And I have adequately repaired many auto generators by manually filing the armature "round" and undercutting the mica with a broken piece of fine-tooth hacksaw.? The "poor boy" method...
-Guy-?
On June 23, 2023 at 11:53 PM Charles Kinzer <ckinzer@...> wrote:
?
Here is an armature lathe designed for use in a typical auto repair shop back in the day.? Another aspect is the need to undercut the mica insulators and that is the little attachment in back in the area of the commutator.? This is a photo from an eBay listing that is handy because it has an armature from a generator mounted AND shows how the rotation is powered by a belt directly around the armature.
You could certainly use a Unimat to turn a commutator but might have to raise the head and tail stocks even higher than what is possible with the stock riser blocks.? And you would have to rig up some means to do the mica undercutting.
Charles E. "Chuck" Kinzer
On Friday, June 23, 2023 at 08:02:45 PM PDT, Keith S. Angus <keithsangus@...> wrote:
You sometimes see a rotating chuck for use in the tailstock - they were intended to support the end of a dynamo (or motor) when skimming the commutator. I dimly recall diamond tipped tools being used for this. Wish I'd grabbed a few back when I worked with contact lenses, turned up with diamond tools on spherical turning lathes.
?
?
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Re: SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS
Hello:
Thank you for taking the time to write.
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On 25 Jun 2023 at 8:41, Mike Gidley wrote:
> The chart shows the standard metric sizes. I have cut a M22x1.5
> thread with this setup
I see, the thing is in the *standard* part.? 8^)
I now recall having read that 14x1.0 is not a standard thread.
So, if I understand this correctly, to make *any* size x1.0 thread, I just
have to use the gears for the 1.0 pitch.
ie: Z50, Z25, Z25 and Z50.
The chart in the post is not Emco issue but it seems to be a copy of the
(corrected) original which was just as confusing for me.
Would have been easier to just match 'gear arrangements' to 'pitch'.
Like the thread chasers for the #150250 accessory, one for each of
the the available pitches. ?
Thank you very much for clearing this up for me.
Best,
JHM
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Re: SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS
Pick a 1.0mm pitch from the chart and turn your material to 14mm then start cutting your thread. The chart is only a guide to standard metric pitches. I have cut a M22 x 1.5 pitch thread with this setup. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Julius Henry Marx
Sent: Sunday, 25 June 2023 8:56 AM
To: Neil Morrison <neilsmorr@...>; [email protected]
Subject: Re: [Unimat] SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS ? Hello: ... in?/g/Unimat3/files
Yes, I've been there quite a few times.
But have not found anyhting on how to make a non-standard thread (like 14x1) with this accessory.
But I'l have another look.
Thanks for your input.
Best,
JHM
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Re: SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS
Hello:
... in?/g/Unimat3/files
Yes, I've been there quite a few times. But have not found anyhting on how to make a non-standard thread (like 14x1) with this accessory. But I'l have another look. Thanks for your input. Best, JHM
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Re: SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS
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On Sat, Jun 24, 2023 at 12:54?PM Julius Henry Marx < sawbona@...> wrote: Hello:
I have one of the versions (plastic, not metal) of the Unimat 3 Thread Cutting Gears accessory (#150200).
From what I can make out, the gear table you have posted reads like this:
Is M10 the largest diameter that can be threaded with this accessory?
I mean ...
What is needed to get a properly installed grooving tool on the carriage/slide to move/cut towards the headstock at 1.0mm / revolution on a piece of round stock larger than M10?
Am I missing something? Most probably ... 8^°
I have not been able to find a manual for this 150200 part save this chart.
Thanks in advance.
Best,
JHM
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Re: SHERLINE TO UNIMAT 3 THREADING ATTACHMENT ADAPTER DRAWINGS
Hello: I have one of the versions (plastic, not metal) of the Unimat 3 Thread Cutting Gears accessory (#150200). From what I can make out, the gear table you have posted reads like this:  Is M10 the largest diameter that can be threaded with this accessory? I mean ... What is needed to get a properly installed grooving tool on the carriage/slide to move/cut towards the headstock at 1.0mm / revolution on a piece of round stock larger than M10? Am I missing something? Most probably ... 8^° I have not been able to find a manual for this 150200 part save this chart. Thanks in advance. Best, JHM
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Hello,
if Jeff decides not to buy the steady rest, I will.
I am located in Spain.
But Jeff has the first chance of course...
Greetings from Asturias
Frithjof
On 24/06/2023 16:04, rcjge wrote:
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Ruben, that was for you btw, about the steady rest!
cheapest shipping possible, speed not issue.
Jeff
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Ruben, that was for you btw, about the steady rest!
cheapest shipping possible, speed not issue.
Jeff
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You might say it has potential, but there again, potential (difference) seems to be what’s missing.
