Re: [CAD_CAM_EDM_DRO] Limit and Homing switches

Hi Drew,

No doubt! I can't remember who made the comment about the home code.
Maybe it was Nigel (njc?)! (They say the mind is the first thing to go,
and I can't remember what the second one was). No rush here, I don't
have a home on the Sherline. Yes, I think it might have been Nigel! I
intend to experiment with home and limit switches on the PCB router,
'tho.

The floppy boot removes the other programs, and made a HUGE improvement
on my development system. I know about hidden and system files all
right, but on the "shop" system (Boots EMC's LILO, and then it loads
Windoz98), the file does not seem to exist on (BDI built dual boot
machine)!

Current thinking is to REPLACE the timer ISR, and then NOBODY can chain
it but me! Then I suspect that TurboCNC or STEP4SD (me) will run better
under a DOS window, or MUCH better under a "MSDOS.SYS DOS boot". A
"shortcut" on the Desktop might then also have a better control on timer
(might make Windoz mad, 'tho!).

Alan KM6VV


Drew Rogge wrote:

>
> Hi Alan,
>
> Nope, I didn't write it either. I guess it came from the fertile mind
> of Mr. Kowalczyk. Sorry if i misled you. I could probably go in and
> hack it if I needed to though.
>
> FWIW, I also have a machine that seems to cause the step stream to
> become very ragged. I'm pretty sure I even tried booting to a DOS
> diskette
> but that didn't help. I came to the conclusion that it's something in
> the BIOS.
>
> One thing about the MSDOS.SYS file is that it has the "hidden" attribute
> bit set. This may be why you're not seeing it.
>
> Drew
>
> Alan Marconett KM6VV wrote:
> >
> > Hi Jerry,
> >
> > Actually, I was thinking that Drew might have written it from a previous
> > comment he made. I haven't looked at the code again to see or try it
> > out.
> >
> > I have edited MSDOS.SYS, and have been booting my development system as
> > you describe. That's why I was surprised to see the effects on the
> > pulses. Yes, if I'm really seeing the 18.2 ms timer "tick", and other
> > programs are riding on it, that could explain it. Now to figure out a
> > way to "cut out" the other programs. I'm thinking I'll just take over
> > the time tick ISR. I've wanted to do that anyway, and speed it up a
> > little.
> >
> > Nice boot menu. I've got one on another machine. But these
> > "freeloader" programs don't seem to be loaded by the CONFIG.SYS I see.
> >
> > And on my LINUX/W98 "shop" system, I can't even FIND the MSDOS.SYS!
> > LILO seems to replace or take it over! I'd LOVE to find on on that
> > machine!
> >
> > Alan KM6VV
> > P.S. We might like to add a CW/CCW output mode selection for steppers.
> > I have a couple of cw/ccw drivers (EMI medical), so I could probably
> > test it. BUT where's the time?
> >
>
> --
> Drew Rogge
> drew@...