Re: Re: Tuning EMC

(comments mixed in)

>    From: "mjf462001" <mjf462001@...>
> Subject: Re: Tuning EMC

<s>

> I am still having problems with the MDI. I request a g91 x1. and the
> motor only moves between .100 and .200" (no following error though)

Is it possible that you have a version of the interpreter that needs a g20 in
order to switch into inch mode when it starts up?

> I don't use steppermod because it couldn't handle the input output
> resolution of 10,000 (250 cpr, 2:1 belt reduction, 5 tpi leadscrew)
> (the computer is really sluggish even the mouse moved really slow)

Am I missing something here? (250 * 2 * 5 = 2500)

When steppermod is started bin size is computed from max_velocity and
Input_scale. Normally steppermod is either a go or no-go kind of animal.
If it goes, it works fine. If it doesn't it will cause major problems
including reboot or BSOD (Black screen of death) because of a buffer overrun
in the real-time shared memory. Lower either value and it should go. BTW --
I have seen these kind of crashes trash the system and require a reload
'cause it just won't run right again.

> my motors seem to
> starve for input when I ask for more than 35 imp of max velocity.

This sounds like freqmod rather than steppermod? It could also be a problem
with the setup of your PC. You might want to look at bogomips. They aren't
very meaningful but the value should be at least 2x the speed of your
processor.

HTH

Ray