5 - Hit the 'Zero Z' button just in the same way that you would normally set the z offset. 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. 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. Does not lower. 6 - Put the tool height setting probe (THSP) on the bed of the machine (NOT on the top of the job), it could be fixed to the bed in a specific position if required. is you z-height correct? 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. It stays at the same height, which is 0.5mm above the bed. I think now I’m 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 “-10”, which still leaves the nozzle somewhere (no calipers yet) around a half-centimetre or so above the bed. 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. I do the homing with G1 and S1 parameter. if its to high it would crash into the bed. So Z offset doesn't work trough the Marlin code. Forgot to add: Endstop for Z axis is connected to the Z endstop connector near the stepper connector. 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 Z-axis offset, or Z-offset for short, is the distance from the top of the heated bed washers (defined as “zero”) to the tip of the hot end nozzle. G30 in the homez.g is commented out, since it does not respond to switch trigger. I went into the offset tab in Mach3, I changed the tool from 0 to 99 which is my probe, and I am using the following macro for Z: I am not very familiar at all with writing probe macros, I simply use the setup templates in the HAAS controller. In general, only probes that use the actual nozzle (like piezo sensors) will need a positive Z_PROBE_OFFSET_FROM_EXTRUDER. and then try to probe it (dont know if its a typing fault but the command is G32 S2). the G32 S2 will take care of z-height and will correct it to the right one. Can somebody guide me on this issue please ? or the G29 value replaces the M851?. even if its correct try to lower it by lets say 20 to 30 mm. How does Z offset (M851) work with an auto leveling sensor?Does it add the Z offset to the offset of the G29 mesh? 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.. 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 … Then I tried Z offset in Repetier and the same happens. I have the M558 and M31 commented out, since I am not using any z probe. This number will always be a negative value—the closer your Z-offset is to zero, the further away from the print surface the hot end nozzle will be moved. 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. 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