I know that I can get Simplify 3D to print up to a certain layer, and then change the filament and print again using the "start printing at" control. The problem is that the design of my printer makes homing while something is on the buildplate problematic. I have an Airwolf HD2X. The XY nozzle is on rods that get in the way when the machine homes Z.
I know that I can prevent homing by getting rid of the G28 Z0 command in the starting script. Then it will home X and Y, but not Z. This is acceptable since the Z axis is unlikely to move while I change filament.
If I do this, where will the printer start printing? Will Marlin assume that it has homed, and then move up to the "start printing at" from the level it is already at giving me a mess?
Is there a way to tell it where it is so that that doesn't happen?