Jeffs555 beat me to the punch. You can run the motors with a bipolar drive and use only the outer taps of the center-tapped coils. Total winding resistance is then double the unipolar rating, which is measured from the center tap to the end of the winding.
Double the resistance and you halve the current, so you would peak out at 5.5 amps. Now you could run a Geckodrive wide open-they are good for seven amps. You would absolutely need a heatsink though.
I meantion the Geckos because they are what I have experience with. I might be biased, but I really like them.
I found it cheaper to build independant supplies-one per drive-than to build a "welding machine". |