NEMA 17 Stepper Mount

by ElectronicKit Dec 31, 2010
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Hi, what CAD are you using in the picture?

I use LightWave 9.2. Not the easiest 3D CAD software, or the cheapest, but it was what I could learn after trying to use Blender.

Had three of these with 25% infill using abs, nice and solid and the mounting holes with M3 screws gives you a little play to adjust position, think these are almost perfect. did not use any washers when they are mounted to the 80/20 1010 frame i will use washers and maybe install a fiber gasket between the frame and the motor. since some seem to think there may be some noise, they seem to be well designed, mounted mine with 10/32 screws and T-tabs (think this will work very nice) thank for providing the design,

if you make the motor stick out slightly you can have it tensioned against the tslot which would reduce vibration and also act as a heatsink.

If you just 'biased' cleaning out the 4 motor mounting holes toward the base, or used a 3/16th drill bit for cleaning out the holes, the motor would touch the aluminum T-slot. The motor is so close to the T-slot with this existing mount, that you almost have to be careful if you do not want it to touch. I should try what you suggest just to see if noise is reduced or increased. The motor heatsinking would be improved for sure.

you could even just shim in some pennies haha, or copper sheet.

In the top view, the layers in the printed black object look almost identical to the stack of black iron laminates in the motor! Like you meant to do that!

This looks like a very useful object in the Thingiverse. Thanks!

Thank you for the feedback - I had not noticed the iron laminate look produced by the base interface layer.

Can't quite tell, but is the motor actually in contact (or nearly) with the beam?

I'm thinking one could lessen the possibility of rattle and vibration noises by making sure there's no metal-metal contact there. Having the lower plastic beam travel under the motor, and shifting the rest of the housing away from the metal beam by that amount.

It could be done with just a gap as

Regardless, looks like a good print!

Hard to tell from my photos, but there is a .03" (.76mm) space between the motor housing and the 80/20 frame surface. The motor is mounted on the frame here, but I have not fired up the prototype to get an idea of noise. There is enough play in the motor mounting holes to actually put the motor into conatact with the aluminum beam. At this point, I don't know if that is a good thing or not for vibration and/or noise.

Thanks for the note!

I would guess that this is worse for vibration, as you won't have the mass of the frame to dampen things out. You could end up with the stepper vibration just being enough to have the frame and motor housing hitting each other a bunch.

On another note, a nice v1.1 for this part would be to make your M6 holes teardrop-shaped so those without support material won't have to clean up the holes.

I see you printed one - always neat to see other people's 3D print.

By plugging in the motor mounted to my 80/20 prototype, I was able to sort of compare noise/vibration and it seems OK. That is sure to change as I add more parts - like the weight of the Z-platform loaded with a plastruder!

Can you point me to an object on Thingiverse that has a teardrop hole?
I printed this version without support material on a MakerBot and the base mounting holes came out OK (after X-acto cleaning). If there's an easier way, I will try it out.

Nice job, this looks pretty useful!

Thanks for the feedback! The part works great for this application.