When you start up LinxuCNC you can click on an ICON that takes you to the 
folder that has the .ini and .hal files.  I have 2 icons on the desktop, one 
for the parallel port version and one for the MESA 7i92H.  

For the last little while the MESA card has been sitting on the side and the PC 
parallel port cable goes to my BoB.  I can then dual boot into either LinuxCNC 
or WIN-XP/MACH3.

I'm holding off on a permanent solution until I get the spindle mounted.  I can 
do simple PWM to 10V analog with the single parallel port and the 7i92H can do 
that as can MACH3.

But while I can easily change those two pins, PWM and DIR, to be STEP and DIR 
under MACH3 there is no configuration file for the MESA that swaps a step 
generator into the pins allocated for PWM.  Hence the reason the MESA is 
sitting on the side.

The port P1 pins for the step generator on the MESA aren't available on my 
PMDX-126 BoB because the PMDX allocates those for their custom and proprietary 
expansion boards.  So if I want STEP/DIR with the MESA I have to build or add a 
second BoB that can interface to the spindle motor step/dir inputs.  With MACH3 
I can use either a Smooth Stepper or the parallel port and in both cases set 
the one pin to be PWM or STEP.  The Direction pin can remain unchanged. 

Anyway your .hal and .ini files will define your environment.  You get to 
choose which hardware pins, within the limitation of the hardware, do what.  So 
there's no reason you can't have your lathe and your mill wired up to the same 
MESA I/O interface.    You just can't run them at the same time.  And given how 
long some milling projects take I'm not sure I'd want to have my lathe disabled 
because milling project will take 2 hours.

I'll bet in no time at all you'd duplicate the hardware you have and have the 
two machines run independently.  What you can do is add a switch that shares, 
keyboard, mouse and display between two PCs.

John Dammeyer


> -----Original Message-----
> From: R C [mailto:cjv...@gmail.com]
> Sent: December-15-19 6:11 PM
> To: linuxcnc-users-list
> Subject: Re: [Emc-users] linuxcnc versions
> 
> I don't know if it is ok to post a screenshot here, but this is what I
> get to see in Debian (see attached).
> 
> 
> Also, in linuxcnc, can I use two different parallel ports and hook a
> mill up to one and a lathe to the orher and use
> 
> either one in linuxcnc (or does that mean I need to configurations,� one
> for each specific parallel port?)
> 
> 
> thanks,
> 
> 
> Ron
> 
> 
> 
> 
> 
> On 12/15/19 3:50 PM, Thomas D. Dean wrote:
> > On 12/15/19 11:53 AM, andy pugh wrote:
> >> On Sun, 15 Dec 2019 at 19:39, R C <cjv...@gmail.com> wrote:
> >>
> >>> That was� a couple of weeks ago, mayb even 2 months.
> >>>
> >>
> >> The Wheezy ISO was updated to reference the archive repository on the
> >> 24th
> >> of May. It sounds like your download was comfortably after that.
> >>
> >> So that seems to indicate that the repository fix did not work. Which is
> >> odd, as (and others) tested it.
> >>
> >
> > I downloaded� and installed ten days ago.� The install went without
> > hitch.
> >
> > > ls -l *.iso
> > -rw-r--r-- 1 tomdean tomdean 1212776448 Oct 28 19:44
> > linuxcnc-2.7.14-wheezy.iso
> > > sha256sum *.iso
> > 079ba1fae48861b0814187b8048d6f2f299f943427d8c4806b65519f3a560d48
> > linuxcnc-2.7.14-wheezy.iso
> >
> > Tom Dean
> >
> >
> > _______________________________________________
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users



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