Re: [CAD_CAM_EDM_DRO] Re: step and dir to servo

riet91@... wrote:

> Dear Peter,
> Ihave seen your post , I am in almost same trouble so please let me
> know if you got any solution
>
> Thanks and Regards
> Babar
>
> --- In CAD_CAM_EDM_DRO@y..., Peter Bailey <pbailey@...
> wrote:
> > Hi list,
> > I wonder if anyone has knowledge of an inexpensive
> > converter to go from a card with step and direction output
> > to a servo amps that takes analogue in. (6 axis)
> > The servos use resolvers and are brushless ac.

This is quite difficult. The computer has no knowledge of machine
position, only the converter box would know. Why don't you use a
program that is designed for servos? EMC and a few other PC
programs accept encoder feedback from the machine, and can send
the analog velocity command to the servo amps. (In the case of
the machine with resolvers, unless the servo amp does the conversion
from resolver to quadrature, you would need a resolver converter.
These are available, but may be expensive.

Jon