Re: Found this photo - anyone has more information about it?
Hello:
> ... essentially a split nut and he is using adjusting screws ...
I see.
Now I get it.?
There's also the type of fix used in 3D printers consisting of a spring loaded nut.
It could done in minutes if the replacement part (ASA 050 040 - cross slide nut) were available. ????????????????????????????????????????????????????????
Best,
JHM
|
Re: Found this photo - anyone has more information about it?
i am the builder of this nut. its a splited nut.
to adjust the gap i use 2 grubscrews m2. the grubscrews press on small balls from old bearings. ball diameter 1.3 or 1.5mm
the balls pressed in after i cut the m2 thread.
the balls are used to fill the hole and give a press point. to use this nut the crossslide must be milled a slot of the size of the nut for correct position and height .
slot depht about 1,3mm
|
Re: Found this photo - anyone has more information about it?
Or just shorten at the threaded length (maybe, for ease).
Mihai
|
Re: Found this photo - anyone has more information about it?
There could be an alternative - have them but not tried yet. Solder one in slightly opened state, fully drill, thread, melt alloy and fit in a corresponding hole for screw passing with a lock-nut (length position variable) or other mean with controlled tightening. Best regards, Mihai 
|
Re: Found this photo - anyone has more information about it?
On Tue, Jun 14, 2022 at 02:15 AM, @juliushenrymarx wrote:
I could not make heads or tails of the OPs explanation.
It is essentially a split nut and he is using adjusting screws to open the gap and reduce the backlash - I think. Alternatively screws could be used to reduce the gap. An alternative is a double nut with a fixed spacing and rotate one relative to the other. That is one of the easier ones to add to a machine since you can leave the existing nut alone and find a place to add the second one. I proposed some time ago (for the DB/SL) a nut split horizontally and using a screw to press the two halves together. I think that covers most options!
|
Re: Unimat 3 - 150.250 Lathe theading attachment query
It's covered on the owner manuals on the website.
Hello:
Among the things that came with my Unimat 3, there is a "lathe threading attachment" (part n¡ã 150250).
It is complete albeit with only a 1.0mm guide and former set? (part n¡ã 150330).
It just needs some cleaning up.
What I do not have and have been unable to find (so far) is the instruction sheet/user manual that I expect was included in the box.
Does anyone have a copy or know where one may be found?
Thanks in advance,
JHM
|
Re: Found this photo - anyone has more information about it?
Hello: > @JHM - the photo is from in this thread ... Thanks for the heads up. > ... have to go make one of those for myself too. :D
Well ...
Let me/us know when you're done.
And please consider documenting the how-to so the rest of us may have a go at it.
I could not make heads or tails of the OPs explanation.
Thanks in advance.
Best,
JHM
|
Unimat 3 - 150.250 Lathe theading attachment query
Hello:
Among the things that came with my Unimat 3, there is a "lathe threading attachment" (part n¡ã 150250).
It is complete albeit with only a 1.0mm guide and former set? (part n¡ã 150330).
It just needs some cleaning up.
What I do not have and have been unable to find (so far) is the instruction sheet/user manual that I expect was included in the box.
Does anyone have a copy or know where one may be found?
Thanks in advance,
JHM
|
Re: Alternative motor for the Unimat SL
I measured the length of my 150 watt 24v motors and they are 1-1/2¡± shorter than my U90 motors. That opens my field of vision on the vertical setup making it much easier to see what I am doing.
Dick
|
Re: Found this photo - anyone has more information about it?
@JHM - the photo is from in this thread:
| [email protected] | unimat 3 cnc |
|
|
And now I have to go make one of those for myself too. :D
- Dwayne
On Monday, June 13, 2022 at 03:01:15 PM EDT, sawbona@... <sawbona@...> wrote:
Hello:
This new member was rummaging through files yesterday afternoon and found this:
/g/Unimat/photo/0/46015.56320.0?p=Created%2C%2C%2C20%2C2%2C420%2C0
I can recognise it as a device to adjust/improve backlash in our dear and very backlashy DB200/SL1000 and Unimat 3.
But that's all.
No text, no details.
Is there a post for it somewhere here?
Thanks in advance.
Best,
JHM
|
Re: Found this photo - anyone has more information about it?
|
Found this photo - anyone has more information about it?
Hello:
This new member was rummaging through files yesterday afternoon and found this:
/g/Unimat/photo/0/46015.56320.0?p=Created%2C%2C%2C20%2C2%2C420%2C0
I can recognise it as a device to adjust/improve backlash in our dear and very backlashy DB200/SL1000 and Unimat 3.
But that's all.
No text, no details.
Is there a post for it somewhere here?
Thanks in advance.
Best,
JHM
|
Re: Alternative motor for the Unimat SL
Hello:
> ... used your link ...
And the price for just 'one' was?
>... did not give a total price. Just shipping of $63 and change.
When I ordered mine shipping was ~ US$22.00.
When I selected two instead of one, shipping went up to almost double.
My wallet sent a shiver ...? 8^/
But if you are getting two motors? for ~US$17.00 and just US$21.00 shipping, it looks like good deal to me.
But then it is not my moolah. 8^D
Best,
JHM
|
Re: Alternative motor for the Unimat SL
Yes. I used your link, and selected three motors. It did not give a total price. Just shipping of $63 and change. If I changed it to two motors it dropped the shipping to about $21. For my purposes, I need 3 of them. Two Unimats, and a toolpost grinder for a larger lathe. If I wanted it sooner than August shipping could go upwards of $100.
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!
On Monday, June 13, 2022, 05:51:43 AM CDT, sawbona@... <sawbona@...> wrote:
Hello:
> ... sure about that?
Yes ...
