Darrell,
On my EMC install I can get up to 80 ipm or so and that is WAY beyond the
instantaneous move capability of my steppers. I am running the freqmod setup
on an AMD K6 500.
If you are running the older steppermod or are running freqmod on a slow
machine you will poop out at a slower rate, but 20 ipm seems like you have
something else going on or require a very high number of steps per inch.
Tim
[Denver, CO]
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----- Original Message -----
From: Darrell <dgehlsen@...>
To: <CAD_CAM_EDM_DRO@...>
Sent: Thursday, May 04, 2000 11:57 AM
Subject: Re: [CAD_CAM_EDM_DRO] Conversational Programming and NAMES- very
long!
Jon, What you say may be true for servo but not for steppers. To make
steppers work properly we need something past the Linux box to create smooth
step pulses. The problem with EMC and steppers now is that the pulse train
is ragged and you reach a point at about 20 IPM where the jitter on the
pulse train exceeds the instantaneous move capability of the stepper motor
and it stalls.
Darrell
