Re: new servo motor controller

Roger, not following you exactly. I have been running a motor with a
2000 line encoder (8000 in quadrature) using EMC3. The Pixie has a
built in step multiplier, that I set to x4 and run EMC at 48khz step
rate. I then get about 200,000 steps/sec, or on my machine, where I
run 40,000 steps per inch, that is 240 IPM.

Maybe you didn't see the built in step mulitply option in the Pixie?

And with the Grex, everyone will soon be doing 4 million steps/sec :-)


Rick

>
> Rick,
> Looks good except for the 2000 line encoder with no prescaler or
> multiplier. My machine has 1000 line encoders on servos and requires
> 20,000 steps per inch. With a 2000 line encoder that is 40,000 steps
> per inch. It is difficult to generate 120 IPM step rates at this

count

> from a PC. My 6,000 RPM spindle driven by step/dir (for eventual

rigid

> tapping) would almost need radio frequencies.
>
> Roger
>