you could try bracing the back of your arm and then (I dont know if this will help b/c i have never tried it) cut of as much metal off the top of the towers as possible and connect the gears with standoffs. after that you could add more bracing to the arm. The problem might be these standoffs though. try adding more maybe.
I don’t have a complex tray so I haven’t tried doing any of this.
Stand offs don’t really have the structural integrity that would make them reliable to hold heavy weights. You may want to attach a c channel to the gear and attach the arm that way or worst case, add more standoffs and rubber bands to the side of the lift not powered by the motor.
you should definitley band this lift, that will at least help the problem a little bit, and if you add 2 tiny bars beneath the 2 bar to make it a 4 bar you’ll be able to add more bracing. bracing the top and bottom of the lift can also help.
like @kmaster said, standoffs are not a great choice for attaching things that will experience high torque
I would also recommend trying to support the HS shaft your big gears are mounted on in more than just two places. This would help a lot with stability. Try to have the axle go all the way across the back of the bot and support it with vertical posts on both sides of where the arms are attached
I dont know how affective this would be but you could also also brace the arm with a vertical x-brace from top to down. That could fix the problem along with banding (which you should do anyways).
so you have a 12 tooth driving one of your gears and the other side is just kinda hanging there. you might want to add a 12 tooth to the other side as well. think of lifts like equations, whatever you do to one side you will probably want to do it to the other side as well.
Eh maybe. The problem is his lift is axles and gears are at an angle. Although I didn’t see the way his motor is. I personally run a powered axle though the entire back of my lift.