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Question about Z stepper motor

Posted: Wed Aug 19, 2015 5:38 pm
by DrRobot
Hello everyone! I just got my M2 assembled and tested last night. Everything works well so far, except that when I was jogging along Z axis, it accidentally hit the limit at the bottom, and the Z stepper motor seemed skipping gears and made some loud grinding noise. I stopped the machine immediately after that. Would this cause any damage to the leadscrew and the Z motor? Thanks!

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 5:44 pm
by Jules
Sure hope not - done it a dozen times at least. :P

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 5:51 pm
by Mark the Greater
Me too! Just don't let it happen again. Or else...

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 6:00 pm
by DrRobot
I was hoping there is a mechanism in stepper motors, when there is excessive force applied, it just skips without causing any damage. I did a sample print after that and it seems to be working fine, I'll make sure it won't happen again!

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 6:06 pm
by Mark the Greater
I may well be wrong here, but I think the field would just slip if the force applied was too great.

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 6:31 pm
by jimc
It does no damage at all. There is no connection between the all thread shaft and the stepper. The all thread just has the motor's rotor loctited onto the end. The rotor makes no connection to the outer case or windings of the motor at all. The noise is just the magnets slipping

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 6:50 pm
by Jules
Then there's this, which i highly recommend in PETG:

http://www.thingiverse.com/thing:615104

:D

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 7:54 pm
by DrRobot
Jules wrote:Then there's this, which i highly recommend in PETG:

http://www.thingiverse.com/thing:615104

:D
Nice! now the machine can print something to fix itself :D Thanks for all the replies!

Re: Question about Z stepper motor

Posted: Wed Aug 19, 2015 11:43 pm
by jsc
Check out the remix from that print, too. Tim made a nice one that snaps on.

Re: Question about Z stepper motor

Posted: Thu Aug 20, 2015 12:56 am
by Matt_Sharkey
DrRobot wrote: Nice! now the machine can print something to fix itself :D
5QdBVLe.jpg
5QdBVLe.jpg (45.2 KiB) Viewed 9463 times
Heres a few to get you started:

Tool Holder: http://www.thingiverse.com/thing:132171
Fan Duct: http://www.thingiverse.com/thing:714000
Z holder: http://www.thingiverse.com/thing:53886
Z hardstop: http://www.thingiverse.com/thing:54014
Longer filament guide: http://www.thingiverse.com/thing:63487
Extended spool holde: http://www.thingiverse.com/thing:254796
Corner clamps: http://www.thingiverse.com/thing:602194
All of the M2 Printed parts: https://github.com/MakerGear/M2/tree/ma ... 0Parts/STL