Re: [CAD_CAM_EDM_DRO] Re: G92

----- Original Message -----
From: "Matt Shaver" <mshaver@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, July 16, 2002 11:45 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: G92

Hi Matt,

> Here's my take on this:
>
> I. G92 has changed from being completely "sticky" to being reset by M2 and
> M30. (This is essentially the core of Tim & Jon's posts.)

Abort also resets it. If M2 and M30 behavior gets changed to sticky then
don't forget abort too. Reason - you might set x and y to part zero and z
above the part to do a dry run. Once you see everythings ok you might abort
the dry run - you wouldn't want to loose x and y at this point right?

> Some questions are:
>
> 1. When you use G92, do you:

I use MDI - if I want to set the Y axis to zero at the edge of a piece I
might use a wiggler with a .1 tip and find the edge - then type g92y-.05

> 2. Other than the G92 problem, are there any other problems with the new
> interpreter?

It's been a while but I remember the software limits seemed to move at
times. I only have home switches at one end and it would be nice to be able
to rely on the software limits to keep from hitting the stops on the other
end. I forget exactly what they were doing - I think they were following
the g92 offsets around instead of staying relative to machine home. I ended
up putting huge working lengths in the ini to disable them.

> Some possible solutions are:
>
> 2. If the problem is with situation "1B", we could add an ini file
> parameter like G92_BEHAVIOR = TRADITIONAL or CONTEMPORARY so the user can
> have it the way they want.

Yes, we seem quite divided and this would make everyone happy. Wonderful
Idea.

> III. Joel agreed with Tim & Jon, plus, I think his "backlash value is
added
> to the home position every time you rehome an axis" bug is still in there
as
> well, which must add to his frustration (although I think he told me he
> changed to ballscrews to get past this problem). Needless to say, this
needs
> to be fixed as well...

Hey good memory Matt. I changed to zero backlash ball screws and never
looked back...

Joel