Although today it has a higher price: US$8.41
Are you looking at the link I posted?
This is what I paid, the total amount reflected both on the confirmation email and my credit card movements:
Motor US$? 7.92
Collet US$? 2.72
S+H?? US$19.58
Total: US$30.22
There was a US$4.00 coupon/discount for orders over US$5.00 somewhere along the line.
ETA ~ early August.
No taxes as the orders is not over? the US$50.00 limit.
Best,
JHM
|
Re: Alternative motor for the Unimat SL
Hello:
> ... looked carefully at the shipping costs before ...
Of course.
> ... wanted $63 and up in shipping ...
Shipping costs have gone up exponentially in the lat three/four years.
From anywhere to anywhere, lotsa $$$.
I have found that you have to avoid using *anything* but economy shipping with tracking, bear the waiting times and hope things do not get lost.
> ... a cheap bastrich, and can't spend ...
Yes, so am I.
And as import taxes are usually levied on cost+shipping, it stings more.
Best,
JHM
|
Re: Alternative motor for the Unimat SL
Hello:
> ... sure about that?
Yes ...
Although today it has a higher price: US$8.41
Are you looking at the link I posted?
This is what I paid, the total amount reflected both on the confirmation email and my credit card movements:
Motor US$? 7.92
Collet US$? 2.72
S+H?? US$19.58
Total: US$30.22
There was a US$4.00 coupon/discount for orders over US$5.00 somewhere along the line.
ETA ~ early August.
No taxes as the orders is not over? the US$50.00 limit.
Best,
JHM
|
Re: Alternative motor for the Unimat SL
Look for (24vdc 150w motor) on Amazon or online surplus places. The power supply and speed control are easy - eBay.
Neil
Hello:
I have recently purchased a Unimat 3 and am currently in the process of finding a suitable motor to replace the original 90W one.
|
Re: Alternative motor for the Unimat SL
Hope you looked carefully at the shipping costs before you ordered. I wanted 3 of them, they wanted $63 and up in shipping, where one? was $11.98 or so. I'll be looking elsewhere. I'll get something one of these days. I'm a cheap bastrich, and can't spend that much on shipping. ;)
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!
On Sunday, June 12, 2022, 08:26:54 PM CDT, sawbona@... <sawbona@...> wrote:
Hello:
> ... look at my album ...
Will do. Thanks for the heads-up.
> ... used a 130 W ...
Earlier today I ordered one similar to the one referenced by NapierDeltic in his post.
Only US$7.92.
https://www.aliexpress.com/item/33009729521.html?gatewayAdapt=glo2esp
> ... polyurethane belts and found they never slipped.
Yes, I have heard that they don't slip.
But I cannot help but thinking that a slipping belt is a sort of insurance.
And could eventually save a locked lathe.
> ... shock had been efficiently transferred to the motor bearings ...
> ... needed to be replaced (with high quality ones - I suspect the originals were a bit cheap and cheerful).
Yes.
Maybe I should do that directly do it before installing the motor.? 8^/
> ... motors get longer ...
Yes.
The version I ordered is only 80mm long (200W/280mN. m)
I think the 300W version is 172mm long and 400mN. m.
Just over twice as long for ~43% more torque, same diameter.
> ... shafts are 8 mm so a direct fit for the U3 pulley and the fixing screws line up with the slots in the U3 ...
That's good to know.
I also ordered a ER113mm chuck spindle just in case I want to use a different pulley.?
> ... new set of pulleys ...
> ... speed controller for it ...
> ... get the speed nearly right with the belts ...
Yes, same here.
I wonder if there's a power curve graph available for these motors.
It would help in finding the speed range with the highest torque.
Thank you very much for your input.
Best,
JHM
|
Re: Alternative motor for the Unimat SL
On Mon, Jun 13, 2022 at 02:26 AM, @juliushenrymarx wrote:
Earlier today I ordered one similar to the one referenced by NapierDeltic in his post.
Only US$7.92.
https://www.aliexpress.com/item/33009729521.html?gatewayAdapt=glo2esp
Are you sure about that? According to my currency convertor that's about 95 USD. Available on Ebay UK for about ?45 from China. Probably taxes and things on top of that. Also says 55 USD.
|
Re: Alternative motor for the Unimat SL
Hello:
> ... look at my album ...
Will do. Thanks for the heads-up.
> ... used a 130 W ...
Earlier today I ordered one similar to the one referenced by NapierDeltic in his post.
Only US$7.92.
https://www.aliexpress.com/item/33009729521.html?gatewayAdapt=glo2esp
> ... polyurethane belts and found they never slipped.
Yes, I have heard that they don't slip.
But I cannot help but thinking that a slipping belt is a sort of insurance.
And could eventually save a locked lathe.
> ... shock had been efficiently transferred to the motor bearings ...
> ... needed to be replaced (with high quality ones - I suspect the originals were a bit cheap and cheerful).
Yes.
Maybe I should do that directly do it before installing the motor.? 8^/
> ... motors get longer ...
Yes.
The version I ordered is only 80mm long (200W/280mN. m)
I think the 300W version is 172mm long and 400mN. m.
Just over twice as long for ~43% more torque, same diameter.
> ... shafts are 8 mm so a direct fit for the U3 pulley and the fixing screws line up with the slots in the U3 ...
That's good to know.
I also ordered a ER113mm chuck spindle just in case I want to use a different pulley.?
> ... new set of pulleys ...
> ... speed controller for it ...
> ... get the speed nearly right with the belts ...
Yes, same here.
I wonder if there's a power curve graph available for these motors.
It would help in finding the speed range with the highest torque.
Thank you very much for your input.
Best,
JHM
|
NapierDeltic
OldToolmaker
Bill in OKC too