🚀 go-pugleaf

I've got some questions on micro-stepping
a stepper motor.

First, how is it accomplished?  My first guess
is that you would step the current in the active phase
down a little bit as you stepped up the current in
the next phase.  This would make the armature sit
rotationally between the two phases.  Is this right?

If so, is there a linear relationship between the current
in the two phases and the rotational position?  I.e.,
if I applied 2/3 the current to phase A and 1/3 the current
to phase B, would the armature sit 1/3 step away from A?
If not, I guess I would have to use some kind of rotational
feedback.

Any good suggestions for micro-stepping controllers
(chips, hybrids, board level)?

Thanks,

-mark