I need some build assistance from the community.

 I have been searching the Google forum for help with this subject to no avail. If anyone knows the answer I would very much like to receive e-mail on the subject.

I have removed Willie's right arm for a tune up. Some of the holes in the cylinder of his shoulder rotation gear have become elongated so there is/was a lot of slop in the motion when he raised his forearm by rotating the shoulder gear.  This was the result of overdriving his arm. I do not remember now the excatct souce of that.

  In order to get a full 180 degrees of motion from his shoulder I had to modify the square potentiometer mount by effectivly rotating the square hole by 90 degrees (cutting it out to the required shape with a square jewlers file).

  I can install the pot in the parts as built, but that will give me 90 degrees of motion behind the relaxed (zero), position and only 90 degrees forward. I believe that he should have a greater range of motion than that.

  Please do feel free to contact me with a solution if you have one.


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pscartozzi's picture

You can always design and

You can always design and print the pot holder for the correct orientation but you are then stuck with that. I recall seeing a user named Mayaway that posed a design on THingiverse that accepts the square pot and allows for adjustment via a rotating collar. Can't find it right now but I believe there is a solution to this out there. 

As another option you could purchase the round pots and use those. That will also allow for adjustability.

Perry

 

mickeylib's picture

Thingiverse

Mike,

Search in Thingiverse for "Inmoov square pot" I have printed out all of these and used them effectively.

Mickey Lib