Stepper Motors and Holding torque

I was going to purchase this kysan motor for my Wade's extruder and it is pretty cheap, so is there any reason not to get 3 more of the same kind for the axes? Maybe to save energy I could get 3 of these motors . Is there an optimal rating for voltage, current, resistance, inductance(how does this affect anything?), or is it steps and holding torque that matter most? I'm going to be using pololu stepper drivers.

The first motor's optimal (And maximum) drive voltage would be 70V, but this mainly affects the top end speed which an extruder wouldn't really need. I wouldn't advise it for an axis motor, especially when using lead screws.

The formula for the maximum voltage is as follows:
= 32 * Sqrt()

This affects the high speed torque and for this, the lower the inductance the better.

This does however mean that for a motor of low inductance to have a higher low speed torque, more current is required. This is a trade-off between the maximum voltage of your Pololus (Or 12V, if you're using a 12V supply) and the maximum current they can provide.

See this page: [www.geckodrive.com]

Awesome, thank you very much; and thanks for the fast response.