Re: 201 Drivers and 42 Motors

John, sorry for not addressing your question. Though it is a good
idea, it is not practical to do what you suggest. A step motor drive
needs to sense phase current. An external amplifier will not provide
that function; it would need to be custom designed to do this. At
that point you may as well design a new drive from the ground up. All
the stuff would then be in one box instead of two.

Mariss

--- In CAD_CAM_EDM_DRO@egroups.com, machines@n... wrote:
> It must be the sign of a demented mind replying to one own post but
> we now have Mariss interested in building a larger 160v servo drive
> which is probably the best way to go.
> However as someone else posted there are loads of older [read very
> cheap ]machines out there still on type 42 stepper motors in good
> condition just looking for drivers.
> As this list has some very experianced people on it could we have a
> definitive answer as to whether a smaller stepper drive such as the
> 201 could run larger motors through an amplifier stage?
> This is one part of my original post quoted below that never got
> addressed.