Be careful sizing your steppers. The biggest drawback to designing with
steppers is that if you exceed their available torque they'll quietly
fail, and your system will do Very Bad Things. So you want to
over-specify your stepper motors by quite a bit.


Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

There is a way around the initial high torque, like friction loads etc. You
can use torsion spring/shaft to delay the application of torque to the step
motor. Had that problem back at IBM and solved it with torsion shaft spring
(Allen key), had invention disclosure on it and it was the only way to get
around the problem due to limited space/size of the motor.

Yuri K3BU.us
www.computeradio.us