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Old 11-24-2015, 04:49 PM
SteinHDan SteinHDan is offline
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Join Date: Sep 2015
Location: Oslo, Norway
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Default Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi Lil Giants!

I love your threads and builds!

Thanks for the link to the Fumotec cylinders. Those look very nice and very suitable for this model.

I'm going to control the force of the electric motors by current limiting. I'm using the Monster Motor Shield for Arduino (a cheap way to get the same driver chips as the Pololu quik controller), and I'm planning on doing it mostly the same way that this guy does:
- https://www.youtube.com/watch?v=7sr93cD--tg

Lots of options on the behavior. Cut off right away, exponential backoff, constant current (force), or more advanced like keep the current for a while and then back off. We'll see what works better.


Stein :-)
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