Quote:
Originally Posted by sciencenerd
My question is: does anyone have an idea of what kind of torque requirements a stepper motor would have to have to drive those stages (particularly the bottom one)?
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I'm not sure what the current drive capacity of your stepper drive is... however, a cheap source for stepper motors is
AutomationDirect who has stepper motors ranging from a NEMA17 framesize with 83oz-in of torque at just $19, to a NEMA34 framesize with 434oz-in of torque for (a still amazingly low price for the motor) $99.
If you need drives, they have a 3.5A/phase microstepping (to 10,000steps/rev) drive for $150. The drives can run off anywhere from 12 to 42VDC... so finding a powersupply suitable shouldnt be too bad.
Hope that helps... if more questions, just post.
-q