Camtronics

I was having a look on the Camtronics site and the 3 axis 2 amp Bipolar driver says it has provisions for adding the 4th axis. Is that the kit under it? I understand that a full step is one step between poles is it? And that a half step would be say, the half in the negative pole. Does Bipolar mean that it can chop the current on either of the poles? What would a microstep be? Question, questions, delays, delays. `.)

Thanks for any help,

John


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