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On 24 Jun 2023, at 02:45, Scott B <sbilotta@...> wrote:
?
Hmm…? could this be a perpetual motion machine?
?
?
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
?
Here's one I bought some years ago on eBay. I cannot find a better picture of it.
Peter Brixey in sunny Florida.
<image001.jpg> <image001.jpg>
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What would shipping to Canada be?
Jeff
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This moment I have a steady rest for sale if you're interested.
Price: �70,-
I'm in the Netherlands.
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Here is an armature lathe designed for use in a typical auto repair shop back in the day.? Another aspect is the need to undercut the mica insulators and that is the little attachment in back in the area of the commutator.? This is a photo from an eBay listing that is handy because it has an armature from a generator mounted AND shows how the rotation is powered by a belt directly around the armature.
You could certainly use a Unimat to turn a commutator but might have to raise the head and tail stocks even higher than what is possible with the stock riser blocks.? And you would have to rig up some means to do the mica undercutting.
Charles E. "Chuck" Kinzer
On Friday, June 23, 2023 at 08:02:45 PM PDT, Keith S. Angus <keithsangus@...> wrote:
You sometimes see a rotating chuck for use in the tailstock - they were intended to support the end of a dynamo (or motor) when skimming the commutator. I dimly recall diamond tipped tools being used for this. Wish I'd grabbed a few back when I worked with contact lenses, turned up with diamond tools on spherical turning lathes.
|
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On Jun 23, 2023, at 9:08 PM, Keith S. Angus <keithsangus@...> wrote:
?On Fri, Jun 23, 2023 at 08:31 PM, Charles Kinzer wrote:
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
Back in the days when electrical interference was more of a problem than it is now, in that very little equipment was protected from it, it was found that one of the best ways to avoid mains borne interference was to make up a motor generator set, mains driven, with the generator giving whatever voltage you needed. Not the same as a rotary convertor, as that does not give electrical isolation. Also adding a big flywheel would smooth out any momentary glitches in the supply.
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On Fri, Jun 23, 2023 at 08:31 PM, Charles Kinzer wrote:
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
Back in the days when electrical interference was more of a problem than it is now, in that very little equipment was protected from it, it was found that one of the best ways to avoid mains borne interference was to make up a motor generator set, mains driven, with the generator giving whatever voltage you needed. Not the same as a rotary convertor, as that does not give electrical isolation. Also adding a big flywheel would smooth out any momentary glitches in the supply.
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You sometimes see a rotating chuck for use in the tailstock - they were intended to support the end of a dynamo (or motor) when skimming the commutator. I dimly recall diamond tipped tools being used for this. Wish I'd grabbed a few back when I worked with contact lenses, turned up with diamond tools on spherical turning lathes.
|
Hmm…? could this be a perpetual motion machine?
?
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From: [email protected] < [email protected]> On Behalf Of
Mehmood via groups.io
Sent: Friday, June 23, 2023 12:20 PM
To: [email protected]
Subject: [Unimat] ISO Steady rest
?
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
?
Here's one I bought some years ago on eBay. I cannot find a better picture of it.
Peter Brixey in sunny Florida.
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++ Santa's helpers are subordinate clauses.
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On Jun 23, 2023, at 3:20 PM, Mehmood via groups.io <mehmood.naqshbandi@...> wrote: ? Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
Begin forwarded message:
?
Here's one I bought some years ago on eBay. I cannot find a
better picture of it.
Peter Brixey in sunny Florida.
|
There was (is?) a type of lathe called a "commutator lathe".? Their most typical application was most likely turning the commutators (cleaning them up) on automobile generators.? It was a pretty common item in auto repair garages at one time.? It is sized to swing the large diameter of the armature but with strength more in line with turning the smaller diameter of the commutator.? So, even more so than regular lathes, it was not designed at all to machine anything the size of its full swing.
Charles E. "Chuck" Kinzer
On Friday, June 23, 2023 at 12:20:24 PM PDT, Mehmood via groups.io <mehmood.naqshbandi@...> wrote:
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
Begin forwarded message:
?
Here's one I bought some years ago on eBay. I cannot find a
better picture of it.
Peter Brixey in sunny Florida.
|
Brilliant idea to turn your lathe into a generator! ?Just apply electricity to the commutator and then harvest power from the plug. ?Handy if you don’t have, errm, electricity.
Begin forwarded message:
toggle quoted message
Show quoted text
?
Here's one I bought some years ago on eBay. I cannot find a
better picture of it.
Peter Brixey in sunny Florida.
|
Here's one I bought some years ago on eBay. I cannot find a
better picture of it.
Peter Brixey in sunny Florida.
|
rcjge
Ruben
Steve Johnson
John Entwistle
