Re: [CAD_CAM_EDM_DRO] Opinions on this Chopper drive schematic?

ghidera2000 wrote:

>Found a PDF with a nice clear description of how to build a chopper
>drive circuit. http://www.kevinro.com/chpdrv.pdf.
>
>Anything bad about this one or a feature missing that you'd consider
>fairly important?
>
>I know I can buy drivers from Gecko etc (probably for less money in
>the end-game), but thats not the point. Its a hobby, I'm supposed to
>blow money, break parts, and have a good time :D
>
>

This is a 2 A 40 V full- or half-step driver. Pretty primitive.

The Gecko 201A drive is a microstepping, 7 A, 80 V drive with optoisolated
inputs. The Gecko 210 adds pulse multiplying, in case your computer can't
output step pulses fast enough. It has electronic damping of midband
resonance, which is worth a LOT. You won't have resonance issues
with the Gecko drive. A half-step drive will likely have resonance
problems at some speeds.

Jon