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how to bypass dremel tool internal variable speed control?
On Thu, 04 Oct 2007 21:53:22 GMT, Rich Grise wrote:
On Thu, 04 Oct 2007 06:45:49 +0000, James Sweet wrote: wrote in message Spend a couple of bucks more and get the mini-pneumatic die grinder. Some of the ones I have accept Foredom collets, too. Well you need an air compressor for one of those, a tool relatively few people own. I use a pneumatic die grinder occasionally, but it's louder than my Dremel and it spews out a bit of oil in use. Sounds like you nead an oil trap next to your bench. Good Luck! Rich My $12 die grinder calls for 1-2 drops of oil per use, I've never seen oil come out of it Gerry :-)} London, Canada |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
Call Dremel . They will probably replace it free .
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how to bypass dremel tool internal variable speed control?
According to James Sweet :
wrote in message ups.com... [ ... ] Plus the collets are brass and wear out in no time. Ouch! Good for a one or two time use project, no substitute for a pneumatic die grinder. Bearings suck on them, too. Whadda ya want for $6 anyway? Spend a couple of bucks more and get the mini-pneumatic die grinder. Some of the ones I have accept Foredom collets, too. [ ... ] Well you need an air compressor for one of those, a tool relatively few people own. I certainly do. :-) Hmm ... this is cross-posted to the following newsgroups: sci.electronics.basics sci.electronics.repair rec.crafts.metalworking alt.engineering.electrical Of those, the third (rec.crafts.metalworking) is likely to have a very *high* percentage of readers who own an air compressor. The reply suggesting a pneumatic die grinder probably came from someone in RCM who did not notice the other newsgroups in the cross-posting, so it was reasonable to expect that an air compressor would be present. I use a pneumatic die grinder occasionally, but it's louder than my Dremel and it spews out a bit of oil in use. I forget what the application was for the Dremel (somewhere upthread) so I don't know whether the oil is a problem or not. If working on metal, I would suggest that the oil is probably a benefit, not a problem. If oil is a problem, I would second the suggestion for a Foredom. Note that not only does it have a fairly hefty flexible shaft, but for smaller tools (e;g. what a Dremel would be comfortable driving) there is a handpiece with a short very flexible shaft just before it which makes precise hand control a lot easier. I use an ancient Foredom with the extra flexible handpiece for tuning English concertina reeds, with a Dremel foot pedal for speed control, from a near total stop (needed on the tiny reeds at the upper end of the collection in a typical concertina) to near full speed (for the lowest pitch reeds). Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
how to bypass dremel tool internal variable speed control?
According to James Sweet :
[ ... ] Either way unless you already have the compressor as I did, an electric tool is far cheaper and is not tethered to a big heavy noisy piece of equipment. The big and heavy I would agree with for any compressor adequate to drive a die grinder, but *noisy*? It may be that you have the wrong air compressor. The oilless ones tend to be *very* noisy, but the oil wetted ones, with a belt drive from the motor to the compressor tends to be very quiet in comparison. Yes, there are bursts of chugging from time to time, but no problem from my point of view at least. I would not have one of the oilless ones in my shop. As for heavy -- I just installed a reel fed hose on the ceiling to allow me to reach any place in the shop where I am likely to need air. Someday, I will probably plumb it for drops near each likely place of use. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
how to bypass dremel tool internal variable speed control?
The big and heavy I would agree with for any compressor adequate to drive a die grinder, but *noisy*? It may be that you have the wrong air compressor. The oilless ones tend to be *very* noisy, but the oil wetted ones, with a belt drive from the motor to the compressor tends to be very quiet in comparison. Yes, there are bursts of chugging from time to time, but no problem from my point of view at least. I would not have one of the oilless ones in my shop. Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. I do have an oiled belt drive reciprocating compressor, it's a LOT quieter than the oilless junk but it's still quite loud. Part of the problem is where it sits in the corner, the sound is amplified and echos. |
how to bypass dremel tool internal variable speed control?
James Sweet wrote:
snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Regards, Michael |
how to bypass dremel tool internal variable speed control?
