"Basic Technical Information" U3 book?
Does anyone have a copy of the book "Basic Technical Information and Practical Applications of the Unimat 3"?
I saw it in the "HobbyProducts_(NeilsCompressed).pdf" catalog from the files section, but can't find much at all about it online. It seems to have only been mentioned once in this group.
If anyone has a PDF I'd be grateful. Or if you have a physical copy, I'd be interested in helping you get it scanned.
Thanks!
Joel
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Re: Someone using U3 threading attachment?
I know how to use the original attachment. It is not the problem. I just wonder if it is worth spending money to make the attachment complete, I'm missing some parts. Therefore, I ask again, is there someone who use the original threading attachment for U3? And....is it a good solution for treadcutting in U3?
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Re: Someone using U3 threading attachment?
Hi Peter,? I am interested in this also I have downloaded your files but do you have an image of your parts setup on the U3 and how you use it please.
?
Phill
?
?
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Re: Someone using U3 threading attachment?
I use? ine a fair bit, you have to hand crank it, but otherwise it? isn't difficult to? use,? just set up for the thread? pitch? you? want,? and crank away . There is ¨¤ drawing I made of all the parts on the files section of the? u3 group. The gears are plastic so could be? 3d ptinted
Sent from
I have a U3 and some of the parts for the threadcutting attachment. But I don't know if? it is worth? searching for the parts I don't have. I can't see any pictures of some U3 with this attachment mounted in the Internet. And no Youtubes either. Is it a attachment someone use? Is it difficult to use? I have seen homemade attachment for threading. Maybe be better, easier? Please give me some advise.
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Re: Someone using U3 threading attachment?
Check the Files section here for instructions on how to use the various accessories. There should be diagrams of photographs of the various parts.
On Fri., Apr. 11, 2025, 2:18 p.m. mikaelvberger via , <mikaelvberger= [email protected]> wrote: I have a U3 and some of the parts for the threadcutting attachment. But I don't know if? it is worth? searching for the parts I don't have. I can't see any pictures of some U3 with this attachment mounted in the Internet. And no Youtubes either. Is it a attachment someone use? Is it difficult to use? I have seen homemade attachment for threading. Maybe be better, easier? Please give me some advise.
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Re: Any advice on replacement for U3 's threading attachment lead cutting screws and followers
#U3accesory
I also have the threading attachment for the U3 but misses some parts, lead cutters and followers. But is there anyone use this assessory? I can't see any pictures on a U3 with this accessory mounted. And no Youtube either. Is it a hard using attachment? Is it better make one by myself? Advise, please!
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Someone using U3 threading attachment?
I have a U3 and some of the parts for the threadcutting attachment. But I don't know if? it is worth? searching for the parts I don't have. I can't see any pictures of some U3 with this attachment mounted in the Internet. And no Youtubes either. Is it a attachment someone use? Is it difficult to use? I have seen homemade attachment for threading. Maybe be better, easier? Please give me some advise.
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I purchased an Optivisor clone from ebay UK and the glass is excellent (comes with four lenses). Ebay list number is??286136920540
-- Alan H.
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I like mine. Thank you, Amazon.?
Get
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I was watching a BBC art program, and found someone at the Courthauld Institute in London examining a large painting.? Note the Optivisor.? If good enough for them, then should be OK for us.
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I was watching a BBC art program, and found someone at the Courthauld Institute in London examining a large painting.? Note the Optivisor.? If good enough for them, then should be OK for us.
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Go?to /sendloginlink - apparently you will be emailed a link that is valid for 30 minutes.
?
Once you are in on the website you can change your password for a new one (in 'Settings' presumably).
?
Of course this depends on you remembering the email address that you registered with, and still having access to it.
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Hi Dick, I'm having trouble accessing my free groups.io account. Could you advise on how to recover it? Thanks, [User's Name] old toolmaker
On Tuesday, October 29, 2024, 10:58 AM, John Entwistle via groups.io <jentwistle3@...> wrote: Looking forward to seeing this as I still want to make an ER-16 collet chuck on the Unimat. On Oct 28, 2024, at 8:39 PM, OldToolmaker via groups.io <old_toolmaker@...> wrote: ? I have just bought a piece of 1-3/4¡± diameter 303 Stainless round stock to make an ER32 ?collet chuck to fit my DB200 Unimat. I have an ER32 collet nut and a full set of 25 ER32 Collets from a 7x16 lathe I owned at one one time and this will work well for my Unimat.
I intend to use the Unimat itself to machine up the tooling. I will post pictures as it progresses.
Dick
--
http://www.homemadetools.net/ forum/?OFF- SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI- LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
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Re: SL motor heats up and..
If you hit any snags or want any advice, post your questions here.
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Re: SL motor heats up and..
Yes, I have seen mine is marked like that.
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Re: SL motor heats up and..
Thanks everyone for your replies and helpful advice. I have purchased a 24 V DC motor, 150w and 4000rpm, as well as a 10A power supply and vsc. I will adapt Keith¡¯s drawings (thanks for sharing those!) to build a mounting bracket and spindle adaptor. I hope I have some spare time during Easter for this.
?
regards,
Fran
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Re: SL motor heats up and..
