I’m working on a fun variant of solo12, (which is actually more different than similar by now), but uses roughly the same actuator design. Unfortunately due to various modifications etc. the weight of my robot is quite a bit higher (I still need to measure it properly, but a little more than double solo8. Maybe 4kg?).
Due to this the current drawn by my motors when standing is in the range of 7A, which is way too high without any form of active cooling. Brief tests suggested that even 5A continuous is too much for PLA-based modules after 3 minutes, but I think switching to a better material won’t be enough for 7A. Not to mention that this means that if a motor takes on extra weight for some reason it will very quickly burn the phase wires.
Just wondering if anyone has had any success with adding fans/alternative active cooling, or measured any heat transfer properties of the motors (specifically, h, the heat transfer coefficient), so I can calculate what kind of fan I should need.
Alternatively if anyone has made an upgrade with more powerful knee motors, or a 1:16 gear ratio rather than 1:9 that I could check out?