X Axis Stepper Motor  

RE: X Axis Stepper Motor

It looks like a standard NEMA 17 - but with a bespoke cable.

Most come with socket in the stepper body so it's straightforward to modify the supplied cable for length.

The X axis doesn't do a great deal of work so, as long as you avoid the very cheapest. you should be OK.

Hth, Cheerio,

RE: X Axis Stepper Motor

@diem

Thanks.  I tried a could already.  They won't work.  I order a couple LDO 1.8 motors.  

RE: X Axis Stepper Motor

@cwbullet

I found this on their github;

https://github.com/prusa3d/Original-Prusa-MINI/blob/master/DOCUMENTATION/ELECTRONICS/mini-motor-kit.pdf

Hope it helps.

RE: X Axis Stepper Motor

@cwbullet

The Prusa LDO stepper motors are directly wired (no plug). I think this one should fit:

LDO-42STH40-1004ASR

LDO-42STH40-1004AH

Which LDO-set did you order for the Mini?

RE: X Axis Stepper Motor

42STH40-1004ASH

RE: X Axis Stepper Motor

Thank you, I appreciate the help.  

RE: X Axis Stepper Motor

Posted by: @mrstoned

@cwbullet

I found this on their github;

https://github.com/prusa3d/Original-Prusa-MINI/blob/master/DOCUMENTATION/ELECTRONICS/mini-motor-kit.pdf

Hope it helps.

That was essential.  Thanks.  

RE: X Axis Stepper Motor

I tried a couple more stepper motors.  I had an extra Creality X stepper.  It would not spin.  It did this off jumping as I tried to get to spin.  

I also tried:

1. https://www.amazon.com/gp/product/B07GDD2X4B/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
2. https://www.amazon.com/gp/product/B07GDBMT1D/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
3. https://www.amazon.com/gp/product/B0817T5SRH/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

These all did the same thing.  I wonder if the wiring is different for a Creality and Prusa Motor.  

RE: X Axis Stepper Motor

The only difference i can see that might be critical, is the rated current. 6.5v for the prusa/ldo and between 3.6 and 4.8 for those on amazon.

I might have missed something, or if they are speced differently to eachother.

RE: X Axis Stepper Motor

@mrstoned

I wonder if there is any wiring difference.  

RE: X Axis Stepper Motor

@cwbullet

If you use other steppers, I would check if the connections match the pin assignment on the buddyboard (A, A-, B, B-). The colors of the wires will probably not match and you may have to change the cable positions.

RE: X Axis Stepper Motor

NEMA 17 specifies only the motor mount. Electrical specifications differ wildly between NEMA17 motors. Voltage, Amperes and wiring must match, also steps/r can differ, 32, 64, 200 and 400 are all quite common. I didn't find electrical specs for Prusa Mini steppers.

UPDATE: cwbullet has already found the document with stepper specs. All similar steppers should work, but you might need to look your replacements documentation to get wiring to match the original.

RE: X Axis Stepper Motor

@karl-herbert

Thanks.  I will try that tonight.  

RE: X Axis Stepper Motor

@lupin

Makes sense.  

RE: X Axis Stepper Motor

@cwbullet

Have you found another source for the Prusa Mini motors?

Was going to try and give these a try and order the whole set as am having problems with the x axis.

https://www.aliexpress.com/item/4000889877511.html?gps-id=pcStoreJustForYou&scm=1007.23125.137358.0&scm_id=1007.23125.137358.0&scm-url=1007.23125.137358.0&pvid=c3df1b3f-9ebc-4e06-904d-a2b793dfc479&spm=a2g0o.store_home.smartJustForYou_822822426.2

RE: X Axis Stepper Motor

Posted by: @cwbullet

I need to replace my stepper motor.  I started a print to find the X-axis wire pulled out when I returned.  Any idea of the specs of this motor?  

Hi,

Did you find a viable replacement?

RE: X Axis Stepper Motor

These are the specifications of the Prusa Mini motors. A replacement motor should have similar specifications.

Prusa-mini-motor-kit

Maybe you will find something suitable here or here.

wbr,

Karl

RE: X Axis Stepper Motor

Hi, I'm having difficulty sourcing the ldo model mentioned earlier, any other hint for x and y motor?