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Upgrading stock XY stepper motors  

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Robb
 Robb
(@robb)
Eminent Member
Upgrading stock XY stepper motors

I have vertical banding which is a known issue with the stock Prusa 1.8 deg stepper motors. Therefore I want to try replacing them with .9 deg motors. I want make sure I pick the best option, which by reading old threads seems to be the Moons' MS17HA2P4100.  Are they still the best option?  I could save a few bucks and get the LDO branded ones, but the Moons' seem to have slightly better results and I would have buyers remorse if I cut myself short.

 

I also know I have to adjust my steps, but that isn't an issue.

Posted : 24/04/2020 1:51 am
vintagepc
(@vintagepc)
Member
RE: Upgrading stock XY stepper motors

Probably one of the major issues people encounter with that mod is the motor change makes sensorless homing and crash detection no longer work. There are some third party firmware options that may work, but not all have reported success.

Sounds like you already found it, but if not, there's 46 pages worth of reading here:

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles-.../stepper-motor-upgrades-to-eliminate-vfa-s-vertical-fine-artifacts/

 

In my case I went with the StepperOnline offering (17HM15-0904S) and was pleasantly surprised to find I can continue to use the stock firmware after accounting for the step changes, and the surface finish is superb.

 

 

Posted : 24/04/2020 12:07 pm
Robb
 Robb
(@robb)
Eminent Member
Topic starter answered:
RE: Upgrading stock XY stepper motors

@vintagepc

That is actually the thread that I took a look at and learned about which motors are best.  However... I didn't read through all 46 pages and read about the issues with homing/crash detection.  Welp, you sold me, I'm going to grab a couple StepperOnline motors and slap those on.

Posted : 25/04/2020 1:46 am
dualixas
(@dualixas)
New Member
RE:

Do (17HM15-0904S) really work ? as 0.9 steppers like on new PRUSA MK4 with no need to change in the firmware. I am also thinking of thicker body and higher strength motors as my x and y axis lost it's power over a few years due to failed bearing change.

This post was modified 11 months ago by dualixas
Posted : 18/12/2023 1:12 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Upgrading stock XY stepper motors
Posted by: @robb

I have vertical banding which is a known issue with the stock Prusa 1.8 deg stepper motors. Therefore I want to try replacing them with .9 deg motors. I want make sure I pick the best option, which by reading old threads seems to be the Moons' MS17HA2P4100.  Are they still the best option?  I could save a few bucks and get the LDO branded ones, but the Moons' seem to have slightly better results and I would have buyers remorse if I cut myself short.

 

I also know I have to adjust my steps, but that isn't an issue.

I have been using 0.9 deg Moon's stepper (MS17HA2P4100) on my MK3 for years. They work without any problems. Esteps (and possibly some current settings) must be adapted in firmware.

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles/stepper-motor-upgrades-to-eliminate-vfa-s-vertical-fine-artifacts/

 

https://www.moonsindustries.com/p/nema-17-high-precision-hybrid-stepper-motors/ms17ha2p4100-000004611110015917

MS17HA2P4100_Anschluss_Einsy_Rambo_1.1a

 

wbr,

Karl

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.

Posted : 18/12/2023 1:39 pm
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