2020 6:21 PM, Jim Wilkins wrote:
................

Â* My laptop is a T510 lease return , the wife's is a T420 . Both are
running W7 SP1 . Both were factory refurbs in like-new condition when we
got them . Hers still has the DVD tray installed , mine has a 500 Gb hdd
in that slot - I use it to back up all my music and photos plus a bunch
of other stuff I'd rather not have to replace .
----------------------
So you do have a source out there in wherever-you-are.

I recently visited family in the area where "Deliverance" was filmed.
It's nice there but wouldn't support my high tech hobbies. Surprisingly
I didn't see a single solar panel.
------------------------

Â* Yeah , it's this neat little thing on the www called "ebay" . It has
several friends that I like too , like "Amazon"Â* and "Newegg" . Actually
we're pretty sophisticated for as far out in the weeds as we are . There
is a state of the art CNC machine shop in town that does defense dept
contract work , though I know not what they actually make . And certain
parts of this section of the Ozarks is very reminiscent of Deliverance .
Don't recall the title offhand , but there was a movie made about
bootleggers in Stone and Izard counties , they actually had a network of
distributors that covered a large section of northern Arkansas and
southern Missouri . Ah , found it . The movie was Bootleggers , hadÂ*
Jaclyn Smith and Slim Pickens among others and was made in 1974 partly
in and near Mountain View and Calico Rock .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !

On Thursday, April 16, 2020 at 8:14:26 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell" wrote in message
...

On Tuesday, April 14, 2020 at 5:45:44 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell" wrote in message

I know that you like old and cheap hardware, but XP is long out of
support.
=======================================

Anachronism alert! Call the Fashion Police! Anna Wintour is outraged!!
Prepare for Y2K and the Mayan Apocalypse!

My TV antennas and rotor are long out of support too, but they still work
fine and need less maintenance than my neighbor's Xfinity. XP didn't really
need Microsoft's loving hands / greedy fingers to keep it running.

I still use tools made in the 1800's. My HP test equipment is from the 70's
and 80's, my machine tools from the 50's and 60's, and my newest vehicle is
a 2000. All were built to last, which isn't the case with new stuff like my
12VDC powered freezer which is a $200 throw-away.

My CAD, flight simulator and datalogging programs run under XP. I was using
XP for Internet access until a few weeks ago when I finally got posting to
Usenet working on this W7 machine. The only difficulty with XP was the
increasing obsolescence of the last Firefox version. MS didn't completely
abandon it, I recently installed .NET updates.

Datalogging energy use sometimes requires putting laptops where they could
fall such as next to the water heater or hallway thermostat, so I use my
least valuable ones, running XP and W2K. The problem is the attached web of
sensor and power cables.

That antenna and rotor have no software. I've probably repaired over 100 rotors and control boxes over the decades. The early Alliance had real rubber seals that would crack, and fill the housing with corroded pot metal. By the late '60s, they were synthetic which lasted longer.

My point about the cloning software that I use is that I didn't need a separate version for each operating system. I have no problem using older computers in non networked or online applications, but you won't get much use with under 1GB of RAM and modern web pages often refuse to render on older systems.

I currently have over 70 pieces of vintage HP test equipment. over 15 Fluke meters, and over 25 Tektronix equipment including three 2465 and 2465A scopes.

I have 180GB of service manuals, and over 1000 printed manuals, reference and data books. I have repaired 'vintage' equipment since the mid '60s. Some tat was built before WW-II. Still, there are a few newer instruments that save a lot of time and effort on the bench.

This computer is dying. It is one of my last Win 7 computers. I has started the move to Linux. Win 10 is designed for cell phones and tablets with touch screens. I have no desire to use a huge touch screen to write code and track my projects. I have one each, Win 95, 98, ME, Vista and XP to run out of date software to communicate with test equipment. Some calibration software won't run on more than one OS. Some requires DOS or HP systems with Rocky Mountain Basic. I had to restore a dedicated testbed that ran Windows 2.0. The IT department 'upgraded it' without asking. Not only did they wipe the OS, they lost all of the test software. It took a week of piecing everything back together from failing sets of 3.5" floppies. Another difficult restoration was a SMS dual 8" Floppy drive storage system. There were over 100 used, damaged disks that I had to go through to restore our Program guide and five other CG channels at a CATV headend. All because the cheapskate manage wouldn't change a floppy until it failed. Those damaged Shugart drives were over $400 each, but he refused to spend $9 a month for one new floppy.

I was repairing computers with a scope and a hot soldering iron in the early '80s.

I bought a new tablet a few months ago: 10.1" Tablet 8GB RAM + 128GB Flash Android 8.0 Bluetooth 3G WiFi PC Dual Camera GPS for under $60, delivered. I a can install one or two SIMM cards and use it for a cell phone, as well.

On Thursday, April 16, 2020 at 9:53:54 AM UTC-4, Terry Coombs wrote:
On 4/16/2020 7:14 AM, Jim Wilkins wrote:
"Michael Terrell"Â* wrote in message
...

