Re: Re: Need Zero Help!!

Alan +

Your description is exactly the way that the authors indended the use of
g54 to g59.3.

I'm not certain that there is only one right way to use the g92 offsets
but Tim pointed out that differences in the way that this command
operates now and three years ago is the reason he won't run the BDI. The
biggest problem is the persistence of the offsets and their being
displayed correctly so that you don't press cycle start and have it begin
milling it's way into the knee drive gears.

If your g92 offsets are in the var file that is being watched by the EMC,
there should be little problem with persistence -- even after an abort or
estop. Just put a g92.1 at the end of the program to save in ram, but
turn off the offsets and a g92.3 at the start of your program and they
will be recalled.

BTW right clicking on the position display or name uses g92 so they will
behave the same if they are entered there or in a program block.

HTH

Ray

>    From: Alan Marconett KM6VV <KM6VV@...>
> Subject: Re: Need Zero Help!!
>
> Hi Jon,
>
> Well, looks like I'm using it wrong too.  I really only use it this
> way!
>
> After reading the "handbook" some more today, I figure G54 etc. ought
> to be useful for fixtures.  I just realized (finally understood) that
> G53 is for physical coordinates and G54, G55 etc. are for different
> fixtures.  So, if I figure out where to put home switches on the
> Sherline mill, I can then note the fixture offsets (or where ever the
> part is secured), and then always get back to it.  At least I *think*
> that's what somebody had in mind.  I currently secure the part, set the
> edges or reference point with an edge finder, and use "G92 X-.1" (as
> you're describing) to set my zero reference (and similar for Y).  Works
> fine if the machine doesn't loose it, and I don't machine away the
> reference edges!  I'm still open to ideas!
>
> G92 is for temporary adjustments??
>
> Alan  KM6VV