On Thu, 4 Oct 2007 19:18:08 -0400, krw wrote:
In article %AdNi.9074$Hb2.1737@trndny07, says... Well you need an air compressor for one of those, a tool relatively few people own. I use a pneumatic die grinder occasionally, but it's louder than my Dremel and it spews out a bit of oil in use. Sounds like you nead an oil trap next to your bench. Well that would defeat the purpose of the oil in the first place, which is squirted into the tool to lubricate the air motor. They all need a little oil, but most people tend to over-do it and it gets a bit messy. Only needs a drop or two a day, for light duty. (Or they forget to oil them, and the tool dies a quick death.) You can install an inline mist oiler on your workbench outlet that you use the air tools at. But then you have to be REALLY careful not to mix your hoses used with oiled air with your 'clean' hoses, or you'll go to paint something and wreck a paint job getting oil (residue from inside the hoses) into the paint. Perhaps you're referring to the high speed air turbine tools? Either way unless you already have the compressor as I did, an electric tool is far cheaper and is not tethered to a big heavy noisy piece of equipment. For a proper compressor: Big, yes. Noisy, not really, if you buy a proper belt-drive unit where the compressor is turning under 800 RPM or so. The little 3450 RPM direct drive pancake compressors are not enough to run a die grinder for any usable duty time, they make more noise than they do air. I have the "5 HP" (really a 4, but it's enough) Husky (Campbell Hausfeld) 2-stage 80 gallon, and it's not noisy at all when running. The fancier compressors from Ingersoll-Rand and Quincy are even quieter and will run practically forever (even if used a lot), but you pay a heck of a premium for a few Db's. And I have the lumber and a solid-core door to build a little closet around the unit, that will make it virtually silent - just need a small vent fan before I start enclosing it, so it doesn't cook itself if run for long periods... Tethered? I plumbed my house[*] for air. ;-) [*] Places I'd likely use air tools. Don't forget to put an outlet under the eaves or on the backside of a framed "chimney", so the roofers have a convenient place to plug in. Did you ever notice that you can get nice recessed "wall hydrants" for water faucets outdoors, but nobody makes them for air? Or a flush plate-mountable air QD fitting that would look good inside a house? I'm just going to put the air-line drop in the front closet, and paint the pipe when I'm done. -- Bruce -- |
how to bypass dremel tool internal variable speed control?
On Fri, 05 Oct 2007 00:24:43 GMT, "James Sweet"
wrote: The big and heavy I would agree with for any compressor adequate to drive a die grinder, but *noisy*? It may be that you have the wrong air compressor. The oilless ones tend to be *very* noisy, but the oil wetted ones, with a belt drive from the motor to the compressor tends to be very quiet in comparison. Yes, there are bursts of chugging from time to time, but no problem from my point of view at least. I would not have one of the oilless ones in my shop. Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Au contraire, mon frere... ;-) It's still relevant. You have to evict the dust bunnies from inside the gear before you can start fixing it. And what's the easiest way to do it?... I do have an oiled belt drive reciprocating compressor, it's a LOT quieter than the oilless junk but it's still quite loud. Part of the problem is where it sits in the corner, the sound is amplified and echos. Build a sound cover around it that buts up to the wall. Plywood box with acoustic ceiling tiles glued to the inside, and make a labyrinth channel vent on top for air circulation that is also lined with acoustic tile - air goes through, sound bounces off the walls and dies. If you really seal it tight to the wall and floor, put a second labyrinth trap down low with a muffin fan or two for air flow. -- Bruce -- |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. I do it all the time, never had an issue with it. One thing I have learned though is to stay away from optical drives with the air, more than once I've stirred up dust which settled in and ruined the optics. |
how to bypass dremel tool internal variable speed control?
