Re: Re: Old CNC controls

In a message dated 02/23/2000 7:49:58 AM Hawaiian Standard Time,
dfs@... writes:

<< What is the usual speed variation that can be acheived with one of
these controls? >>

Marc,
On my cnc hardinge, I can program from 50 to 3400 RPM. RPM variation
appears to be under +- 5 RPM at no load all across the range. Under load, I
can see it dip 15 to 30 RPM worst case. This with a generic 3 HP 3 ph motor
and a yaskawa 5 HP VFD. It is controlled by a Fagor cnc with a direction,
run, stop and 0-10 v speed connections. Power is 220 volt @ 20 amps.

Peter
THRD, Inc.