Hello,

It is my understanding that the step pulses generated by Mesa cards are always 
the minimum pulse length set by for example hm2_5i25.0.stepgen.00.steplen, only 
the space between the pulses is varied by the step rate, is that correct?

I was reading the manual for the new drive I was planning to use in my next 
build and see that the drive calls a preference of a 50% duty cycle for step 
pulse inputs.  I am guessing that it may have something to do with how the 
drive's pulse filtering system works, such that for maximum noise filtering and 
step reliability having the pulse length be approximately equal to the step 
spacing gives the best results.

So my questions are;  Would it be possible to make a Mesa card output a 50% 
duty cycle step pattern instead of the current default pattern?  And would 
doing this even be worth the effort?

Todd Zuercher
P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031


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