RE: [CAD_CAM_EDM_DRO] Uni vs. Bi - polar stepper in router

Ron,

Bipolar/Unipolar & Chopper/non-Chopper are not commingled terms.

Bipolar/Unipolar refers to the way a motors coils are connected to the
current source and energized.

Chopper/non-Chopper refers to the way the current is controlled.

I have put together a number of breadboard projects using a non-chopper
bipolar driver and there is absolutely no reason you couldn't build a
chopper unipolar driver. The reason you usually see chopper and bipolar
associated is that they are both the more current method of building a
stepper driver.

With that said, I would say to look to a bipolar chopper as it is going to
give you the best power and speed.

Tim
[Denver, CO]

> Is the use of Unipolar steppers very common in cnc router table
> designs, particularly in routers of the home variety? Or, do most
> use a Bipolar chopper for the efficiency and power?
>
> Thanks, Ron