PROBE Z‐OFFSET MENU - dennislia/Marlin-2-0-x-Anycubic-i3-MEGA-S-Fork GitHub Wiki

Probe Z-Offset Menu:

After selecting the Probe Z-Offset Menu the following LCD screen is presented. The top line on the LCD shows the current Probe Z-Offset in memory, that will be used by the Marlin Firmware to move the nozzle to programmed Z level. If this is a know good level the menu can be exited without recalibrating it.

To calibrate the Probe Z-Offset place a piece of paper on the bed and select Probe Down. The Probe Z-Offset will be set to 0. Then the Probe will be deployed and the Hot End will move down toward the piece of paper on the bed until it is triggered, at which point it will stop and move the X and Y probe offset in order to place the nozzle over the same location where the probe was triggered and stop waiting for Nozzle Down and Up to be selected. When the nozzle just brushes the paper the Probe Z-Offset is calibrated and the menu can be exited.

Note: Selecting Nozzle Down will move it -0.1mm, until the first time Nozzle Up is selected, then it will move in small increments of -0.02mm. The first Nozzle Up will move +0.1mm after which it will move up +0.02mm. This makes it quicker to get to an accurate Probe Z-Offset.

PROBE_0_RED

PROBE Z-OFFSET MENU GCODE

  1. Display of Probe Z-Offset

  2. M851 Z0\nG90\nG1 F4000 X125 Y159 Z15\nM401\nG38.2 F400 Z0\nG60 S0\nM402\nG91\nG1 F4000 X+10 Y-45\nG90\nG61 F400 S0 Z

  3. G91\nG1 F400 Z0.1\nG90 or G91\nG1 F400 Z0.02\nG90 // soft endstops are disabled

  4. G91\nG1 F400 Z-0.1\nG90 or G91\nG1 F400 Z-0.02\nG90 // soft endstops are disabled

PROBE_1

PROBE_2