[Solved] Z axis Calibration failes After 3.9.0 upgrade  

Z axis Calibration failes After 3.9.0 upgrade

After upgrading to 3.9.0 firmware, I am now having Z-axis issues.  I initially got "Bed leveling failed, Sensor didn't trigger. Debris on nozzle?"

Yes, the nozzle is clean, and the PINDA reads correctly, when I put a metal object near it, the light goes off and the state is read as 1. 

After attempting multiple times, to calibrate and clean and fix, I proceeded to wipe the nv settings and attempt again. Made no change.

When running the z axis leveling, do I see the light on the PINDA turn on and off, when hovering over the calibration point.  When doing a full calibration, it find the first point and when it moves to the second, I can see the PINDA light flicker as it find the calibration point, but then fails.

I did find the software proterface, and hooked up the usb cable and was watching the message log.  It looks like the firmware is not reading the one direction from the PINDA over the second point.

See below, from the first point, you can see the see the alignment marker clearly, but on the second point, it looks like every other scan didn't detect the alignment marker, but the does see it in one direction.

This only started happening once I installed the new firmware. So is this a firmware issue or am I having a hardware fault?

From the first point:

RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0400000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0400000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 00000000001e9e78260000000000000000000000000000000000000000000000
RECV: 00000000004e8276020000000000000000000000000000000000000000000000
RECV: 0000000000006424000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 00000000000000000000000024869c9a84821800000000000000000000000000
RECV: 00000000000000000000001090aeb4b4b2985e06000000000000000000000000
RECV: 000000000000000000000034a8c0c4b6aca2904a000000000000000000000000
RECV: 00000000000000000000005ed4baa89a9c9e9244000000000000000000000000
RECV: 000000000000000000001282b6b6aa9a9caca064000000000000000000000000
RECV: 00000000000000000000003ec6aeaca09e9c8426000000000000000000000000
RECV: 00000000000000000000004a72b6bcbeb4965a00000000000000000000000000
RECV: 0000000000000000000000003e989c9c8c5e0400000000000000000000000000
RECV: 0000000000000000000000000006466000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000001e6a520000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000

From the second point I see:

RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 00000000000000000000000000001090d8500000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000274e06c0636bc5e020000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 00000000000000000000000036bee4ce46aebe30000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 000000000000000000000000000c88ec70080000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000
RECV: 0000000000000000000000000000000000000000000000000000000000000000

Peter