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Hello,

I have upgraded a Max V2 to the H280 with accelerometer probe. I have made sure that my firmware is adjusted for smaller pulleys (16 teeth) and measured z movement to make 1mm of commanded movement= 1mm measured. The calibration goes as planned for the tower measurements but when it goes to measure the z height the probe does not stop the movement and continues to push for 1/2 second and then homes and will continue to do this until you stop the machine. So the probe works on the outer measurements but not center of build plate. Any help would be greatly appreciated.

Update: It does probe once in the middle correctly, but when it probes only in the center it fails.

I found something similar. I debugged the code and added messages to figure out what what going on. On my machine the first probe of the center under circumstances I don't understand will trigger early.

I fixed the issue by Changing configure.h. Around line 743 I Chaged #define Z_PROBE_REPETITIONS 0 to #define Z_PROBE_REPETITIONS 3.
I have since change it to #define Z_PROBE_REPETITIONS 10 so that it gets a better average.


Dale Eason

My solution is for probes that trigger a little early sometime. Yous might be a different Problem if it is trigging too late and banging into the bed too much.

Dale Eason

Thanks for the input, it lead me to check some things. I found that the Max V3 firmware is set up for 375mm max on the Z axis. I had set z zero manually and that was 347mm, so the first probes used this number. Then when it probed for Z height it used the max z in firmware the establish the height where it started the probe which was 15mm below the surface of the print bed. I changed the z max to 350 in firmware.