Re: [CAD_CAM_EDM_DRO] Closed Loop PC Based CNC

nitewatchman5 wrote:

>There are several interesting controllers on the market such as the
>Galil, Delta Tau and Servo to Go. The Galil especially looks very
>powerful and is sometimes found on eBay for a reasonable price. The
>big question however is the Front-End software to drive the
>controller, does for example EMC support these controllers?
>
>

EMC does support the Servo to Go. I don't believe there is any support
for the Delta Tau or Galil.

You might want to take a look at my PWM servo controller, which is pretty
cost effective, even compared to eBay prices on the above units. I also
have
PWM servo amps for brush motors. I really wouldn't woory about the
longevity of brushes on a modest-sized machine like a bench mill. You can
likely run it for ten years at the speeds that would be appropriate in this
case. See http://jelinux.pico-systems.com/univpwm.html and
http://jelinux.pico-systems.com/pwmbox.html for more info and pictures.

>Advice would be appreciated, practical experience perferred -
>theoretical suggestion catalogued. If we can find no other solution we
>will refit the machine with a Fagor 8025M control.
>
>

I've been using EMC on a Bridgeport retrofit since 1998. I have never
had an
axis shift on me without it being operator error. It is using DC brush
servo
motors, and has been absolutely reliable. (It uses an earlier version
of the
PWM servo amplifier with analog inputs.)

Jon