You might try non-slip drawer liner. Something like that is usually available at most hardware stores. It can be cut into appropriate sized strips and glued around your wheels.
See: http://www.google.com/products?q=non+slip+liner&btnG=Search+Products&show=dd
For best results, test several...
Here are a few calculations to help you spec an appropriate motor to build your actuator.
Assumptions:
1. Worst case is accelerating from stop at position 0 to max speed at midpoint, and decelerating to stop at position 0.3m.
2. Average speed must be at least 0.4m/s.
3. Assume constant...
Transformers convert AC to AC. They are quite efficient so typical calculations assume power in = power out.
In other words: Volts_in*Amps_in = Volts_out*Amps_out.
Rearranging gives: Amps_in = Amps_out*Volts_out/Volts_in
Assuming your output is 24V AC (not DC), once you determine the total...
I believe there is no set gear ratio below which a worm drive will backdrive. The "backdriveability" depends on the worm diameter and pitch. It is only loosely related to the gear ratio since higher ratios tend to use finer pitch worms. Just as with leadscrews, the coarser the pitch and the...
