Re: Re: Re: G92

>    From: "Les Watts" <leswatts@...>
> Subject: Re: Re: G92

<s>
Now when I run another part requiring

> re-zeroing I do that with a new G92 in MDI before running the
> gcode program again. The display then indicates the SUM
> of the latest offset and the previous one. I end up just closing
> EMC and restarting, including re-homing the axes, because
> i'm not sure what's going on.

That's what I was trying to say when I suggested a first time g92 offset.
If you issue a g92.1 it will erase all of the g92 offsets in memory and
you can then issue a new g92 and you should get a correct answer. Let me
know if that is the case. It seems to be with the little I do here.

> I am sure not going to claim expertise in this dialect of RS-274.
> I just read the documentation for the interpreter-but I think that
> is for the old original one. I think documentation for some of the
> changes is a little sparse. Reading the rems in the latest
> interpreter source code might be a good thing for me to do.
> G92.1, G92.2, and G92.3 are a mystery for me.

g92.2 cancels the current g92 offsets but does not remove them from
memory. To my way of thinking this is real dangerous. They are supposed
to come back with a g92.3, if they are still in there.

Stopping the emc and restarting does not always cancel them out. Most of
the time, they are written to the var file. You could check the var file
when you start up. It's under view offsets and variables and the
relevant variable names are 5211 to 5216 and you can set them to zero
using that screen and then reload parameters with the button if all else
fails.

HTH

Ray