Re: Taig mill, Taig controller, EMC setup?

It took writing a new stepping routine in emcmot.c. The X and Y axes are
working perfectly now, but I've still got a bit on the Z-axis going in the
wrong pin. As soon as I've got that worked out, I'll put the new emcmot.c
and my .ini file in the dropbox.

(But yeah, long term I'll build a translation board.)

Tom

On Thu, 17 Jan 2002, Tom Benedict wrote:

> More info. I read further on that web page, and found if STEPPING_TYPE=1,
> the pinouts look like:
>
> EMC Taig
> Func Func Pin
> M0-P1 2 X1
> M0-P2 3 X2
> M1-P1 4 X3
> M1-P2 5 X4
> M2-P1 6 Y1
> M2-P2 7 Y2
> M3-P1 8 Y3
> M3-P2 9 Y4
> M4-P1 1 Z1
> M4-P2 14 Z2
> M5-P1 16 Z3
> M5-P2 17 Z4
>
> While reading through emcmot.c, I ran across this:
>
> *======================================================================
> * lpg_phase_drive()
> * Routine to compute and output the phase drive bits needed by quadrature
> * phase stepper drive systems like the TMG (The Motion Group) electronics
> * package. The command input resides in the global array pdmult[] which
> * represents the number of cycles delay between phase changes. The
> * output is a global array stepperCount[] which is used as encoder feedback
> * to the servo loop controller. This routine
> * uses table lookup for the state transitions. This table and the output
> * definitions could easily be rearranged to directly drive a 3,4 or 5 phase
> * stepper system in low cost systems.
> * This code gets run if you set [emcmot] STEPPING_TYPE = 2 in your ini file.
> * The faster this routine executes, the shorter you will be able to set
> * your PERIOD parameter without locking up the computer and the better
> * speed resolution you will have with your stepper system.
> * Remember: this code has to execute in less than PERIOD seconds.
> * written 26-Oct-2000 by Lawrence P Glaister VE7IT lg@...
> *======================================================================
>
> This really makes me wonder if what I want has already been done. If not,
> it's darned close. I'm going to have to wait until later today to test
> this, though. My mill's at one location and I'm at the other. *sigh*
>
> (Lawrence, if you're reading this, let me know if I'm on the right track!)
>
> Tom
>
> On Thu, 17 Jan 2002, Tom Benedict wrote:
>
> >
> > I've got EMC up and running using BDI 2.11-01. It's working great, as far
> > as the computer goes. I can't get my mill happy with it, though.
> >
> > Right now EMCMOT is using steppermod.o. It looks like the pinouts for
> > this are:
> >
> > Pin Function
> > 2 X Dir
> > 3 X Clock
> > 4 Y Dir
> > 5 Y Clock
> > 6 Z Dir
> > 7 Z Clock
> >
> > Only problem is, the Taig motor controller isn't set up for
> > direction/pulse, it's set up for phase output:
> >
> > Pin
> > 2 X1
> > 3 X2
> > 4 X3
> > 5 X4
> > 6 Y1
> > 7 Y2
> > 8 Y3
> > 9 Y4
> > 1 Z1
> > 14 Z2
> > 16 Z3
> > 17 Z4
> >
> > Not really compatible...
> >
> > I saw some tantalizing information at:
> >
> > http://www.mindspring.com/~pitt/EMC/EMC_docs.html
> >
> > This seemed to imply that the pinouts for freqmod.o were quite different
> > from those for steppermod.o, and that the pinouts for freqmod.o could be
> > changed using this bit in emc.ini:
> >
> > [EMCMOT]
> > EMCMOT = freqmod.o
> > STEPPING_TYPE = 1
> >
> > Unfortunately, that's the only mention I've seen of the "STEPPING_TYPE"
> > parameter, so I haven't been able to find out if this will get me up and
> > running, or if different values for STEPPING_TYPE produce different
> > pinouts.
> >
> > To make a long story short, has anyone with a Taig mill, using the Taig
> > motor controller, been able to set up EMC so it's happy?
> >
> > I'm quite willing to start munging around in the code either to answer my
> > question or to patch it so it'll work. But if this has already been done,
> > I'd just as soon skip that part and get back to machining. ;)
> >
> > Thanks,
> >
> > Tom
> >
> >
> >
>
>

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