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dcb · 11-13-2009, 08:53 AM

re: saving the position, you would probably have to completely disengage the motor from the wheels while the controller is off for that to be remotely feasible. Otherwise I'm sure it would drift. And even then an occasional missed interrupt or something would cause drift as well.

I think you need a sensor that says "you are here!"
Edit: or at least a sensor that can tell you closely enough where you are so you can get things moving and then compute position based on rpm and the timing of gross sensor events (a-la 3 hall effect BLDC, crankshaft "position" sensor, etc).

11-13-2009, 08:53 AM	#57 (permalink)
dcb needs more cowbell Join Date: Feb 2008 Location: ÿ Posts: 5,038 pimp mobile - '81 suzuki gs 250 t 90 day: 96.29 mpg (US) schnitzel - '01 Volkswagen Golf TDI 90 day: 53.56 mpg (US) Thanks: 158 Thanked 269 Times in 212 Posts	re: saving the position, you would probably have to completely disengage the motor from the wheels while the controller is off for that to be remotely feasible. Otherwise I'm sure it would drift. And even then an occasional missed interrupt or something would cause drift as well. I think you need a sensor that says "you are here!" Edit: or at least a sensor that can tell you closely enough where you are so you can get things moving and then compute position based on rpm and the timing of gross sensor events (a-la 3 hall effect BLDC, crankshaft "position" sensor, etc). __________________ WINDMILLS DO NOT WORK THAT WAY!!! Last edited by dcb; 11-13-2009 at 09:46 AM..