[Paul Copioli]

Nic,

Judging from your response, I think I may have come across rude. That was not my intention. When I see people posting things advocating breaking the rules (not your post, but one of the responses) I tend to get a little hot under the collar. Not directed at your post. To specifically answer your question, we have found the best workaround is to use that motor in applications only where the backlash will not hurt you. We tend to use it for lifts, or extensions, or winches. The anti-backdriving capability of those motors is awesome, so we try to use it to our advantage. Modifying the motor is just not allowed within the rules.

I know you don't want to argue the point, but I just can't help myself. The seal drag and other resistive forces are nothing compared to the weight of the window. Even though the window is going down, gravity is still acting on the motor (just helping). The motor's backdriving resisistance (or the linkages' backdriving ability) allows the window to stay up when the motor is off. The second the motor starts to move, the backdriving ability of the worm is greatly reduced (sliding friction vs. static friction) and gravity actually pulls the window down and the motor just controls the fall. The motor doesn't actually pull the window down. Now I know all windows don't operate this way (actually my truck has a very small motor with no backdriving resistance and a huge spring and linkage mechanism), but this is what I meant by always gravity loaded. Gravity is always on.