Re: G53-57 was Re: Need Zero Help!!

Thanks Ray,

I'd like to understand the use of G53-57 (fixture offsets) a little
better. The handbook has a little data. I got that G53 is machine
coordinates, and G54-57 are work coordinates (and that they alias to
T0-4?).

so are they just saving AXYZ offsets (and tool comps?), which are then
added to the machine coordinates? Or is there more to it then that?

If I do G92 in "G53", this sets the machine coordinates; then if I
reposition to a new fixture, do I issue G54 and then G92 again?

After that, I should be able to switch "fixtures" by a G54-57 ?


Alan KM6VV
(I know, read the handbook) ;>)


Ray Henry wrote:

>
> Ed, Alan
>
> If you do not have home switches and are running with those pins closed
> in your ini file, you can just hit home for each axis when you get where
> you want 0.00 to be.
>
> I'd use the script named Set_Coordinates that is under the scripts menu
> in themc. It has teach for all axes that you have defined. If you leave
> g54 alone and use g55 for your first coordinate system you can switch
> between by just placing a g54 or g55 in the starting block where you want
> the change to be active.
>
> If you are going to use g92, don't forget g92.1, g92.2 and g92.3. I
> described the effects of each of these on my grizz in a paper that is
> available in the dropbox at www.linuxcnc.org. It's available in three
> formats
>
> g92test1.lyx
> g92test1.pdf
> g92test1.ps
>
> Using this code can be a bit tricky.
>
> Hope this helps (not zero help)
>
> Ray