On Mon, Apr 7, 2025 at 03:50 AM, Keith S. Angus wrote:
These motors are getting quite old now, and many are marked 80 minutes on, 2 minutes off
That should, of course, have read 8 minutes on, 2 minutes off!
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Re: SL motor heats up and..
These motors are getting quite old now, and many are marked 80 minutes on, 2 minutes off, or something like that. They do get hot in continuous use, and when they get to hot the windings start to burn. Is it tripping the current overload, or the earth leakage trip? Actually it doesn't matter. It's on its way out.
?
Get a 24 V DC motor rated at between 100 to 150 Watts (I use 130 W) like this one - Ebay item 146489217625. It takes a bit of work to fit it, but not too much. You can use a speed controller with them, but I found I ignored mine and just changed speed with the belts. But id f you do want one, I'd look at something like this - Ebay item 405526646363. Then you need a 24 V power supply like this, 24 V 10 A, Ebay item 355025807336.
?
All these bits are from China so there may be some confusion, but I think you will find them, or se very like them, from more local suppliers. There are a few descriptions of how to fit the motor, including mine, in the Photos,
?
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There are variants of the motor. The one I found on Ebay is very like the one I used. If you can find one with a longer shaft that's a big help, also having the lead at the opposite end to the shaft. Some have a tooth belt pulley on them, and it's a pain to get it off. Others have a sprocket for a roller chain, and a lot of the shaft is threaded for it. In both those cases the shaft is a bit too short. A longer plain shaft is much better.
?
With the DC motor I was running the lathe continuously for an hour at a time and the motor got a little bit warm. That was for polishing, which is a low power load, but I also used it for fairly continuous turning, and it never got hot doing that either.
?
Avoid high power motors - they are too big and with excess power you also get excess damage when things go wrong. Using the 3 phase motor with a variable frequency drive will, I think, give trouble if you overload it to the point of slowing the motor down. My experience of motors like this is that they don't slow down gracefully as the load increases, but reach a break point where the drive can't cope any more and you get a lot of noise and vibration. n advantage with the simple DC motor is that you don't really need a speed controller - you can run it straight from a 24 V DC power supply, and that's one less thing to go wrong.
?
Also it's a change many of us have made, and it simply works.
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Re: SL motor heats up and..
Use? pulse width modulation (PWM) controller to control your DC motor speed. It uses pulses of variable width but very close to full voltage to control the motor speed with minimal loss of power. Lots of options on ebay and amazon.
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Sunday, April 6, 2025 at 06:31:42 AM CDT, Carl via groups.io <carl.blum@...> wrote:
Hello Tia:
I think you
have a bad motor. To trip the house breaker, 15 amp or larger,
is a huge current for a motor that should draw 1 amp. I think
your motor has shorted windings, will run but overheats, burning
more insulation off.
I have the
plastic case motor that has never stopped for me. I have a spare
24 volt replacement motor that is still waiting in store.
Knowing more
about motors I would look for a small 3 phase motor and a
Variable Frequency Drive (VFD). This would give you full power
at all speeds. Lowering the voltage to slow a 24 volt motor also
cuts the available power.
Ebay motor:
Ebay controller:
This is only one possible
combination. I put a VFD in to run my surface grinder and it
works great.
The easiest option is to
just buy a new Unimat motor that bolts on. But they can be
pricey.
Good luck, Carl.
On 4/6/2025 5:39 AM, Fran via groups.io
wrote:
Hi,?
These days I am having more time to get used to the Unimat SL
I purchased months ago. I have started working on some new
stumps for a watchmakers staking set, and After 5 to 10 minutes,
the (SL original) motor heats up a lot, and then suddenly shuts
down the house¡¯s fuse. It happens again and again until I quit
and leave the thing alone to cool down completely.?
Any ideas about what can I do to improve this?
TIA
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Re: SL motor heats up and..
Which motor do you have? I don¡¯t have that problem with the U100 but the older motors had a limited duty cycle. The hot setup (sorry) is to replace the motor with a scooter motor - there are dozens of discussion threads on here about how do that.
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On Apr 6, 2025, at 9:24?AM, Jkle379184 via groups.io <jkle379184@...> wrote: ?
I think that the SL motor is only rated and so minutes of run time before it has to cool down. ?Jeff
Hi,?
These days I am having more time to get used to the Unimat SL I purchased months ago. I have started working on some new stumps for a watchmakers staking set, and After 5 to 10 minutes, the (SL original) motor heats up a lot, and then suddenly shuts down the house¡¯s fuse. It happens again and again until I quit and leave the thing alone to cool down completely.?
Any ideas about what can I do to improve this?
TIA
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Re: SL motor heats up and..
I think that the SL motor is only rated and so minutes of run time before it has to cool down. ?Jeff
Hi,?
These days I am having more time to get used to the Unimat SL I purchased months ago. I have started working on some new stumps for a watchmakers staking set, and After 5 to 10 minutes, the (SL original) motor heats up a lot, and then suddenly shuts down the house¡¯s fuse. It happens again and again until I quit and leave the thing alone to cool down completely.?
Any ideas about what can I do to improve this?
TIA
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OldToolmaker
Bill in OKC too
John Entwistle