On Tuesday, April 14, 2020 at 5:45:44 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell"Â* wrote in message

Â* I know that you like old and cheap hardware, but XP is long out of
support.
=======================================

Anachronism alert! Call the Fashion Police! Anna Wintour is outraged!!
Prepare for Y2K and the Mayan Apocalypse!

My TV antennas and rotor are long out of support too, but they still
work fine and need less maintenance than my neighbor's Xfinity. XP
didn't really need Microsoft's loving hands / greedy fingers to keep
it running.

I still use tools made in the 1800's. My HP test equipment is from the
70's and 80's, my machine tools from the 50's and 60's, and my newest
vehicle is a 2000. All were built to last, which isn't the case with
new stuff like my 12VDC powered freezer which is a $200 throw-away.

My CAD, flight simulator and datalogging programs run under XP. I was
using XP for Internet access until a few weeks ago when I finally got
posting to Usenet working on this W7 machine. The only difficulty with
XP was the increasing obsolescence of the last Firefox version. MS
didn't completely abandon it, I recently installed .NET updates.

Datalogging energy use sometimes requires putting laptops where they
could fall such as next to the water heater or hallway thermostat, so
I use my least valuable ones, running XP and W2K. The problem is the
attached web of sensor and power cables.



Â* This desktop is my last XP box - and it's dual boot with 7 as an
alternate since it got a new mobo . If the old motherboard had not
started to fail it would still be a straight XP machine . I may try to
resurrect that motherboard , I found 3 slightly bulged electrolytic caps
after the swap , all easily accessible for replacement .

If they are the cluster closest to the CPU, you should replace all of them. The remaining old caps will continue to go up in ESR, and generate internal heat until they fail. I replace a lot of bad caps.

On Thu, 16 Apr 2020 18:44:57 -0700 (PDT), Michael Terrell
wrote:

On Thursday, April 16, 2020 at 8:14:26 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell" wrote in message
...

On Tuesday, April 14, 2020 at 5:45:44 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell" wrote in message

I know that you like old and cheap hardware, but XP is long out of
support.
=======================================

Anachronism alert! Call the Fashion Police! Anna Wintour is outraged!!
Prepare for Y2K and the Mayan Apocalypse!

My TV antennas and rotor are long out of support too, but they still work
fine and need less maintenance than my neighbor's Xfinity. XP didn't really
need Microsoft's loving hands / greedy fingers to keep it running.

I still use tools made in the 1800's. My HP test equipment is from the 70's
and 80's, my machine tools from the 50's and 60's, and my newest vehicle is
a 2000. All were built to last, which isn't the case with new stuff like my
12VDC powered freezer which is a $200 throw-away.

My CAD, flight simulator and datalogging programs run under XP. I was using
XP for Internet access until a few weeks ago when I finally got posting to
Usenet working on this W7 machine. The only difficulty with XP was the
increasing obsolescence of the last Firefox version. MS didn't completely
abandon it, I recently installed .NET updates.

Datalogging energy use sometimes requires putting laptops where they could
fall such as next to the water heater or hallway thermostat, so I use my
least valuable ones, running XP and W2K. The problem is the attached web of
sensor and power cables.

That antenna and rotor have no software. I've probably repaired over 100 rotors and control boxes over the decades. The early Alliance had real rubber seals that would crack, and fill the housing with corroded pot metal. By the late '60s, they were synthetic which lasted longer.

My point about the cloning software that I use is that I didn't need a separate version for each operating system. I have no problem using older computers in non networked or online applications, but you won't get much use with under 1GB of RAM and modern web pages often refuse to render on older systems.

I currently have over 70 pieces of vintage HP test equipment. over 15 Fluke meters, and over 25 Tektronix equipment including three 2465 and 2465A scopes.

I have 180GB of service manuals, and over 1000 printed manuals, reference and data books. I have repaired 'vintage' equipment since the mid '60s. Some tat was built before WW-II. Still, there are a few newer instruments that save a lot of time and effort on the bench.

This computer is dying. It is one of my last Win 7 computers. I has started the move to Linux. Win 10 is designed for cell phones and tablets with touch screens. I have no desire to use a huge touch screen to write code and track my projects.

Windows 10 may be "designed for touch screen and cell phone" but it is
a pretty kick-ass desktop OS as well. I was a XP man. Perhaps the
solidest MS OS ever by the time SP3 had rolled out - then the Win7 and
Win8 abortions came along.
Win10 brought back the reliability and functionality of XP, in my
opinion. It's different than XP, but I actually - after a short time,
found it to be an even better desktop OS.

Unless I had an app that would NOT run on 10, or specialized equipment
that wouldn't talk to 10, there's no way I'd go back to 7 or XP.



I have one each, Win 95, 98, ME, Vista and XP to run out of date software to communicate with test equipment. Some calibration software won't run on more than one OS. Some requires DOS or HP systems with Rocky Mountain Basic. I had to restore a dedicated testbed that ran Windows 2.0. The IT department 'upgraded it' without asking. Not only did they wipe the OS, they lost all of the test software. It took a week of piecing everything back together from failing sets of 3.5" floppies. Another difficult restoration was a SMS dual 8" Floppy drive storage system. There were over 100 used, damaged disks that I had to go through to restore our Program guide and five other CG channels at a CATV headend. All because the cheapskate manage wouldn't change a
floppy until it failed. Those damaged Shugart drives were over $400 each, but he refused to spend $9 a month for one new floppy.

