Martin
They still may be a type of step and direction drive card, or they may 
just be the amplifiers. Choppers are a type of drive for Steppers. How 
much info do you have on the cards. If we could get more information we 
could give more help. Do you know the specs on your power supply. What 
about the winding resistance on your motors. What is the physical size 
of the motors. Any information along these lines would help although 
somebody on this list may already more familiar with "Chop2 drive cards" 
and Centroid controller. EMC2 can be configured to drive Servo's of 
various types and Steppers the trick is determining which electronic 
hardware components to plug in between the computer and the motor. Then 
again how old is old.

Hubert

Martin Pinkston wrote:
> Good afternoon group.
> Well, my project (converting and old Centroid controller over to EMC2) has
> hit a very large bump in the road. At least for me it's large. Apparently
> the drive cards which I assumed were step and directions drive cards, are
> not. They are Chop2 drive cards.
> So now, I either put the unit back together and forget about the conversion;
> come up with some 4 signal to 3 signal interface, or switch out the drive
> cards and find a drive card that will interface with the C10 to the motors.
> I have an e-mail out to Centroid to see if these motors are stepper motors
> or chop motors. So far what I can find on the internet show that they are
> stepper motors.
> Thanks,
> Martin
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