What sort of sensor are you using? If it's an inductive or capacitive sensor you want to keep away frrom probing the very edges of the bed - these probes tend to have trouble at those locations. Marlin 1.1.9 includes a MIN_PROBE_EDGE setting that ensures that only points a certain distance away from the bed edges are probed. If MESH_INSET is less than MIN_PROBE_EDGE, this means that some of the points of your mesh will not be probed and will need to be initialized using G29 P2, but this allows you to have a mesh that covers the whole bed while still only probing points that are safe.
↧