Re: G92-program zero

["Darrell" <dgehlsen-at-earthlink.net>]

It sounds like you would be better off dialing in your zero and then "Homing"
that position. The problem with the way you are now doing it is that you do not
have a known "Home" or zero point.
Darrell

----- Original Message -----
From: "Joel Jacobs" <jj-at-netexp.net>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Monday, June 04, 2001 9:25 AM
Subject: Re: G92-program zero


>
> Neither,  I am not doing any G92 commands in the program itself.  I am
> manually jogging the machine to my program zero position - the corner of the
> fixture or the vice or whatever - then I go to MDI mode and type G92X0Y0Z0
> and the coordinates displayed all change to zero.  Then I run the program.
> When the program finishes it destroys my carefully acquired zero point.
>
> Joel
>
> ----- Original Message -----
> From: "Darrell" <dgehlsen-at-earthlink.net>
> To: "Multiple recipients of list" <emc-at-nist.gov>
> Sent: Monday, June 04, 2001 11:59 AM
> Subject: Re: G92-program zero
>
>
> >
> > Dave,
> > Are you dialing in a start position and then in the program using a G92 to
> set
> > part zero with out any X/Y/Z moves? Or are you dialing in a known
> position,
> > setting that as "Machine Zero" then in the program moving to X/Y/Z
> position and
> > then doing G92?
> > If you are doing it the first way, you have no reference to a known zero
> so when
> > you end the program you loose your zero because the machine goes to your
> unknown
> > zero point.
> > Use known points such as a home position and a corner of the fixture or
> vise and
> > you will not loose your zero.
> > Darrell
> >
> > Subject: Re: G92-program zero
> >
> >
> > >
> > > Hi Dave,
> > > I may have to try xemc, I've been using Tkemc.  It never occurred to me
> to
> > > try a different GUI.  What I've found though is that if I set G92 in MDI
> > > mode and stay in MDI mode I can abort any commanded move without
> affecting
> > > the G92 setting.  If I abort a running program the coordinate displays
> are
> > > still correct but zero isn't zero any more - I can go to MDI and enter
> G1X0
> > > and it will move and it will stop but not at zero - the x coordinate
> display
> > > will be non zero.
> > >    If I let the program end, as soon as it hits the M30 it looses the
> G92
> > > setting and the coordinate displays shift - I can go to MDI and type
> G1X0
> > > and it will go to zero and display zero but it's not the zero I set with
> > > G92.
> > >   Sometimes I want to run two different programs on the same part
> without
> > > disturbing the setup or program zero and I can't do it.
> > >   I didn't think anything should change a G92 setting except another
> G92 -
> > > G92.1 - G92.2.
> > >
> > > Joel
> > >
> > > ----- Original Message -----
> > > From: "dave engvall" <dengvall-at-elltel.net>
> > > To: "Multiple recipients of list" <emc-at-nist.gov>
> > > Sent: Monday, June 04, 2001 1:08 AM
> > > Subject: Re: G92-program zero
> > >
> > >
> > > >
> > > > Hi Joel,
> > > > I've  done all sorts of things to shut down a program under xemc.
> Switch
> > > modes
> > > > i.e. F3 or F5 will halt the program.  Abort. etc. I use M2 to end and
> > > being a
> > > > non-expert it never occured to me to use M30.
> > > > In fact, I'm not aware of ever doing anything that shifts what is set
> by
> > > G92.
> > > > Maybe I just don't do anything fancy.
> > > > Hope this works for you.
> > > >
> > > > Dave
> > > >
> > > > Joel Jacobs wrote:
> > > >
> > > > > Could someone please explain to me how to stop a running program or
> even
> > > > > re-run a program without trashing program zero?  I set program zero
> with
> > > g92
> > > > > before running the program.  If I abort the program or if the
> program
> > > > > exicutes M30 (program end and rewind) my program zero gets trashed.
> > > This is
> > > > > really frustrating as I have to tear everything down and start over
> with
> > > the
> > > > > test indicator etc to find zero again.  Please help...
> > > > >
> > > > > Thanks
> > > > > Joel
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>