When the robot lifts, the arms end up like this
We’ve tried a stand off cross brace and now we have 2 c-channels going across the 2 arms with spacers screwed between the 2 bars to help stop flexing (which doesn’t seem to be helping).
The only time that we got it to lift evenly is when we used 2 motors (one on each arm). But we really do need 4 motor drive and I’ve seen robots with arms that work with just 1.
Someone please help, we’ve been at this issue for weeks.