Greetings!

I have an AvidCNC with auto tool changer. My tool rack is attached to the very front of the machine. To make room for the tool rack I moved the spoilboard forward to Y=434. I wanted the machine coordinates for the X and Y axis to be 0,0 at the spoilboard instead of at the front of the machine frame where the rack is attached so I offset Y-axis homing value to -434 such that when I home the machine Y=-434 instead of zero.

After doing so, when a tool change starts the Y-axis moves to +108.00 instead of moving to the assigned negative Y value to the rack that I assigned. No matter what negative Y value I assign to the tool it still goes to Y: +108.00 every time but the X and Z axis move to their intended positions.

I'd appreciate any assistance to make this work. Thanks!

Have you got soft limits turned on?

Yes, but the spindle does travel to all areas and works normally unless it is instructed to change tools. The problem exists only during an automatic tool change operation.

Could it be a case of "work coordinates" vs. "machine coordinates"?