Welcome! Log In Create A New Profile

Advanced

100:1 Geared nema 17 wont turn

Posted by gmh39 
100:1 Geared nema 17 wont turn
September 24, 2014 09:34AM
I'm designing an extruder with a 100:1 NEMA 17 motor. When I went to test the motor yesterday it it wouldn't turn

I took the gear box off and the motor itself would turn, but the gearbox wouldnt. When I dismantled the gearbox, I didn't find anything unusual, so I'm kinda stumped why it won't turn.

I'm using a RAMPS board with DRV8825 drivers. Here's the motor I'm using:

[www.omc-stepperonline.com]

Any ideas?

Edited 1 time(s). Last edit at 09/24/2014 09:34AM by gmh39.


greghoge.com

HUGE 3D PRINTER PARTS SALE!!!
Re: 100:1 Geared nema 17 wont turn
September 25, 2014 06:17AM
If the motor its self turns, it's definitely not an electronics problem.


Generation 7 Electronics Teacup Firmware RepRap DIY
     
Re: 100:1 Geared nema 17 wont turn
September 25, 2014 08:45AM
Yea I know. Just thought I should put what board Im using in case it might be a factor.

Anyway, the gear box should be able to be turned by hand, right? Or am I getting my gear ratios backwards?


greghoge.com

HUGE 3D PRINTER PARTS SALE!!!
Re: 100:1 Geared nema 17 wont turn
September 25, 2014 07:20PM
If you try to turn the gearbox backwards, then ofc you get the gear ratio backwards. If that friction would make it able to turn by hand or not, dunno, but at 1:100 probably not. Try moving it the normal direction, forward way, at 100:1 and that way should turn.

I have had two cases of stuck gear boxes, in both cases some teeth parts splintered and got stuck in the other teeths and froze the whole assembly. I guess thats a common fail mode. If it is *really* stuck you might need to dismante and clean it. But probably that is not the case.
Re: 100:1 Geared nema 17 wont turn
September 25, 2014 08:12PM
Hi gmh39,

Please confirm if the the gearbox shaft really not run?
Because the gear ratio 100:1 is very big, when stepper motor's shaft run at low speed, the gearbox shaft might can not see it move, seems like static.
For example, stepper motor run at 100rpm, the gearbox will only run 1rpm.
Please try to accelerate the speed, and see what's result?
Re: 100:1 Geared nema 17 wont turn
September 27, 2014 10:54PM
Got it working. Thanks guys. I had to up the steps/mm a whole lot to get any sort of movement.


greghoge.com

HUGE 3D PRINTER PARTS SALE!!!
Re: 100:1 Geared nema 17 wont turn
April 25, 2024 05:40AM
Can you use this one? i find it similar to yours;
https://www.oyostepper.it/goods-304-Motore-passo-passo-Nema-17-bipolare-L%3D48mm-44Ncm-0018-gradi-168A-28V-con-riduttore-epicicloidale-100-1.html

Edited 1 time(s). Last edit at 04/25/2024 05:40AM by maogeken.
VDX
Re: 100:1 Geared nema 17 wont turn
April 25, 2024 07:03AM
@maogeken -- you're added to the "eventually SEO-spammers" list - any more similar posts will remove the "eventually" eye rolling smiley


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
Sorry, only registered users may post in this forum.

Click here to login