On Fri, 05 Oct 2007 00:24:43 +0000, James Sweet wrote:
The big and heavy I would agree with for any compressor adequate to drive a die grinder, but *noisy*? It may be that you have the wrong air compressor. The oilless ones tend to be *very* noisy, but the oil wetted ones, with a belt drive from the motor to the compressor tends to be very quiet in comparison. Yes, there are bursts of chugging from time to time, but no problem from my point of view at least. I would not have one of the oilless ones in my shop. Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. I do have an oiled belt drive reciprocating compressor, it's a LOT quieter than the oilless junk but it's still quite loud. Part of the problem is where it sits in the corner, the sound is amplified and echos. Get a couple of pieces of egg-crate foam and glue them to the wall behind the noisemaker. That will cut down on the focusing effect. You might spray them with some kind of snow-flock stuff, but the solvents could attack the foam, so check the labels and stuff. As far as needing the oil for your grinder, maybe poke a hole in an old sock and put it around the grinder to catch the spray? Good Luck! Rich |
how to bypass dremel tool internal variable speed control?
On Fri, 5 Oct 2007 17:58:51 -0400, krw wrote:
In article , says... On Thu, 4 Oct 2007 19:18:08 -0400, krw wrote: Don't forget to put an outlet under the eaves or on the backside of a framed "chimney", so the roofers have a convenient place to plug in. Did you ever notice that you can get nice recessed "wall hydrants" for water faucets outdoors, but nobody makes them for air? Because air doesn't freeze, break pipes, and otherwise cause a huge mess? Making the roofer's job easy isn't my intent and I certainly don't want to climb up on the roof to install/service an air connection that I'll never use. OTOH, we're thinking about building a house. If we end up going that way, I was considering an air connection inside every closet (hidden, but accessible). Running the lines in open walls is easy enough. Or a flush plate-mountable air QD fitting that would look good inside a house? I'm just going to put the air-line drop in the front closet, and paint the pipe when I'm done. I don't think they have to look all that good of you just tuck them in closets alongside the door opening. No one will see them there so they don't even need to be painted. I have one in an outside closet (outside the front door, where the entrance panel is), just because it was a convenient place to run a line from the basement to the garage. I have a QC below the brickwork above a basement window, 100' of hose will reach anywhere on the property/house. Gerry :-)} London, Canada |
how to bypass dremel tool internal variable speed control?
On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote:
Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Can't see as it would be worse than canned air Gerry :-)} London, Canada |
how to bypass dremel tool internal variable speed control?
krw wrote:
snip Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Proper ESD controls should always be in place during disassembly and repair; the airstream is really not an issue. Compressed air cleaning is standard practice in computer and electronic equipment maintenance; excess moisture in the airstream is often a problem however when dryers are absent. Regards, Michael |
how to bypass dremel tool internal variable speed control?
| Gerald Miller wrote:
| krw wrote: | Static electricity and electronics don't mix, not to mention breaking | things. Using a compressor to blow out computers may do more harm | than good. | Can't see as it would be worse than canned air Much worse. What creates the static electricity is the relatively long path of the air using a compressor (length of the hose and or pipe). Canned air is very short, and static electricity has hardly any time to be generated. _____________________________________Gerard S. |
how to bypass dremel tool internal variable speed control?
On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote:
In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, computers were routinely cleaned with a type of "dishwasher" with a speacial cleaner, then vacuum baked dry. Today's computers ( and almost all consumer electronis) are cheap enough that replacement is almost as low cost as salvaging. -- Posted via a free Usenet account from http://www.teranews.com |
how to bypass dremel tool internal variable speed control?
