After homing X and Y, can I auto move to a non 0,0 location?

pgf wrote:

Okay, I think a picture will help.

That's because since homing (and even rapids, on my mill) are very slow, I'd really rather skip the extra bed travel, and have it home directly to 12, and stayed there.
 

Homing does not have to be slow but there is a tradeoff between overtravel and velocity. Now you have it working, try playing with the HOME_VELOCITY and LATCH_VELOCITY. ON my plasma table, I settled on 12 metres/minute

Ha!!! My motors stall if I go much over 40 inches / minute!

pgf wrote:

Ha!!! My motors stall if I go much over 40 inches / minute!
 

That seems exceptionally slow.

Is there a problem with your machine - perhaps axis binding - or do you have really undersized motors?

Heh. I would have to say probably "yes", to both. LOL.

It's a DIY mill. In 1993, II got it as a kit, which included the stepper, a driver board (which did just raw coil driving -- not even step/dir!) along with plans for a chassis made of particle board, rails from high quality drawer slides, and all-thread rod as the transport. The s/w that came with it was written for DOS, polling loops and all.

There have obviously been a lot of upgrades over the years: EMC/LinuxCNC in 2004, acme rod for X and Y (Z still uses the all-thread) a lot of chassis strengthening, a real step/dir driver board maybe 10 years ago, and a Mesa card and Raspberry Pi this year. But it still has the same steppers, and the linkages and threaded shafts aren't all that well aligned. Frankly, I'm amazed it all kind of still works. But I have fun with it... when it's not driving me nuts!

Pictures here: projects.foxharp.net/cnc/