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  • Author Author: dougw
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Make Life Accessible - Clear Walk - Drive Train - blog 11

dougw

Still plugging away at getting the gear box aligned with the motor. I can sometimes get them lined up pretty well, but every time I make a tweak to try to improve it, it most often gets worse.

The video below shows significant misalignment, but it is useful to show what I am fighting.

The brass coupler I ordered a while ago finally came in so the connection to the gearbox is pretty clean. Also the aluminum sprocket for the gearbox arrived. It did not have a 6mm hole to fit the gearbox shaft, but I knew that when I ordered it (I bought this one because it was cheap) Fortunately it was very simple to drill the hole to the correct size, and the set screws still work perfectly.

The gearbox mount is bolted to the motor mount with large clearance holles, so it can be positioned vertically and horizontally to align the shafts. However this is a very touchy adjustment, being off by the thickness of a sheet of paper creates a large wobble. I expect I can get it aligned well enough to work - it only has to run for about 1 second every 10 minutes.

image

The video is uneditied - no titles, not great lighting, just letting the camera do its thing. I am curious to see how it shows up online. I believe the camera is set to record 4K video. Normally I convert it down to lower resolution, but this is a short video.

My brother finally convinced me to use a lapel mic with the camera (by giving me one), so the audio in the video should be a little better as well.

 

 

Relevant Links

MLA Design Challenge

 

The full set of Clear Walk project blogs can be found here:

Make Life Accessible

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  • Hi Douglas,

     

    Good update.

     

    I like the coupler and the gear reduction.  That should give you some good torque.

     

    DAB

  • in reply to DAB

    It definitely generates high torque - much more torque than I need, but that helps to keep the motor current low. The Kinetis Motor Suite allows the torque to be progammable and it can transition to torque control at a programmable speed, if desired. I don't need many of the programmable and externally triggered sequence features of the Kinetis Motor Suite, but it provides a powerful way to get the motor doing what you want it to do. Then the required code can be imported into a Kinetis Design Studio project.

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  • in reply to DAB

    It definitely generates high torque - much more torque than I need, but that helps to keep the motor current low. The Kinetis Motor Suite allows the torque to be progammable and it can transition to torque control at a programmable speed, if desired. I don't need many of the programmable and externally triggered sequence features of the Kinetis Motor Suite, but it provides a powerful way to get the motor doing what you want it to do. Then the required code can be imported into a Kinetis Design Studio project.

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