The Tronxy XY2 pro has a bed level sensor that is subject to environmental instability. Probing the bed within a short space of time is not affected by environmental changes but homing is. This has caused Tronxy owners problems for years with constantly having to reset Z offsets before printing. A fixed Z stop solves the problem of inconsistent homing with minimal cost just by plugging a fixed stop into the unused Z stop socket on the main board. This fix means Marlin works as expected on any machine, not just Tronxy, fitted with both a fixed Z stop and a proximity probe.

I don't really get why you are trying to get rid of probe Z offset setting. It isn't offset from home position to probe/nozzle, but is distance between probe trigger point and nozzle tip.

Hi Nuck-TH. The simple answer is I'm not trying to get rid of the probe Z offset.please see bug report #27680 for more info.

Hi Scott. I have been looking at taking this to the next level. The Anycubic Kobra 3 user interface offers only one option to "Auto Level" and their advertising claims simplicity of operation as a major plus. I have started testing under bed strain gauges the idea is to use the nozzle to probe the bed in one location where a strain gauge can easily sense contact (30grams of pressure) to establish Z Home (Z zero). A sequence of preheat nozzle and bed, wipe nozzle, home and level. would be possible to set up with no user setting up required. This would match the Anycubic set up. It does require that a separate Z stop and probe work properly together. This is the direction I think consumer machines are going now with the Anycubic, Bamboo Labs and Creality machines leading the way. It would be great if Marlin can offer similar levels of user experience even on older machines with a cheap and easy to follow upgrade path.