My printer is an Anet A8 with Marlin firmware, I was having issues with the autoleveling sensor and reset the Z offset to 0 and let G29 get the mesh offsets and its working good now.. I need to make a macro to take several readings on a Z surface (maybe 5-6), then average them out and input the result to work offset. or the G29 value replaces the M851?. If the nozzle is at .35mm above the bed when the probe triggers, that means that Z_PROBE_OFFSET_FROM_EXTRUDER needs to be -0.35. I think now Iâm supposed to babystep Z down to the usual sheet-of-paper height off the bed by doing Configuration -> Probe Z Offset, but the most I can lower the nozzle is a value of â-10â, which still leaves the nozzle somewhere (no calipers yet) around a half-centimetre or so above the bed. This number will always be a negative valueâthe closer your Z-offset is to zero, the further away from the print surface the hot end nozzle will be moved. How does Z offset (M851) work with an auto leveling sensor?Does it add the Z offset to the offset of the G29 mesh? Also, it's good to enable Z safe homing, so it homes at the center of the bed (Marlin is clever enough to know that means the probe is at the center, not the actual nozzle) First, start with -2.0mm offset, then you'll be able to edit the offset right in the printer's menus, mine's currently at ⦠Hi, I have spent time levelling the bed on my 2+ with PLA and now want to print with PETG, but PETG requires a greater Z offset (an extra 0.2mm), I don't want to re-level the bed and would rather add 0.2 to the z height in Cura, is there a way to do this ?, there used to be a setting which indicated it could do this but it is not any longer present in Cura 3. That would seem to not be sufficient. Hi all, I have recently setup my Z probe and got G29 working correctly, It compensates for an unlevel bed (I can see Z changing) however, I cannot seem to get the Z probe offset set correctly. In general, only probes that use the actual nozzle (like piezo sensors) will need a positive Z_PROBE_OFFSET_FROM_EXTRUDER. For example, if the switch trips when the platform is 3 mm below the nozzle, you set the Z offset to +3.0 (or maybe -3.0, your mileage may vary), so that the Z=0 position corresponds to the nozzle tip. I have the M558 and M31 commented out, since I am not using any z probe. 5 - Hit the 'Zero Z' button just in the same way that you would normally set the z offset. I measured the offset to .5mm by placing the nozzle on the bed and going up ⦠if its to high it would crash into the bed. The Z-axis offset, or Z-offset for short, is the distance from the top of the heated bed washers (defined as âzeroâ) to the tip of the hot end nozzle. Does not lower. Then I tried Z offset in Repetier and the same happens. I am trying to get my Probe working in Mach3, so I entered 2 tools into my tool table, tool 99 (my probe) at 6.5 height, and tool 30 at 4 height. the G32 S2 will take care of z-height and will correct it to the right one. I am not very familiar at all with writing probe macros, I simply use the setup templates in the HAAS controller. even if its correct try to lower it by lets say 20 to 30 mm. Changing the Z offset allows you to fine-tune the Z=0 position by exact values, not putzing with a mechanical setting that can make things worse. and then try to probe it (dont know if its a typing fault but the command is G32 S2). When setting Z offset to 0 in Marlin, and then adding G92 Z0.5 in the GCODE, it lowers the model in the slicer, so 0.5mm of the part goes into the ground. Can somebody guide me on this issue please ? G30 in the homez.g is commented out, since it does not respond to switch trigger. 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