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35kHz slowdown, bugs


 

Art and list-at-large:
I am experiencing a slow down in performance at 35kHz (and incredible slow
down at 45kHz) in Mach 2 as compared to 25kHz. Can someone tell me what is
happening and how to remedy the situation. Running a 1.3 GHz machine
dedicated to Mach2 - nothing else running, use of Gecko 201's, and only
rapids of about 10mm/sec.
Also a couple of possible bugs:
- upon M30 reset, rewind all axes ok except X that does not reset properly
- variable speed of incremental jog, sometimes slow, sometimes same speed
as continuous.
Thanks in advance.

Tom Hess


Art
 

Hi Tom:

I don't know whats causing the slowdown, check to make sure the pulse
width is not too high. If set to 0 or 1, the slowdown should not occur, if
set too high, this may cause that type of problem at higher speeds.

The incr. jog speed is at the current feedrate set.

I'll check out the X axis, you mean it doesn't reset in which way? to zero?
or the offsets do not remove?

Thanks,
Art
www.artofcnc.ca


 

Art:
Thanks for info. I think the offsets are not being removed from X axis on M30. It resets to a value equal to original position + (or -) last coded position.
Tom

Hi Tom:
I don't know whats causing the slowdown, check to make sure the
pulse
width is not too high. If set to 0 or 1, the slowdown should not
occur, if
set too high, this may cause that type of problem at higher speeds.
>The incr. jog speed is at the current feedrate set.

I'll check out the X axis, you mean it doesn't reset in which way? to
zero?
or the offsets do not remove?
Thanks,
Art
www.artofcnc.ca