Stepper Motor for High Torque Application
Stepper Motor for High Torque Application
(OP)
We have a small stepper motor that is rated for ~84 in-oz and a load for it to drive, however slowly, of somewhere less than ~10 ft-lbs (~2000 in-oz). Splicing in a gearbox with a better than 1:25 ratio seems to be the best option, but the first one we tried (at 1:48) just couldn't handle the torque. I've hunted down a couple gearheads on the net that claim better than 1:50, but I know sufficiently little about stepper motors to know if we're going about this the right way. I need a cost effective solution to driving the 10ft-lb load repeatedly from a dead stop and we'd like to keep the control interface we have with the small stepper. Any help is appreciated. Thanks.





RE: Stepper Motor for High Torque Application
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Stepper Motor for High Torque Application
http://www.cgimotion.com/
RE: Stepper Motor for High Torque Application
http://www.harmonicdrive.net/
RE: Stepper Motor for High Torque Application
I've had good results with timing belt drives and steppers, mostly in 1/5" pitch. I don't care for the really tiny pitches.
Depending on your geometry, you may be able to get 25:1 in one pass with timing belts. One trick; you don't need a full complement of teeth on the big 'sprocket'. Two or three isolated teeth sticking out of a 'minor diameter' drum will work just fine.
Mike Halloran
Pembroke Pines, FL, USA