@gloomyandy said in SZP for bed level in 3.6-RC1:
You are not setting the probe threshold/trigger value in config.g (the P parameter to G31), so it will be using whatever the default is (which is almost certainly not correct) until you have performed a M558.1.
Correct. You can't guess this value so it would just be a random number. Before any use of the SZP I run a M558.1, such as in bed.g and mesh.g.
As to the mesh not reading zero at the centre of the bed. I would expect the scan to return 0 for wherever you have homed/set Z=0, ideally you will be homing and calibrating the probe at the same location
correct. I answered myself above when I remembered I am setting Z=0 with a separate probe at the back of the bed. So the bed scan does not necessarily cross zero, especially if the G31 offset for that probe isn't close enough.
Everything seems to be running well. I don't know why I had so much trouble setting it up. I understood the documentation but thought that I didn't because the results were so flaky. Knock on wood but it is stable right now. It is a very slick setup and much better than what I had before. Thanks for the help.