On Fri, 5 Oct 2007 21:43:09 -0500, "Gerard Schildberger"
wrote: | Gerald Miller wrote: | krw wrote: | Static electricity and electronics don't mix, not to mention breaking | things. Using a compressor to blow out computers may do more harm | than good. | Can't see as it would be worse than canned air Much worse. What creates the static electricity is the relatively long path of the air using a compressor (length of the hose and or pipe). Canned air is very short, and static electricity has hardly any time to be generated. _____________________________________Gerard S. And if the copper blow pipe is grounded to the chassis? Gerry :-)} London, Canada |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
In article , clare at
snyder.on.ca says... On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote: In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, 130PSI @ 10CFM is not "low pressure". I see all sorts of "standard procedures" go on by monkeys with screwdrivers. computers were routinely cleaned with a type of "dishwasher" with a speacial cleaner, then vacuum baked dry. Routinely? Mine never have been. I know the Tek stuff mentioned earlier is designed not to trap solvents and the gunk they leave behind. Today's computers ( and almost all consumer electronis) are cheap enough that replacement is almost as low cost as salvaging. I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. -- Keith |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
On Sat, 6 Oct 2007 17:52:57 -0400, krw wrote:
In article , clare at snyder.on.ca says... On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote: In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, 130PSI @ 10CFM is not "low pressure". I see all sorts of "standard procedures" go on by monkeys with screwdrivers. computers were routinely cleaned with a type of "dishwasher" with a speacial cleaner, then vacuum baked dry. Routinely? Mine never have been. I know the Tek stuff mentioned earlier is designed not to trap solvents and the gunk they leave behind. Today's computers ( and almost all consumer electronis) are cheap enough that replacement is almost as low cost as salvaging. I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. --- Indeed. I used to put my stuff on the floor in order to gain a little extra desk space, but after seeing the air intakes turn black and get clogged with whatever, they're now on my desktop and breathing at about the same altitude as I am. -- JF |
how to bypass dremel tool internal variable speed control?
krw wrote:
In article , _ says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. -- Keith One of the problems with blowing out electronics with high pressure air is the ultrasonic vibrations that are set up by the air. The vibrations can break the fine junctions on the chip itself. John |
how to bypass dremel tool internal variable speed control?
On Sat, 6 Oct 2007 17:48:17 -0400, krw wrote:
In article PwyNi.22$h33.5@trndny02, says... Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. I do it all the time, never had an issue with it. One thing I have learned though is to stay away from optical drives with the air, more than once I've stirred up dust which settled in and ruined the optics. I've handled CMOS devices with bare hands/no straps too, but the plural of anecdote isn't data. The fact is that moving air will get a charge. If the conditions are right you can zap something. The other problem with the high pressure/volume of a shop compressor is physical damage. Unless you're a pig, such things shouldn't be necessary. Never heard of a pressure regulator? 15psi air won't damage anything, and except in desert conditions moisture is generally more of a problem with shop air than static charge. -- Posted via a free Usenet account from http://www.teranews.com |
how to bypass dremel tool internal variable speed control?
On Sat, 6 Oct 2007 17:52:57 -0400, krw wrote:
In article , clare at snyder.on.ca says... On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote: In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, 130PSI @ 10CFM is not "low pressure". I see all sorts of "standard procedures" go on by monkeys with screwdrivers. Neaver heard of a pressure regulator, I assume? computers were routinely cleaned with a type of "dishwasher" with a speacial cleaner, then vacuum baked dry. Routinely? Mine never have been. I know the Tek stuff mentioned earlier is designed not to trap solvents and the gunk they leave behind. I said in disaster recovery situations. After a flood or fire, for instance. Have you ever had a computer go through a fllood or a fire??? Several customers of mine were in the disaster cleanup business. They ROUTINLELY clead computers and electronics i this way. Today's computers ( and almost all consumer electronis) are cheap enough that replacement is almost as low cost as salvaging. I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. I alwys recommend at least 4 inches off the floor. Again, you SELECTIVELY read. The "dishwasher" was used for cleanup after fire and flood damage. One of the WORST culprits for screwing up electronis today is CIGARETTE SMOKE. -- Posted via a free Usenet account from http://www.teranews.com |
how to bypass dremel tool internal variable speed control?
John wrote:
snip One of the problems with blowing out electronics with high pressure air is the ultrasonic vibrations that are set up by the air. The vibrations can break the fine junctions on the chip itself. Huh? A standard cleaning protocol involved immersion in an ultrasonic freon bath, now replaced by other less-inert solvents; this involved considerably more sonic power than that produced by an air nozzle. Certainly one must exercise care when cleaning around delicate parts such as fine-wire coils without encapsulation, paper parts, etc., but by and large there is little risk in pressurized air cleaning (120 psi) and IMHO the benefits far outweigh any small risks. I've been doing it for far more years than I care to admit with excellent results on industrial, military and consumer electronics. I have also had very good results using high-pressure hot detergent and water for difficult greasy accumulations; the cleaner is much like a dentist's tool or a 'Water Pic' rather than the familiar domestic pressure washer. The key in wet cleaning of electronics is a proper bake-out protocol to insure that parts (such as transformers) with high-potential connections are dry internally to prevent breakdown before applying power. Regards, Michael |
how to bypass dremel tool internal variable speed control?
On Sat, 6 Oct 2007 17:48:17 -0400, krw wrote:
In article PwyNi.22$h33.5@trndny02, says... Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. I do it all the time, never had an issue with it. One thing I have learned though is to stay away from optical drives with the air, more than once I've stirred up dust which settled in and ruined the optics. I've handled CMOS devices with bare hands/no straps too, but the plural of anecdote isn't data. The fact is that moving air will get a charge. If the conditions are right you can zap something. I guess most of us have handled CMOS in this fashion, and I did so myself until made aware that failure rates of such treated equipment was much higher than good procedure. As a test, I directly applied standard 5kv 1/50 impulses to 800 PIV diodes, and found that it was simple to get measurable change in characteristic, but usually took several applications to produce an actually unuseable diode. So the warning is there, that you may not stop the device from working, but it may not be the same as when the manufacturer provided it to you, and certainly I would safely guarantee that any change will not be for an improvement.. Peter Dettmann |
how to bypass dremel tool internal variable speed control?
"krw" wrote in message t... In article , clare at snyder.on.ca says... On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote: In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, 130PSI @ 10CFM is not "low pressure". I see all sorts of "standard procedures" go on by monkeys with screwdrivers. 130 PSI? I usually set mine to around 40 PSI for blowing dust off things. Any decent compressor will have a variable pressure regulator. |
how to bypass dremel tool internal variable speed control?
clare, at, snyder.on.ca wrote:
Never heard of a pressure regulator? 15psi air won't damage anything, and except in desert conditions moisture is generally more of a problem with shop air than static charge. I suppose you've never heard of a special nozzle made for electronics. It has a radioactive isotope to prevent static problems. Microdyne leased two of them for the production floor, because the manufacturer didn't sell them. Central Florida isn't a desert, but I suppose you've never seen a commercial air compressor with a dryer? -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
how to bypass dremel tool internal variable speed control?
krw wrote:
I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. If you install a bigger fan it will either remove all of the cat's hair, or suck it into the computer. ;-) -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
how to bypass dremel tool internal variable speed control?
James Sweet wrote:
130 PSI? I usually set mine to around 40 PSI for blowing dust off things. Any decent compressor will have a variable pressure regulator. I prefer to put a mini regulator and gauge by whatever tool I'm using, to get a constant pressure. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
how to bypass dremel tool internal variable speed control?
In article ,
Michael A. Terrell wrote: krw wrote: I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. If you install a bigger fan it will either remove all of the cat's hair, or suck it into the computer. ;-) I don't think there's room for my cat inside my computer ;-) -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
how to bypass dremel tool internal variable speed control?
