Wobble Ring Stepping Motor v2 SV

by Ndrew, published

Wobble Ring Stepping Motor v2 SV by Ndrew Mar 2, 2013


This is the Solenoid Version (SV) of my Wobble Ring Stepping Motor, parametric for different solenoid sizes. I have uploaded files for solenoid.stl, solenoidLink.stl and solenoidTop.stl to fit these:

This thing is the sister to this:

This thing is the successor to this:

And uses sgcg's fastener library

Also uses mechadense's epi-hypocycloids from:

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Wow that should have been obvious to me. I guess the it's getting late :p. I guess the easy fix would be to set the hole_radius to 0 and just let the opening_width form the gap. The reason I used these dimensions was because they were used in the library's code, so I assumed they were closer to workable than anything I could come up with without testing. At this point I think I should get some sleep. Just about useless this late :(

Both. The shaft_radius and hole_radius had a difference of 0.5mm, and in both the horizontal and vertical cases there were gaps. A small part of the pins on the solenoid brackets still printed, but not to the point they would be usable. The wobble ring though would have printed no supporting layers, and then tried to print the top of the pin in midair. I had already printed the solenoid brackets and saw first hand the result, I caught the wobble ring flaw before starting the print there

Just curious though, were exactly are the pins that thin? Is that for horizontal or vertical printing?

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All parts are oriented for printing without support.

Print 1 each of the following:

Print 3 of each for the following:

Insert your solenoids shaft first into the "solenoid" parts. Attach the shafts to the "solenoidLink" parts, leaving 3 mm of shaft exposed.

All pieces snap together downward from were they are seen in the exploded view.


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Ndrew on Mar 21, 2013 said:

They are side dimensions (the shorter two) of your solenoid. They should be defined at the top of the file and passed through the to the solenoidTop() module. Are you using the commented out code for exporting?

AphoticJezter on Mar 21, 2013 said:

I see solenoidLength and solenoidWidth at the top, there is no definition for sl and sw except as arguments to the solenoidTop module. I can see them used in the solenoid module too though, even though they aren't defined there.

AphoticJezter on Mar 21, 2013 said:

I'm trying it now... what are sl and sw?

AphoticJezter on Mar 7, 2013 said:

I managed to get some of those solenoids back. I'll have to give this a try!

Ndrew on Mar 7, 2013 said:

I should mention that you might want to add .5 to your solenoid dimensions for clearance. Good luck!