I was repairing computers with a scope and a hot soldering iron in the early '80s.

I bought a new tablet a few months ago: 10.1" Tablet 8GB RAM + 128GB Flash Android 8.0 Bluetooth 3G WiFi PC Dual Camera GPS for under $60, delivered. I a can install one or two SIMM cards and use it for a cell phone, as well.
I was never an apple person - but given a choice of IOS or Android -
- - I bought an older I-Phone (SE) I have an android tablet I don't
use, and got a Win10 convertible tablet for the wife. I'd have stayed
with my old BB10 phone but it doesn't talk to my hearing aids - the
fruit-phone does.

On Thu, 16 Apr 2020 18:49:02 -0700 (PDT), Michael Terrell
wrote:

On Thursday, April 16, 2020 at 9:53:54 AM UTC-4, Terry Coombs wrote:
On 4/16/2020 7:14 AM, Jim Wilkins wrote:
"Michael Terrell"* wrote in message
...

On Tuesday, April 14, 2020 at 5:45:44 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell"* wrote in message

* I know that you like old and cheap hardware, but XP is long out of
support.
=======================================

Anachronism alert! Call the Fashion Police! Anna Wintour is outraged!!
Prepare for Y2K and the Mayan Apocalypse!

My TV antennas and rotor are long out of support too, but they still
work fine and need less maintenance than my neighbor's Xfinity. XP
didn't really need Microsoft's loving hands / greedy fingers to keep
it running.

I still use tools made in the 1800's. My HP test equipment is from the
70's and 80's, my machine tools from the 50's and 60's, and my newest
vehicle is a 2000. All were built to last, which isn't the case with
new stuff like my 12VDC powered freezer which is a $200 throw-away.

My CAD, flight simulator and datalogging programs run under XP. I was
using XP for Internet access until a few weeks ago when I finally got
posting to Usenet working on this W7 machine. The only difficulty with
XP was the increasing obsolescence of the last Firefox version. MS
didn't completely abandon it, I recently installed .NET updates.

Datalogging energy use sometimes requires putting laptops where they
could fall such as next to the water heater or hallway thermostat, so
I use my least valuable ones, running XP and W2K. The problem is the
attached web of sensor and power cables.



* This desktop is my last XP box - and it's dual boot with 7 as an
alternate since it got a new mobo . If the old motherboard had not
started to fail it would still be a straight XP machine . I may try to
resurrect that motherboard , I found 3 slightly bulged electrolytic caps
after the swap , all easily accessible for replacement .

If they are the cluster closest to the CPU, you should replace all of them. The remaining old caps will continue to go up in ESR, and generate internal heat until they fail. I replace a lot of bad caps.
+1
Just be REAL CAREFULL removing the old ones. Easy to damage the vias
on a 6 layer PCB and if you miss a connection down there in the middle
of the board it is virtually impossible to find and fix.

"Michael Terrell" wrote in message
...

On Thursday, April 16, 2020 at 9:53:54 AM UTC-4, Terry Coombs wrote:
On 4/16/2020 7:14 AM, Jim Wilkins wrote:
..................

This desktop is my last XP box - and it's dual boot with 7 as an
alternate since it got a new mobo . If the old motherboard had not
started to fail it would still be a straight XP machine . I may try to
resurrect that motherboard , I found 3 slightly bulged electrolytic caps
after the swap , all easily accessible for replacement .

If they are the cluster closest to the CPU, you should replace all of
them. The remaining old caps will continue to go up in ESR, and generate
internal heat until they fail. I replace a lot of bad caps.

-------------------------------------

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.


--
This email has been checked for viruses by AVG.
https://www.avg.com

"Clare Snyder" wrote in message
...

Windows 10 may be "designed for touch screen and cell phone" but it is
a pretty kick-ass desktop OS as well. I was a XP man. Perhaps the
solidest MS OS ever by the time SP3 had rolled out - then the Win7 and
Win8 abortions came along.
Win10 brought back the reliability and functionality of XP, in my
opinion. It's different than XP, but I actually - after a short time,
found it to be an even better desktop OS.

Unless I had an app that would NOT run on 10, or specialized equipment
that wouldn't talk to 10, there's no way I'd go back to 7 or XP.

-----------------------------------------------------------

My policy is to assign risky tasks to the least valuable computer that can
handle them. My Win 10 laptop goes online for updates but not general
browsing.

Some of the performance improvement over W7 is due to having an i5 CPU
instead of a Core 2 Duo although the clock speeds aren't much different, 2.4
and 2.8 GHz.


--
This email has been checked for viruses by AVG.
https://www.avg.com

On Thursday, April 16, 2020 at 11:40:59 PM UTC-4, Clare wrote:
On Thu, 16 Apr 2020 18:49:02 -0700 (PDT), Michael Terrell wrote:

On Thursday, April 16, 2020 at 9:53:54 AM UTC-4, Terry Coombs wrote:
On 4/16/2020 7:14 AM, Jim Wilkins wrote:
"Michael Terrell"Â* wrote in message
...

On Tuesday, April 14, 2020 at 5:45:44 AM UTC-4, Jim Wilkins wrote:
"Michael Terrell"Â* wrote in message

Â* I know that you like old and cheap hardware, but XP is long out of
support.
=======================================

Anachronism alert! Call the Fashion Police! Anna Wintour is outraged!!
Prepare for Y2K and the Mayan Apocalypse!

My TV antennas and rotor are long out of support too, but they still
work fine and need less maintenance than my neighbor's Xfinity. XP
didn't really need Microsoft's loving hands / greedy fingers to keep
it running.

I still use tools made in the 1800's. My HP test equipment is from the
70's and 80's, my machine tools from the 50's and 60's, and my newest
vehicle is a 2000. All were built to last, which isn't the case with
new stuff like my 12VDC powered freezer which is a $200 throw-away.

My CAD, flight simulator and datalogging programs run under XP. I was
using XP for Internet access until a few weeks ago when I finally got
posting to Usenet working on this W7 machine. The only difficulty with
XP was the increasing obsolescence of the last Firefox version. MS
didn't completely abandon it, I recently installed .NET updates.

Datalogging energy use sometimes requires putting laptops where they
could fall such as next to the water heater or hallway thermostat, so
I use my least valuable ones, running XP and W2K. The problem is the
attached web of sensor and power cables.



Â* This desktop is my last XP box - and it's dual boot with 7 as an
alternate since it got a new mobo . If the old motherboard had not
started to fail it would still be a straight XP machine . I may try to
resurrect that motherboard , I found 3 slightly bulged electrolytic caps
after the swap , all easily accessible for replacement .

If they are the cluster closest to the CPU, you should replace all of them. The remaining old caps will continue to go up in ESR, and generate internal heat until they fail. I replace a lot of bad caps.
+1
Just be REAL CAREFULL removing the old ones. Easy to damage the vias
on a 6 layer PCB and if you miss a connection down there in the middle
of the board it is virtually impossible to find and fix.

I've worked on boards with 18 layers. You need the right rework tools to prevent damage on those. Most people don't use a hot enough desoldering iron, so it weakens the board's hold on the plated through vias. It's no fun having yo scrap a new board that cost over $8,00 to build.

If you use a vacuum desoldering iron and you don't get all of the solder the first try, use some 63/37 solder to replace what you removed. Then try again. You need that solder to transfer the heat to the bottom of the via. Another thing to watch. Often the lead is stuck to the wall of the via after the solder is removed. touch the lead with a hot soldering iron and push i away from the wall. Wait a second o two for the plating to cool, the remove the iron. I as NASA rated for soldering when I worked at Microdyne, and I repaired a lot of the old Commodore C64 computer boards. I had to teach the assemblers at Cincinnati Electronics how to solder the tabs of a small audio transformer to a circuit board at the rework station. The soldering irons weren't hot enough to melt the old solder to remove the transformer after their leads were cleared. I showed them how to use two irons and their wet wicking to remove it, and to heat the tab to bend it away from the plated through slot. Soldering was a union job. I worked in QA, so I had a very angry union steward glaring at me as I worked. They had two boards with that problem, so I looked her in the face and said, "Watch closely, I'm only going to do This one more time!"

She had got in my face my first day there, to inform me that 'No man has ever been able to solder anything!" I told here that I had a business during the daytime, and that I used up to a half pound a mont. Her jaw dropped.

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive.. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.

"Michael Terrell" wrote in message
...

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Those capacitors weren't used in high frequency applications, and they
didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps.
All the ripple is passed to the ground plane as those capacitors filter the
rail. Multiple capacitors in parallel are used for several reasons. They are
smaller, so each one generates less heat. A cluster of them have a mower ESR
than a single capacitor. They can be a lot closer to the CPU to improve
voltage regulations, and reduce the radiated noise....
==============================

On one-off military and FAA digital radio prototypes where GHz-range
performance was more important than production cost I used tantalums for
distributed bulk capacitance and 0.01uF paralleled with 0603 or 0402 1nF MLC
chip caps, typically on the bottom of the board under the device, as close
to the power vias as possible, and sometimes overlapping them which I could
get away with since I soldered everything myself. We based this on network
analyzer sweeps of the capacitors and graphs like these:
https://electronics.stackexchange.co...mic-capacitors

I developed some seemingly impossible stunts like joining solder into small
closed rings, formed into chain mail. One of my tricky bits of prototype
handicraft unintentionally found its way into the production Segway.
Somewhere a Chinese girl with tired fingers is cursing me.


--
This email has been checked for viruses by AVG.
https://www.avg.com

On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell
wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

On Friday, April 17, 2020 at 8:44:25 AM UTC-4, Jim Wilkins wrote:
"Clare Snyder" wrote in message
...

Windows 10 may be "designed for touch screen and cell phone" but it is
a pretty kick-ass desktop OS as well. I was a XP man. Perhaps the
solidest MS OS ever by the time SP3 had rolled out - then the Win7 and
Win8 abortions came along.
Win10 brought back the reliability and functionality of XP, in my
opinion. It's different than XP, but I actually - after a short time,
found it to be an even better desktop OS.

Unless I had an app that would NOT run on 10, or specialized equipment
that wouldn't talk to 10, there's no way I'd go back to 7 or XP.

-----------------------------------------------------------

My policy is to assign risky tasks to the least valuable computer that can
handle them. My Win 10 laptop goes online for updates but not general
browsing.

Some of the performance improvement over W7 is due to having an i5 CPU
instead of a Core 2 Duo although the clock speeds aren't much different, 2.4
and 2.8 GHz.

Most of the time, I'm sitting in front of a high-end i7 machine with 64G of ram running Windows 10. I have VMWare virtual machines with various operating systems for doing tests and developing inter-computer applications. One of the VMs is specifically for doing the more "dangerous" tasks. This PC has a 55" quad definition monitor attached, so all those vm processes have healthy sized windows to run in - a single 55" is equivalent to four 26" screens.

On the list of things to get is an optically isolated USB cable - I ONCE made a nasty mistake and let some smoke out of my laptop while connected to a large machine I was repairing. Somehow, the USB port on the laptop was not 480V compliant ;-
----
As for desoldering, I have a Pace MBT which makes plenty of heat for through holes and an Aoyue hot-air rework station. For particularly stubborn through-hole parts or for multi-sided surface mount parts, Chipquik makes a very low melting point alloy that you can add to the joint making it much easier to melt https://www.chipquik.com/datasheets/SMD16.pdf

On Wednesday, April 1, 2020 at 2:39:20 AM UTC-4, Michael Terrell wrote:
On Monday, March 30, 2020 at 2:03:03 AM UTC-4, John Doe wrote:
I tried a hole saw in my cheap drill press. Works perfectly for
hardwood, but doesn't work for 6061 aluminum. I might try removing some
teeth from a hole saw, see if it cuts a little better without the
chatter. I am familiar with inwards and outwards leaning teeth.

Will I have better luck with a 40mm carbide cutter that has fewer teeth
and maybe better chip removal? The hole diameter must be near perfect,
so I might end up buying more than one (different versions) of those if
it cuts through the material.

Is there a small machine made for cutting shallow holes in metal? I
suppose a good drill press would work, but only if necessary.

I recently purchased DeWalt's small cordless metal cutting bandsaw and
think it's great for cutting most small/narrow aluminum.

I really want to cut that hole.


I've cut them with a fly cutter.

That was my first thought.

On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell
wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products..
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

I recently needed to replace my shop laser printer (really old Brother) and took a chance on a Pantum M7102DW. Though I had never heard of the company, this gives me scanning with autofeeder and double-sided b&w printing for a whopping $119 (delivered) from Amazon. I have absolutely no complaints, and bought another for a customer.

By way of comparison, my first laser printer was an HP Laserjet III which cost $1600.

"rangerssuck" wrote in message
...

Most of the time, I'm sitting in front of a high-end i7 machine with 64G of
ram running Windows 10. I have VMWare virtual machines with various
operating systems for doing tests and developing inter-computer
applications. One of the VMs is specifically for doing the more "dangerous"
tasks. This PC has a 55" quad definition monitor attached, so all those vm
processes have healthy sized windows to run in - a single 55" is equivalent
to four 26" screens.

Nice! I no longer have or need anything nearly that powerful, but this aged
monitor and laptop collection does measure 45" diagonally and is separately
showing live TV news, the 7 day forecast, your post and this reply.


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"rangerssuck" wrote in message
...

I recently needed to replace my shop laser printer (really old Brother) and
took a chance on a Pantum M7102DW. Though I had never heard of the company,
this gives me scanning with autofeeder and double-sided b&w printing for a
whopping $119 (delivered) from Amazon. I have absolutely no complaints, and
bought another for a customer.

By way of comparison, my first laser printer was an HP Laserjet III which
cost $1600.

=================================================

My HP6110 cost nothing, because it didn't work until I cleaned the fogged
front surface mirror with no-residue automotive MAF sensor cleaner. The
repair manual's procedure for that problem is to trash it and buy something
better. My sister unloads such dead office stuff from her clients on me when
they can't easily get rid of it otherwise. Usually it's better than anything
I have, and easily fixed.


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rangerssuck wrote:

Michael Terrell wrote:
John Doe wrote:

I tried a hole saw in my cheap drill press. Works perfectly for
hardwood, but doesn't work for 6061 aluminum. I might try
removing some teeth from a hole saw, see if it cuts a little
better without the chatter. I am familiar with inwards and
outwards leaning teeth.

Will I have better luck with a 40mm carbide cutter that has
fewer teeth and maybe better chip removal? The hole diameter
must be near perfect, so I might end up buying more than one
(different versions) of those if it cuts through the material.

Is there a small machine made for cutting shallow holes in
metal? I suppose a good drill press would work, but only if
necessary.

I recently purchased DeWalt's small cordless metal cutting
bandsaw and think it's great for cutting most small/narrow
aluminum.

I really want to cut that hole.

I've cut them with a fly cutter.

That was my first thought.

Any cheap CNC machines that will cut through 1/4" 6061 aluminum?

Was looking at "generic" (a.k.a. the Chinese "brand")
CNC machines recently. Says they will cut PVC. That is potentially
useful.





--

After looking closely and ordering some flange bearings, that is a
solution to my problem. Using the 17mm inner diameter, the rod/shaft
diameter, instead of the 40mm outer diameter of the bearing that was
attached to the shaft. Apparently 17mm ID is common for flange
bearings. Got some nice ones ($10 each) that also include an Allen key
(x2) to grip the shaft.

On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products..
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

The early HP laser printers were workhorses. I am currently using a Samsung networked printer tat prints on both sides.

I have a junk HP color all in one with a total of 24 pages printed before it stopped feeding paper. What a waste, for whoever bought it new. I picked it up with a pile of junk computers.

"John Doe" wrote in message ...

Any cheap CNC machines that will cut through 1/4" 6061 aluminum?

=====================================

Why CNC? Slide rules, paper drawings and manual machine tools got us to the
Moon.


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On 4/17/2020 8:03 PM, Michael Terrell wrote:
On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

The early HP laser printers were workhorses. I am currently using a Samsung networked printer tat prints on both sides.

I have a junk HP color all in one with a total of 24 pages printed before it stopped feeding paper. What a waste, for whoever bought it new. I picked it up with a pile of junk computers.


You're kind of a pack rat hoarder of worthless **** like Wieber, aren't you?

--
If you're not reading the New York Times, you're not following the news

"Jim Wilkins" wrote:

"John Doe" wrote in message ...

Any cheap CNC machines that will cut through 1/4" 6061 aluminum?

=====================================

Why CNC? Slide rules, paper drawings and manual machine tools got
us to the Moon.

A spaceship got us to the moon.

On Sat, 18 Apr 2020 15:07:06 -0700, Too Many Tools
wrote:

On 4/17/2020 8:03 PM, Michael Terrell wrote:
On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

The early HP laser printers were workhorses. I am currently using a Samsung networked printer tat prints on both sides.

I have a junk HP color all in one with a total of 24 pages printed before it stopped feeding paper. What a waste, for whoever bought it new. I picked it up with a pile of junk computers.


It was too many of those at the office that convinced me there would
be no HP printers here in MY office. Got a brother all-in one at my
wife's desk, and a Canon inkjet and Lexmark color laser at mine. I've
got a Samsung monochrome laser and an old HP Laserjet sitting on the
sidelines. (I bought the Canon new - all the rest are "salvage")

You're kind of a pack rat hoarder of worthless **** like Wieber, aren't you?

On Saturday, April 18, 2020 at 6:06:12 PM UTC-4, Too Many Tools wrote:
On 4/17/2020 8:03 PM, Michael Terrell wrote:
On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

The early HP laser printers were workhorses. I am currently using a Samsung networked printer tat prints on both sides.

I have a junk HP color all in one with a total of 24 pages printed before it stopped feeding paper. What a waste, for whoever bought it new. I picked it up with a pile of junk computers.


You're kind of a pack rat hoarder of worthless **** like Wieber, aren't you?


No, I buy defective test equipment and restore it. I've done that for over 50 years. I started in my mid teens when I couldn't afford new test equipment. TV shops had a phobia about repairing their own equipment so they would pile it up in the back of the shop. They would sell it cheap, or give it away. I repaired as much as I could and used the other for parts.

Now that I'm retired, it is how I spend my time. It has gone from a hobby, to a career, and back to a hobby. It's a better hobby than trolling Usenet.

On Saturday, April 18, 2020 at 9:25:13 PM UTC-4, Clare wrote:

It was too many of those at the office that convinced me there would
be no HP printers here in MY office. Got a brother all-in one at my
wife's desk, and a Canon inkjet and Lexmark color laser at mine. I've
got a Samsung monochrome laser and an old HP Laserjet sitting on the
sidelines. (I bought the Canon new - all the rest are "salvage")

I have a pile of old printers, left from repairing and giving away used computers. Most work, but not on later versions of Windows. The do work with Linux, so they will slowly go away. Bad laser printers are scrapped for the motors, rods and some ICs. Most HP printers are scrapped for hardware when I get them.

On Sat, 18 Apr 2020 21:27:17 -0700 (PDT), Michael Terrell
wrote:

On Saturday, April 18, 2020 at 9:25:13 PM UTC-4, Clare wrote:

It was too many of those at the office that convinced me there would
be no HP printers here in MY office. Got a brother all-in one at my
wife's desk, and a Canon inkjet and Lexmark color laser at mine. I've
got a Samsung monochrome laser and an old HP Laserjet sitting on the
sidelines. (I bought the Canon new - all the rest are "salvage")

I have a pile of old printers, left from repairing and giving away used computers. Most work, but not on later versions of Windows. The do work with Linux, so they will slowly go away. Bad laser printers are scrapped for the motors, rods and some ICs. Most HP printers are scrapped for hardware when I get them.
I don't even bother taking injets apart any more - or late-model HP
lasers. If this HP didn't have a full cartridge and a brand new spare
with it I'd have scrapped it. It was the only "orphan" in a customer's
office and they were standardizing on printers that all used the same
supplies so they put this one in the discard pile they paid me to
dispose of. Along with the Lexmark color laser with one spare toner
cartridge.

On 4/18/2020 9:22 PM, Michael Terrell wrote:
On Saturday, April 18, 2020 at 6:06:12 PM UTC-4, Too Many Tools wrote:
On 4/17/2020 8:03 PM, Michael Terrell wrote:
On Friday, April 17, 2020 at 2:02:06 PM UTC-4, Clare wrote:
On Fri, 17 Apr 2020 07:58:17 -0700 (PDT), Michael Terrell wrote:

On Friday, April 17, 2020 at 7:57:47 AM UTC-4, Jim Wilkins wrote:

Electrolytics didn't used to go bad like that. My stock of beer-can-sized
ones from the 80's which I occasionally reform leak less than 1mA after a
few minutes connected to a (vacuum tube) power supply set to their working
voltage and 15mA.

Those capacitors weren't used in high frequency applications, and they didn't pass as much current. Some CPU ICs operate at 1.8V at up to 100 amps. All the ripple is passed to the ground plane as those capacitors filter the rail. Multiple capacitors in parallel are used for several reasons. They are smaller, so each one generates less heat. A cluster of them have a mower ESR than a single capacitor. They can be a lot closer to the CPU to improve voltage regulations, and reduce the radiated noise.


There was a rumor that the bad ones originated when an Asian manufacturer
stole an intentionally leaked faulty formula.

That was around 1999 and they failed while the computers were under warranty. I had it happen to a two month old Compaq computer. I contacted them. I was told to drop it off at the closest Radio Shack, and it would be serviced at their service center in Orlando. Then they said, "Back up all of your files, because they will reformat and install the operating system. I told them that it was dead, and I couldn't back it up without removing the drive. That would beak the security seal and void the warranty. I told them that I was gong to remove the drive, and never buy another of their products.
Those caps took a long time to work themselves out of the supply
chain and lots of them managed to get through warranty. I had quite a
few where the computers had to go back for warranty where I asked for
permission to pull the drive and noted the permission on the RMA form.

Not buying another Compaq / Pakard Bell / HP computer definitely was
not a BAD decision. Some of their (HP) printers are / were pretty
decent but Canon and Lexmark have sure eaten their lunch over the last
20 years - with help from Brother.

The early HP laser printers were workhorses. I am currently using a Samsung networked printer tat prints on both sides.

I have a junk HP color all in one with a total of 24 pages printed before it stopped feeding paper. What a waste, for whoever bought it new. I picked it up with a pile of junk computers.


You're kind of a pack rat hoarder of worthless **** like Wieber, aren't you?


No, I buy defective test equipment and restore it. I've done that for over 50 years. I started in my mid teens when I couldn't afford new test equipment. TV shops had a phobia about repairing their own equipment so they would pile it up in the back of the shop. They would sell it cheap, or give it away. I repaired as much as I could and used the other for parts.

Now that I'm retired, it is how I spend my time. It has gone from a hobby, to a career, and back to a hobby. It's a better hobby than trolling Usenet.



Really? All Wieber does is troll Usenet, and it seems that's all your
"contribution" [sic] here is.

On Sat, 18 Apr 2020 22:07:35 -0700, Too Many Tools
wrote:

Path: not-for-mail
Subject: Must get newer laptop connected
Newsgroups: rec.crafts.metalworking
References:













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Now that I'm retired, it is how I spend my time. It has gone from a hobby, to a career, and back to a hobby. It's a better hobby than trolling Usenet.



Really? All Wieber does is troll Usenet, and it seems that's all your
"contribution" [sic] here is.


ROFLMAO!!

Poor *******..he is sinking deeper into his mental illness. I hope
they mysteriously find a DNR in your file.

Michael has forgotten more about hardware than you will ever..ever
know.

Gunner, laughing at this buffoon
__

"Journalists are extremely rare and shouldn’t be harmed, but propagandists are everywhere and should be hunted for sport"

Yeah..with no bag limit.




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On Mon, 30 Mar 2020 06:02:59 -0000 (UTC), John Doe
wrote:

I tried a hole saw in my cheap drill press. Works perfectly for
hardwood, but doesn't work for 6061 aluminum. I might try removing some
teeth from a hole saw, see if it cuts a little better without the
chatter. I am familiar with inwards and outwards leaning teeth.

Will I have better luck with a 40mm carbide cutter that has fewer teeth
and maybe better chip removal? The hole diameter must be near perfect,
so I might end up buying more than one (different versions) of those if
it cuts through the material.

Is there a small machine made for cutting shallow holes in metal? I
suppose a good drill press would work, but only if necessary.

I recently purchased DeWalt's small cordless metal cutting bandsaw and
think it's great for cutting most small/narrow aluminum.

I really want to cut that hole.

Thanks.

Take a 1/4-3/8" drill and drill a hole on the kerf of the hole.
Obviously drill it so you dont go outside of the kerf. This will allow
chips to fall through as you cut. This may not seem important..but the
saw WILL start to skate on the tiny metal chips and slow down the
cutting. If you are doing it with a drill motor..as you cut..give the
drill a slight swiveling motion. This will let the chips come out from
under the blade. It WILL speed up the cut. Not a huge amount..but
noticably.

And of course...when cutting with a hole saw..keep the rpms down.
Aluminum really has no top cutting speed..but all other materials do.
Keep your rpms down..even wtih aluminum.

Gunner
__

"Journalists are extremely rare and shouldn’t be harmed, but propagandists are everywhere and should be hunted for sport"

Yeah..with no bag limit.




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On Mon, 30 Mar 2020 15:49:20 -0500, Terry Coombs
wrote:

On 3/30/2020 7:57 AM, Jim Wilkins wrote:
"John Doe" wrote in message
...
I tried a hole saw in my cheap drill press. Works perfectly for
hardwood, but doesn't work for 6061 aluminum. I might try removing
some
teeth from a hole saw, see if it cuts a little better without the
chatter. I am familiar with inwards and outwards leaning teeth.

Will I have better luck with a 40mm carbide cutter that has fewer
teeth
and maybe better chip removal? The hole diameter must be near
perfect,
so I might end up buying more than one (different versions) of those
if
it cuts through the material.

Is there a small machine made for cutting shallow holes in metal? I
suppose a good drill press would work, but only if necessary.

I recently purchased DeWalt's small cordless metal cutting bandsaw
and
think it's great for cutting most small/narrow aluminum.

I really want to cut that hole.

Thanks.
The machine tool one short step up from a drill press is a
"mill/drill". In my limited experience with substandard import machine
tools the floor-stand ones have decent power and rigidity to cut steel
but may lack the accuracy to work to 0.001". The RF-31 mill drill from
MSC that I used was good to no better than 0.005". It looks like the
$1200 Harbor Freight 33686 and might have been adequate for fixing
farm equipment, or a hobbyist with the time to fiddle with shims and
adjustments. The old original US-made "Buffalo" mill-drill was precise
enough to rebore small engine cylinders.

https://www.grizzly.com/milling-machines
https://www.woodstockint.com/product...brand=shop-fox
https://littlemachineshop.com/produc...ory=1387807683

I can't suggest which to buy since I lucked onto a 60 year old
US-made original
http://www.lathes.co.uk/clausing%20vertical/
https://www.ebay.com/i/183960131584?chn=ps
of this:
https://www.grizzly.com/products/Gri...wer-Feed/G0729

I've used the 1990's Enco 100-5100 version of it after cleaning up
some small castings that were factory "finished" to wood stove
tolerance and considered it the minimum I'd accept for making small
machinery with moving parts; shafts and bearings etc. Like my Clausing
it can be disassembled into pieces small and light enough to carry
up/down stairs.

Unfortunately the good old home shop sized US-made machine tools are
now worn, hard to find and priced like new imports.



* I gotta disagree with your opinion of the new machines ... well ,
some of them . My (Wholesale Tools ZX45) RF45 clone is rigid and
accurate enough to machine anything I'm capable of doing . It wasn't
cheap at over 1800 bucks , but after the addition of a 3 axis DRO and X
axis power feed I think it's every bit as capable as a Bridgeport .
Geared head and a dovetail column are the 2 reasons it won out over an
RF31 type mill-drill .

The dovetail column mini mills are decent enough hobby mills. Far far
far better than the round column mills. You did good.

Gunner
__

"Journalists are extremely rare and shouldn’t be harmed, but propagandists are everywhere and should be hunted for sport"

Yeah..with no bag limit.




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On Tue, 31 Mar 2020 10:28:30 -0000 (UTC), John Doe
wrote:

whit3rd wrote:

John Doe wrote:

I tried a hole saw in my cheap drill press. Works perfectly for
hardwood, but doesn't work for 6061 aluminum

It's the per-tooth load that's your problem; the drill press
probably doesn't have a low enough speed for proper high torque on
the hole saw, so the per-tooth cut can't get deep enough. I'd
suspect you're getting fine waste crumbs instead of proper chips.
Lube is important for aluminum in this kind of thing, too.

The 'remove a few teeth' might help, or resharpening the saw (to
make a slightly less agressive cut) might do some good.

Yep, it goes nowhere.

My Dewalt DCD991 (0-450 RPM no-load) might do a better job if I could
get a perfect right angle on it, like in a makeshift drill press.

Planning to buy a DCD130 "mud mixer" (0-600 RPM). That might work well
as most low-end drill presses, if put in a decent press (a thingy to
move it through the work).

Find one of these.... They arent great...but they are better than
most. Turning a drill motor into a drill press does have its uses..on
rare occasions.

I used mine every year or so for odd ****.

https://www.ebay.com/itm/TABLETOP-DR...N/283855129983

These also come in handy. Ive got (2) of the Millwaukees and a
B&D..which is big, heavy and bulky and I seldom use it much..mostly on
plate steel.

https://www.ebay.com/itm/Milwaukee-m...l/142882431025

https://www.ebay.com/itm/MAG-BASE-15...e/263545541077

Mine has a bigger base...a lot bigger..so its a pain to use..hell..its
a pain to find a place to mount it half the time..except on big plate.

__

"Journalists are extremely rare and shouldn’t be harmed, but propagandists are everywhere and should be hunted for sport"

Yeah..with no bag limit.




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