I’m implementing auto bed level function to my old printer.
But I’m stuck in setting z probe offset.
I’ve done every procedure of the @Thomas_Sanladerer 's video, but I got more than 1mm gap from the bed after I finished setting. That gap is not proper value, I think, can be adjusted by slicer’s z-offset option.
@Peter_Hertel I don’t think that issue relevant with mine.
The problem I have is that I can adjust z-offset no matter how I change Z_PROBE_OFFSET_FROM_EXTRUDER value in firmware(at least, it seems like that). It has always about 1mm gap between nozzle and bed.
I had a similar issue but the Z offset wasn’t going through, no matter what value I put into it. I tried using Slic3r’s z offset feature but that didn’t work either. The only solution that I could find that works is by defining the Z offset by writing it in the START GCODE. Set your Z offset to 0 and use the following gcode commands:
G29 (auto calibrate head)
G1 Z-0.25 (move Z down, your offset value)
G92 Z0 (define as new Z home)
@Camerin_hahn No, just G28. It has worked just some hours ago. (Hotend moves to center) I have no idea what caused change. One thing I found is MAX Z endstop is somehow triggered always after some point. Which was not like that. I confirmed configuration again but status would not change. I think it might be the reason coz I saw mis-configured endstops cause unexpected movement of G28 before.
@DongWon_Han_DWONH Unfortunately, I am using a servo, so it is a bit different. But for the Z offset, mark a spot on your bed. Bring the nozzle down to that spot to the correct printing height. Zero out your Z axis. I usually just disconnect/reconnect Repetier. That zeros out everything. I raise my probe 20mm (you can probably get away with 10mm). Center the probe over the marked spot and start lowering the probe till it triggers. The number it triggers at is the Z offset.
I usually do it in about 3 spots to double check myself.
I hope that helps. Tom’s video is pretty thorough. I used ZennmasterM’s videos for mine. You can find those here: