My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

On 6/11/2013 6:35 PM, Karl Townsend wrote:
... a real nice monster wench....

Kinky

"Bob Engelhardt" wrote in message
...
On 6/11/2013 6:35 PM, Karl Townsend wrote:
... a real nice monster wench....

Kinky

Chuckle!

Yeah, I was thinking the same thing! ;-)

Harold

On Thu, 13 Jun 2013 05:48:14 GMT, "Harold & Susan Vordos"
wrote:


"Bob Engelhardt" wrote in message
...
On 6/11/2013 6:35 PM, Karl Townsend wrote:
... a real nice monster wench....

Kinky

Chuckle!

Yeah, I was thinking the same thing! ;-)

How much worse is that in the morning than waking up to Coyote Ugly?
I've only met one double bagger in my life. (That's where you put a
bag over her head when taking her to bed, and putting another one on
yourself, JUST in case hers comes off.)

--
I have never understood why it is "greed" to want to keep the money you
have earned, but it is not greed to want take someone else's money.
--Thomas Sowell

"Larry Jaques" wrote in message
...
On Thu, 13 Jun 2013 05:48:14 GMT, "Harold & Susan Vordos"
wrote:


"Bob Engelhardt" wrote in message
...
On 6/11/2013 6:35 PM, Karl Townsend wrote:
... a real nice monster wench....

Kinky

Chuckle!

Yeah, I was thinking the same thing! ;-)

How much worse is that in the morning than waking up to Coyote Ugly?
I've only met one double bagger in my life. (That's where you put a
bag over her head when taking her to bed, and putting another one on
yourself, JUST in case hers comes off.)


I tried to avoid the urge to gnaw off an arm after waking up in the
morning---did that by being selective when I was between wives. #2, the
current Mrs., has been a real gem. A definite keeper. 36 years this
month.

Harold

On Fri, 14 Jun 2013 06:25:18 GMT, "Harold & Susan Vordos"
wrote:


"Larry Jaques" wrote in message
.. .
On Thu, 13 Jun 2013 05:48:14 GMT, "Harold & Susan Vordos"
wrote:


"Bob Engelhardt" wrote in message
...
On 6/11/2013 6:35 PM, Karl Townsend wrote:
... a real nice monster wench....

Kinky

Chuckle!

Yeah, I was thinking the same thing! ;-)

How much worse is that in the morning than waking up to Coyote Ugly?
I've only met one double bagger in my life. (That's where you put a
bag over her head when taking her to bed, and putting another one on
yourself, JUST in case hers comes off.)


I tried to avoid the urge to gnaw off an arm after waking up in the
morning---did that by being selective when I was between wives.

Slow learner, wot?



#2, the
current Mrs., has been a real gem. A definite keeper. 36 years this
month.

Congrats, 'Arry.

--
I have never understood why it is "greed" to want to keep the money you
have earned, but it is not greed to want take someone else's money.
--Thomas Sowell

On 2013-06-11, Karl Townsend wrote:
My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I am extremely envious!

Ignoramus5948 fired this volley in
:

I am extremely envious!

You would only be if you were re-selling the machine.

He'll LOVE it until he gets familiar with that old BP conversion head. I
used to have one similar -- a Cinci#2 with the same head.

then... eh... BTDT. I have a number of 'wasted' tools with built-on MT2
tapers I need to shuck.


Lloyd

On Tue, 11 Jun 2013 18:36:04 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

Ignoramus5948 fired this volley in
:

I am extremely envious!

You would only be if you were re-selling the machine.

He'll LOVE it until he gets familiar with that old BP conversion head. I
used to have one similar -- a Cinci#2 with the same head.

then... eh... BTDT. I have a number of 'wasted' tools with built-on MT2
tapers I need to shuck.


Lloyd

"The Kid" and I agree, a BP is just a glorified drill press. But they
sure are handy for a quick slot or something minor. He won't expect
much more out of this unit. He did just con me out a complete set of
R8 tooling for it.

His work will be selling off a low hours Haas VF2 with rotary table
and touch probe this fall. That will be his goto CNC machine.

Karl Townsend fired this volley in
:

He won't expect
much more out of this unit. He did just con me out a complete set of
R8 tooling for it.


A BP conversion head with R8 spindle taper?? REALLY?

Hmmm... I wonder if someone re-worked it (somehow... I don't see how
there's enough meat in that spindle to do that).

Lloyd

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote:

Karl Townsend fired this volley in
:

He won't expect
much more out of this unit. He did just con me out a complete set of
R8 tooling for it.


A BP conversion head with R8 spindle taper?? REALLY?

Hmmm... I wonder if someone re-worked it (somehow... I don't see how
there's enough meat in that spindle to do that).

Huh? It's a 1J head, most were R8, like mine. You could also get
quick-switch and NMTB30. Maybe you are thinking of the M head,
which had a MUCH smaller quill and spindle, and B&S #7 and MT3
were common tapers, also Bridgeport's own C taper. That certainly
could not be made to take R8.

Jon

Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.

On Tue, 11 Jun 2013 19:08:11 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.

One is for the southbend lathe.

Karl Townsend wrote:

On Tue, 11 Jun 2013 19:08:11 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.

One is for the southbend lathe.

Going to use both at the same time?

On Tue, 11 Jun 2013 19:19:31 -0500, "Pete C."
wrote:


Karl Townsend wrote:

On Tue, 11 Jun 2013 19:08:11 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.

One is for the southbend lathe.

Going to use both at the same time?

Don't give him any ideas. I'll be wiring these up with For/Off/Rev
switch and a speed pot.

Karl

On Tue, 11 Jun 2013 19:08:11 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.


The problem is turning them on and off. NEVER switch the output line
from a VFD..ever. Only switch the Input (power) TO the VFD

Doing it wrong lets out the magic smoke.


--
"You guess the truth hurts?

Really?

"Hurt" aint the word.

For Liberals, the truth is like salt to a slug.
Sunlight to a vampire.
Raid® to a cockroach.
Sheriff Brody to a shark
Bush to a Liberal

The truth doesn't just hurt. It's painful, like a red hot poker shoved
up their ass. Like sliding down a hundred foot razor blade using their
dick as a brake.

They HATE the truth."

On 2013-06-15, Gunner Asch wrote:
On Tue, 11 Jun 2013 19:08:11 -0500, "Pete C."
wrote:


Karl Townsend wrote:

[ ... ]

Now he's surfing fleabay for a couple VFDs.

Karl

Why a couple of VFDs? You'll never use the hor and vert spindles at the
same time so one VFD will do fine for both.


The problem is turning them on and off. NEVER switch the output line
from a VFD..ever. Only switch the Input (power) TO the VFD

Doing it wrong lets out the magic smoke.

The trick is "never switch the output side of a VFD while it is
powering a motor. If it is halted, you can swithc over to another
motors before spinning it up again. (What you need is an interlock so
the VFD has to be at "halt" before you can switch to a new motor.) But
two VFDS are nicer, anyway.

Enjoy,
DoN.

--
Remove oil spill source from e-mail
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 ---

Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

On Tue, 11 Jun 2013 19:16:16 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

sounds like Iggy best get going, he's got competition for best
scrounger.

Karl

Karl Townsend wrote:

On Tue, 11 Jun 2013 19:16:16 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

sounds like Iggy best get going, he's got competition for best
scrounger.

Heh, I spent about $1,400 including diesel to go get it. If Iggy got it
he'd spend that much but it would all come pre-loaded in a nice box
truck with lift gate and low miles included in the deal.

On 2013-06-12, Pete C. wrote:

Karl Townsend wrote:

On Tue, 11 Jun 2013 19:16:16 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

sounds like Iggy best get going, he's got competition for best
scrounger.

Heh, I spent about $1,400 including diesel to go get it. If Iggy got it
he'd spend that much but it would all come pre-loaded in a nice box
truck with lift gate and low miles included in the deal.

Hey, we all get great deals, good deals, and not so good deals, myself
included. What's important is

1) Always pay not more than market price for what you need
2) Always pay a lot less than the market price for stuff to be resold
3) Not to have way too much stuff that it impedes movement or cash flow

You will get great use of that grinder.

i

Ignoramus5948 wrote:

On 2013-06-12, Pete C. wrote:

Karl Townsend wrote:

On Tue, 11 Jun 2013 19:16:16 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

sounds like Iggy best get going, he's got competition for best
scrounger.

Heh, I spent about $1,400 including diesel to go get it. If Iggy got it
he'd spend that much but it would all come pre-loaded in a nice box
truck with lift gate and low miles included in the deal.

Hey, we all get great deals, good deals, and not so good deals, myself
included. What's important is

1) Always pay not more than market price for what you need
2) Always pay a lot less than the market price for stuff to be resold
3) Not to have way too much stuff that it impedes movement or cash flow

You will get great use of that grinder.

i

The grinder is running as of last night, and purrs like a 70 year old
kitten

On 2013-06-12, Pete C. wrote:

Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

Sounds fun.

i

On Tue, 11 Jun 2013 19:16:16 -0500, "Pete C."
wrote:


Karl Townsend wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I actually did pretty well over the weekend. I got a 1942 vintage 6x18
Norton surface grinder with hydraulic traverse and cross feed, a Brown
and Sharp mag chuck, a large selection of wheels and arbors, 5C spin
indexer, diamond dresser on a B&S mag base, small coolant pump/tank
unit, some assorted 1/2 and 1/4 Loc-Line components, a Precise S 65 high
speed spindle (needs collets and collet nut), two DuMont Minuteman
keyway broach sets, a chucking reamer set, a tub of assorted slotting
and slitting saws and a big box of assorted aluminum hunks 1/4"-3" thick
or so.

Keyway broach? (Perk!)

Need both of them or only one?


--
"You guess the truth hurts?

Really?

"Hurt" aint the word.

For Liberals, the truth is like salt to a slug.
Sunlight to a vampire.
Raid® to a cockroach.
Sheriff Brody to a shark
Bush to a Liberal

The truth doesn't just hurt. It's painful, like a red hot poker shoved
up their ass. Like sliding down a hundred foot razor blade using their
dick as a brake.

They HATE the truth."

"Karl Townsend" wrote in message
...

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

I have a Kempsmith mill very similar to that, with the Bridgeport head on
the overarm. I think my table is 12 X 50 if I remember correctly. They
seem descent, have thrust bearings on table X direction, power feed on all 3
axis. Mine has a gearbox and motor on top for the horizontal mill part,
it's 7.5HP. So I have 7.5HP power feed for my 1 HP Bridgeport head. I've
used the horizontal mill with and end mill in it before, kind of slow
turning but it does the job.

You can also look on "driveswarehouse.com" for VFD's, just to make sure
what you're seeing on eBay isn't overpriced. Also, the drive I have, Allen
Bradley 160, isn't listed as running on single phase for the model I have,
but it does just fine. It will even allow me to switch the motor on and off
while the drive is running at 60Hz without faulting out.

RogerN

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.

i

Ignoramus21475 fired this volley in
:

Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.



Yeah, but Ig, they aren't worth a bunch of melted-down Mason Jars, if you
can't sell 'em!

(I know what they are, and once in my life, I could have used one)

LLoyd

On 2013-06-12, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus21475 fired this volley in
:

Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.



Yeah, but Ig, they aren't worth a bunch of melted-down Mason Jars, if you
can't sell 'em!

So, do you think that I can sell them for something?

I thought, I would put them on auction.

(I know what they are, and once in my life, I could have used one)

LLoyd

Ignoramus21475 fired this volley in
:

So, do you think that I can sell them for something?

I really don't know. When I made my own diagonals for Newtonian 'scopes,
I ground my own flats for interference-pattern checking.

With very little skill, and a LOT of patient labor, one can grind two
mated hunks of glass down to within 1/8 wavelength of flat -- actually
quite easily, if you have the time and are willing to put in the labor.

I think a prior post about their being useful as mirror blanks might be a
good tack to take. A 28" mirror would be a killer amateur collector!

LLoyd

On 2013-06-12, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus21475 fired this volley in
:

So, do you think that I can sell them for something?

I really don't know. When I made my own diagonals for Newtonian 'scopes,
I ground my own flats for interference-pattern checking.

With very little skill, and a LOT of patient labor, one can grind two
mated hunks of glass down to within 1/8 wavelength of flat -- actually
quite easily, if you have the time and are willing to put in the labor.

I think a prior post about their being useful as mirror blanks might be a
good tack to take. A 28" mirror would be a killer amateur collector!

LLoyd

Keep in mind, say, if you make a 7" flat, and spend X hours of labor,
a 28" flat would involve 16X labor. And more importantly, keeping the
tolerance across a much larger surface is so much more
difficult. Everyting works against you.

On Wed, 12 Jun 2013 15:13:17 -0500, Ignoramus21475
wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.

Faskinatin' stuff, Ig. http://en.wikipedia.org/wiki/Optical_flat

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.

--
I have never understood why it is "greed" to want to keep the money you
have earned, but it is not greed to want take someone else's money.
--Thomas Sowell

On Wed, 12 Jun 2013 13:50:02 -0700, Larry Jaques
wrote:

On Wed, 12 Jun 2013 15:13:17 -0500, Ignoramus21475
wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.

Faskinatin' stuff, Ig. http://en.wikipedia.org/wiki/Optical_flat

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.

Not for determining flatness. Small ones are used in metrology labs
for certification, although I never heard of one that large, and I
assume it's used for some purpose in optical equipment, not for
measuring flatness of gages.

But that's just a guess.

--
Ed Huntress

On 2013-06-12, Ed Huntress wrote:
On Wed, 12 Jun 2013 13:50:02 -0700, Larry Jaques
wrote:

On Wed, 12 Jun 2013 15:13:17 -0500, Ignoramus21475
wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.

Faskinatin' stuff, Ig. http://en.wikipedia.org/wiki/Optical_flat

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.

Not for determining flatness. Small ones are used in metrology labs
for certification, although I never heard of one that large, and I
assume it's used for some purpose in optical equipment, not for
measuring flatness of gages.

But that's just a guess.


They used them to make huge cameras for spy satellites and spy drones.

i

Ignoramus21475 fired this volley in
:

They used them to make huge cameras for spy satellites and spy drones.


Prolly not 'used' in the sense of being materials for those cameras, but
rather to check flatness of other optics.

Lloyd

Larry Jaques fired this volley in
:

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.

Folks still use 'flats' to check other glass optics against; less and
less, though.

The other tools are finally coming down in price to the point where
optical flats won't be necessary at all in another 10-15 years (except
for amateur telescope makers who grind their own optics).

LLoyd

On 06/12/2013 01:56 PM, Lloyd E. Sponenburgh wrote:
Larry Jaques fired this volley in
:

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.

Folks still use 'flats' to check other glass optics against; less and
less, though.

The other tools are finally coming down in price to the point where
optical flats won't be necessary at all in another 10-15 years (except
for amateur telescope makers who grind their own optics).

That was my first thought, to repurpose them as telescope mirrors
(assuming they are thick enough). 28 inches would make a pretty nice
light bucket to play with.

Jon

On 2013-06-12, Larry Jaques wrote:
On Wed, 12 Jun 2013 15:13:17 -0500, Ignoramus21475
wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.

