To good to be true?

[TheLostAmish]

I found this link for a stepper controller:

http://electronics-diy.com/stepper_motors.php

Would that design actually work? All the other ones I've seen are a lot more complicated. If the design would work, does anyone know how well it would work?

[nophead00]

Yes it will work for small unipolar motors.

However, bipolar motors are more efficient and a constant current chopper drive with a high voltage supply and low voltage motor will be able to go a lot faster than a constant voltage drive.

[TheLostAmish]

Would that circuit be enough to power a CNC designed to cut circuit boards?

[nophead00]

Originally Posted by TheLostAmish Would that circuit be enough to power a CNC designed to cut circuit boards?

Yes I think it would just about do that. Depending on your lead screw pitch it may be a little slow but I am sure it could be functional with the right motors.

They need to take no more than 0.5A per coil at the supply voltage you use.

[TheLostAmish]

Does anyone know any good motors that would work with that circuit. Im really new to the CNC world, but eager to learn I guess

Also, would it be possible to use a larger motor, say 1A, if you were to put a resister somewhere between pin 9 of the microchip and the power line

[nophead00]

Originally Posted by TheLostAmish Also, would it be possible to use a larger motor, say 1A, if you were to put a resister somewhere between pin 9 of the microchip and the power line

No you would need a more powerful chip.