Re: [CAD_CAM_EDM_DRO] CPU

Gene wrote:

> What would be an optimum CPU speed for running EMC?

it depends. For servos (real servos with a DAC for velocity command)
a 100 MHz Pentium is plenty.

For steppers, you need more CPU, and it depends on how many steps
per second you need as to how much CPU is required to keep up
with it. A general consensus has been that 266 MHz is minimal for
steppermod.o (which gives somewhat jittery step pulses) and that
maybe a 333 or 450 is right for freqmod. If you use my external
step rate generator, then 100 MHz is also good enough for steppers.
This looks pretty much like a servo system as far as the CPU is
concerned. But, for direct step pulse generation, you need more
CPU cycles. If you have a high belt reduction ratio on your steppers
or have a high microstepping multiplier ratio, you might have to
bump these numbers up a little.

Jon