Faskinatin' stuff, Ig. http://en.wikipedia.org/wiki/Optical_flat

Sooo, what are you going to do with them? I'm guessing that laser
interferometers (grabbed out of near-space) and other electronic
wizardries have replaced the opticals.


I am gonna sell them, that's for sure. One optical flat lays on
styrofoam, and has some imperfections, the other one "Unertl" stays
vertically in a super heavy enclosure, shielded by a locking shield,
and looks perfect.

i

On Jun 12, 5:30*pm, Ignoramus21475 ignoramus21...@NOSPAM.
21475.invalid wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.



I am gonna sell them, that's for sure. One optical flat lays on
styrofoam, and has some imperfections, the other one "Unertl" stays
vertically in a super heavy enclosure, shielded by a locking shield,
and looks perfect.

i


Do you know what material they are made of? Back in Washington State
I worked on the Battlepoint Observatory.
Their mirror is 27.5 inches in diameter and made of Zerodur, a
extremely low coef of expansion material. They got the blank from
Boeing , it was ground for some star wars project. So they built a
grinding machine to regrind it for a mirror.

See http://www.bpastro.org/index.php?pag...chie-telescope

And see http://www.bpastro.org/index.php?pag...d-of-directors for
the directors. You might contact Malcolm Saunders about selling the
flats. Ho might know someone who is looking for a large blank.

I am in a photo with John Rudolph on thils page.

http://www.bpastro.org/index.php?pag...chie-telescope


Dan

On 2013-06-13, wrote:
On Jun 12, 5:30?pm, Ignoramus21475 ignoramus21...@NOSPAM.
21475.invalid wrote:

I did not start this bragging competition, and that's my excuse for
posting the following: I just bought two "optical flats", 28 inches
diameter, for $50 each plus auction buyer's premium. Then some company
guy told me, Igor, do you know what you bought, I said kinda sorta,
and he said, they cost a million dollars each, they had to grow the
glass in a special chamber.



I am gonna sell them, that's for sure. One optical flat lays on
styrofoam, and has some imperfections, the other one "Unertl" stays
vertically in a super heavy enclosure, shielded by a locking shield,
and looks perfect.

i


Do you know what material they are made of? Back in Washington State
I worked on the Battlepoint Observatory.
Their mirror is 27.5 inches in diameter and made of Zerodur, a
extremely low coef of expansion material. They got the blank from
Boeing , it was ground for some star wars project. So they built a
grinding machine to regrind it for a mirror.

See http://www.bpastro.org/index.php?pag...chie-telescope

And see http://www.bpastro.org/index.php?pag...d-of-directors for
the directors. You might contact Malcolm Saunders about selling the
flats. Ho might know someone who is looking for a large blank.

I am in a photo with John Rudolph on thils page.

http://www.bpastro.org/index.php?pag...chie-telescope


Dan

Dan, fascinating story, I might give them a holler.

i

On Tue, 11 Jun 2013 17:35:36 -0500, Karl Townsend
wrote:

My son just got a free 15" southbend from grandpa just for coming to
visit. Dad tossed in a 12" bench grinder, and a small pickup load of
tools, and a real nice monster wench. No small trip - MN to NM - 2K
miles.

Then "The Kid" just won this auction
http://auctions.machinesused.com/lis...mnum=846984426

Now he's surfing fleabay for a couple VFDs.

Karl

Ive got one of these

http://www.machinetools4sale.com/sho...sp?itemid=1594

I just need to figure out how to get it home. Damned thing is almost
9' tall

Gunner

--
"You guess the truth hurts?

Really?

"Hurt" aint the word.

For Liberals, the truth is like salt to a slug.
Sunlight to a vampire.
Raid® to a cockroach.
Sheriff Brody to a shark
Bush to a Liberal

The truth doesn't just hurt. It's painful, like a red hot poker shoved
up their ass. Like sliding down a hundred foot razor blade using their
dick as a brake.

They HATE the truth."