Re: [CAD_CAM_EDM_DRO] GE 1050CM control

Harlan Gustafson wrote:

> Jon
> I'm not sure about whether it would go 250 ipm (not fpm!!) in 4-axis
> simultaneous but that would be my minimum requirement. Everybody so far
> "thinks" it will but I'd like to hear a more definite answer from someone
> who really knows. As for the the tapes, the executive stays the same and
> you edit/change the MSD tape to suit the machine. The MSD is in readable
> code not binary and the programming is explained in the GE handbook.

If you have documents that describe the system's operation, see what the
servo update rate is. If it is 60 or 100 Hz, I would just consider it obsolete,
and move up to something newer. You CAN obtain high velocities with such
a system, but the following error will get really large. if you try to crank up
gain, and also have fast acceleration, the system will have to get unstable.
I run EMC with a 1 KHz update rate, and really would not want to go much
below that.

Just judging from the capacity of 1980 minicomputers, I would be pretty
sure it doesn't have a servo update rate much better than my A-B 7320's
100 Hz.

Jon