I have just finishing up my plasma / router table it is a 48" x 96" table with steppers on each side for the y axes each side has a homing switch connected to a board with A home and Y home can I get mach 3 to controll each motor so I can bring the gantry back into alignment each time I send it home. Right now i have Y and A slaved.

Any help would be appreciated.

If they are slaved the Refrenceing routine should take care of this for you. Are you running the parrallel port or other hardware?

Brett

parallel port I think

Config menu then General Config page has an option to home slave with master, never had a slaved axis so not sure which way it should be set for squaring.
Hood

Soundman

If you have a separate home switch for each side of the slaved axis then uncheck "Home Salve with Master axis"

With the default homing macro, Y will home and A will travel along with it, and then A will home afterwards on its own, as Y stays still.  With only a very small amount of A movement.

I have seen it recommended to use Refcombination command in the macro with a slaved axis but I have never done so.

Greg

Thanks for the help I will try that tomorrow when I get back to the shop.

hi Soundman

Did you fix the problem? I'm having the same issue here.
I tryed to uncheck "Home Salve with Master axis" but then everything goes wrong here
Not sure what my next move will be

Borge

Yes I got it fixed and it self aligns, I was having a bad problem with it till I scraped the set I was working with and started fresh. I decided that I had set so many switches that I didn't know where the problem was.
When I started fresh and was making sure that every thing was working correctly as I progressed, I found that my homing switches for the gantry "Y" and "A" Were controlling the opposite axis so when "Y" axes stoped it it stopped the "A" axes instead and nothing was working right, It was overshooting the switches, not stopping were I wanted and creating all kinds of problems. I also figured out that once it was fixed that setting the home location from the stop position did not move the gantry it just moves the home position on the table. I was thinking that the gantry would move to the home position after hitting the stops. It doesn't. It does if you hit reference then hit home after it stops at the switches.

Still playing with it now I am down to getting the plasma to fire.

Hope this helps
P.S the slave with master in the general config page does need to be unmarked.

P.S the slave with master in the general config page does need to be unmarked.

That option is for using a single switch, When it's checked, I would think that it would ignore the second switch.