charles wrote:
In article , Michael A. Terrell wrote: krw wrote: I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. If you install a bigger fan it will either remove all of the cat's hair, or suck it into the computer. ;-) I don't think there's room for my cat inside my computer ;-) One of my tower cases HAD to sit on the desk, because it was taller than the desk. It had 12 drive bays, and room for several cats. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
In article , clare at
snyder.on.ca says... On Sat, 6 Oct 2007 17:52:57 -0400, krw wrote: In article , clare at snyder.on.ca says... On Fri, 5 Oct 2007 17:58:50 -0400, krw wrote: In article , says... James Sweet wrote: snip Ah crap, I didn't notice the crossposting until now, I won't keep this thread going beyond this, I thought I was only replying to sci.electronics.repair which is something that rarely requires air. Not to sound trollish, but one of my pet peeves is the lack of compressed air capability in electronics (and formerly computer) repair shops; cleanliness is next to godliness in equipment maintenance and for shops not to at least use compressed air to clean dirty customer gear is to me unconscionable (when needed I would expect hot high-pressure non-ionic detergent cleaning as well). Static electricity and electronics don't mix, not to mention breaking things. Using a compressor to blow out computers may do more harm than good. Our regional Tektronix repair depot _routinely_ hot-washed and baked instruments that were brought in for repair. Quite a different thing, though I wouldn't do this either, unless the equipment was made for it. Low pressure air is standard procedure for cleaning out computers that are in normal dusty condition, and after fires and disasters, 130PSI @ 10CFM is not "low pressure". I see all sorts of "standard procedures" go on by monkeys with screwdrivers. Neaver heard of a pressure regulator, I assume? I guess they haven't. Static *is* still a problem. computers were routinely cleaned with a type of "dishwasher" with a speacial cleaner, then vacuum baked dry. Routinely? Mine never have been. I know the Tek stuff mentioned earlier is designed not to trap solvents and the gunk they leave behind. I said in disaster recovery situations. After a flood or fire, for instance. Have you ever had a computer go through a fllood or a fire??? No, but if it ever were I'd simply salvage the data off the disk and replace the hardware. I can't believe anyone would spend real money to salvage *cheap* hardware, particularly an insurance company. Several customers of mine were in the disaster cleanup business. They ROUTINLELY clead computers and electronics i this way. Not that I don't believe you, but... Today's computers ( and almost all consumer electronis) are cheap enough that replacement is almost as low cost as salvaging. I'll agree there. If it's going to get that dirty in a couple of years, perhaps one ought to clean house a little more often. OTOH, I learned not to put towers directly on the floor. They make good cat-hair vacuums. I alwys recommend at least 4 inches off the floor. Again, you SELECTIVELY read. The "dishwasher" was used for cleanup after fire and flood damage. One of the WORST culprits for screwing up electronis today is CIGARETTE SMOKE. Shouldn't be too bad today. Twenty years ago, when people smoked in office buildings... Even so, hardware is cheap. Labor isn't. -- Keith |
how to bypass dremel tool internal variable speed control?
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how to bypass dremel tool internal variable speed control?
In article ,
krw wrote: [*] It seems seems to be a fundamental law of the universe that all horizontal surfaces will be full of stuff. Thank god for gravity, or the vertical surfaces would be equally cluttered. |
how to bypass dremel tool internal variable speed control?
msg wrote: John wrote: snip One of the problems with blowing out electronics with high pressure air is the ultrasonic vibrations that are set up by the air. The vibrations can break the fine junctions on the chip itself. Huh? A standard cleaning protocol involved immersion in an ultrasonic freon bath, now replaced by other less-inert solvents; this involved considerably more sonic power than that produced by an air nozzle. Certainly one must exercise care when cleaning around delicate parts such as fine-wire coils without encapsulation, paper parts, etc., but by and large there is little risk in pressurized air cleaning (120 psi) and IMHO the benefits far outweigh any small risks. I've been doing it for far more years than I care to admit with excellent results on industrial, military and consumer electronics. I have also had very good results using high-pressure hot detergent and water for difficult greasy accumulations; the cleaner is much like a dentist's tool or a 'Water Pic' rather than the familiar domestic pressure washer. The key in wet cleaning of electronics is a proper bake-out protocol to insure that parts (such as transformers) with high-potential connections are dry internally to prevent breakdown before applying power. Regards, Michael On older circuit boards when ic's were first introduced it was not recommended to use high pressure air on the boards. One of the main failure points on early chips was the bonding of the leads to the chip. This has since been solved but I still remember having boards fail after they were blown off with high pressure air. John |
how to bypass dremel tool internal variable speed control?
john wrote:
snip On older circuit boards when ic's were first introduced it was not recommended to use high pressure air on the boards. One of the main failure points on early chips was the bonding of the leads to the chip. This has since been solved but I still remember having boards fail after they were blown off with high pressure air. Interesting. What package types were susceptible to this (or did it matter)? Metal can TO-x ICs seemed to be the most reliable (RTL, HLL, some DTL, etc.) but I found a lot of early ceramic packages suffered from bad seals and permitted fungi to enter and grow inside (this in equipment that had never been wet, just from operating environmental conditions). These parts seemed also to lack proper passivation internally. Regards, Michael |
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