RE: [CAD_CAM_EDM_DRO] study, study, study

> Okay, but you should know that part of the reason
> I'm so screwed right now is that I used the BDI.
> Don't get me wrong, it works great~!
> And is the perfect solution for someone like me who
> wants to start making movements and parts in a hurry.
> But I think I lost out on having to learn a lot of technique
> and technical by using it. Double edged sword there.

You only think that is the reason. You would have been considerable more
screwed up if you had to get the real time patch to apply and compile a new
kernel.

> So, do you just edit these ini's like in windows,
> inserting which one to use, and then saving the file?

Yes

> > steppermod.o : the original stepper module. Problems with pulse pacing.
> > Works great for step and direction servos and steppers with a
> pulse buffer
> > like the G210 Gecko drives.
>
> What kind of problems?

Limited rapid rates, resonance, stalling steppers.

> > freqmod.o : An updated stepper module. Much improved pulse
> spacing (still
> > not as good as a dedicated external generator //Hint, hint
> Jon//). Pretty
> > heavy overhead on the computer which tends to limit maximum step rate.
>
> How heavy a load on the 'puter?
> Right now, I'm running and AMD K6-2 400Mhz with 256Mb Ram.
> You say not as good as an external generator.
> So EMC is generating the step and direction pulses?
> How would you use EMC if something else was generating them?

That computer should be good to about 25000 steps per second if you get all
the parameters tuned right. If you are running a microstep drive and a high
reduction this may not be fast enough, but is likely fine for most setups.

Not only is EMC generating the step and direction pulse, but it is running a
programmed pulse task in freqmod.o that sets the base timing all the steps
are generated from. That is where the heavy overhead comes from.

Jon Elson has designed an external pulse generator and is working with some
others to create a motion module that will drive it.

> > smdromod.o : a modified version of freqmod.o that uses actual encoder
> > feedback through a Mauch/Kulaga DRO card for closed loop stepper
> operation.
>
> I'll hafta learn more about this after, I suppose.
> Baby steps... (or is that a half-step?)

microsteps

> > emcmotsim : A simulator version
>
> Sim for what?

Seeing the display numbers move without having the realtime kernel.

Tim
[Denver, CO]

> > I think there is actually another servo version for the version 2 STG
> card.
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/