RE: [CAD_CAM_EDM_DRO] EMC questions

You do not mention the voltage rating and current rating of the motors
nor how you have them wired (half coil, full coil, parallel coil, etc).
You are also not mentioning the voltage of your power supply. These can
all have profound influence on the maximum speed you can get.

In your configuration you have down an acceleration of 20. That is VERY
high. I run more in the 1 to 2 range. Regarding freqmod.o, it does not
output any pulses that my drivers react to when there is no motion being
commanded. Additionally, a PII 233 is marginal to get a good solid pulse
train out of EMC. You have to use freqmod.o to get max speed and then it
needs a faster system. Steppermod.0 works great with the G3X0 drives and
with the G210 Gecko drives as theses drive are not tied directly to a
smooth pulse train, but any other stepper drive will do better on
freqmod.o. You may want to try either the demo of CNC Pro from Yeager
systems or my new favorite TurboCNC at www.dakeng.com to see how fast
you can get your system to go with the computer you are using.

Tim
[Denver, CO]
http://www.KTMarketing.com/CNC.html

> Hi, I am trying to configure EMC in order to get maximimun speed in
> rapids with my hardware.
> So on, this is my configuration Soft and Hard.
>
> Soft
> EMC 2.1.1.16, rtlinux-3.0 and Red Hat 6.2 (kernel 2.2.18),
> Kernel is patched and EMC is compiled without problems, It
> works well. PC is pentium II 233 with 32 Mgas de RAM
> Hard
> Chopper drivers with L297 L298 combo, wiht current idle
> reduction (SD1V1.2)
> Parallel interface DB1V1.2
> Hard was bougth from Deans Hobby CNC
> (http://plaza.powersurfr.com/deanc/)
>