Re: following error question

[Ray Henry <rehenry-at-up.net>]

Richard

smdromod.o is very close to freqmod.o.  It generates output pulses using 
a set of routines just like freqmod so in the commanded part of motion 
they are the same.  The difference is that freqmod counts each pulse that 
it sends as a distance traveled and returns those values to the motion 
process.  Smdromod looks elsewhere for a pulse that says that an axis has 
moved and determines the distance traveled independent of the pulses sent 
to a motor.

The most common application of smdromod is to confirm stepper motion 
using encoders and a Kulaga/Mauch dro card.  This way, if a stepper 
looses pulses, smdromod will report that to the motion controller and it 
will attempt to make them up.  Some time back there were several posts 
about the way that the motion stuff made that attempt.  I believe that it 
just speeds up the pulse train and that may be just the opposite of what 
is needed when a stepper is loosing steps.

Ray



On Thursday 03 October 2002 10:31 am, Richard wrote in response to Dale:
<s>
> Ok, now I am getting confused.  What is smdromod?  It sounds like that
> actually performs better than steppermod or freqmod.  What are the ups
> and downs of using smdromod?
>
> Richard