Is there any exact motor Model we can refer to?
i found this PDF for those interested in Stepper Motor Basics
http://www.solarbotics.net/library/p...f/motorbas.pdf
Turning the problem in many ways... i'm still thinking of unsufficient current AND/OR voltage at the driver output. I would suggest you to use a higher voltage source, and connect the driver before the voltage regulator. If you have any variable voltage power supply that would be nice. This bring mvs_sarma's suggestion to the front. Make sense, there's probably some voltage loss at the output.
Why the previous driver circuit worked... well hard to tell, no schematic or pic of it (with some part# of the transistor/Mosfet)? Any coils or else fancy stuff on it?
Last edited by mister_e; - 28th March 2008 at 16:31.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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