Negative Z Values needed for Milling using Repetier Firmware.

CharlesMakeAll

Trying to use Repetier Firmware for Milling a PCB board. All currently discovered programs require setting the zero at the top of the board and milling down into the board (-Z values).

How I do to enable Repetier-Firmware to move the bed in -Z values?

RAyWB

so you should have endstop at z-max.

set #define min_software_endstop_z false

CharlesMakeAll

Wow, that makes sense and is easy to do!

I'll give that a try, thanks!!!

Repetier

Firmware accepts negative z values. Homing to max is also nice. Go to reference level then and do G92 Z0 to set it zero.

In Repetier-Host select cnc mode to allow negative values and show transformed positions, otherwise it shows global positions including all offsets.