Auto_Bed_Leveling: Enhanced G29 command

[brainscan]

You're an absolute genius!!!!!!!!!!!!!!!
>>>G28
SENDING:G28
??? Going to zero Z-Axis with offset of: -7.400000
Debug-1: Z-Axis current location: 20.000000
Debug-2: Z-Axis current location: 0.000000
Debug-3: Z-Axis current location: 0.000000
Debug-4: Z-Axis current location: 0.000000
Debug-5: checking if we can delete Z specific homing code.
Debug-8: Z-Axis current location: 0.000000
Debug-9: Z-Axis current location: 7.400000
Debug-10: Z-Axis current location: 7.400000
>>>M114
SENDING:M114
X:84.00 Y:97.00 Z:7.40 E:0.00 Count X: 84.00 Y:97.00 Z:7.40

In my excitement though I forgot to raise the head again before G29 and had to quickly hit the reset button. I think i'll add the z raise before back in and try again. I'll post the results but I think you've cracked it. Not sure when I last reset the EEPROM so I would never have thought to try that. Thank you thank you thank you, you're honestly a legend!!!

***Thank you so much, everything seems to be working. I just sent a G1 Z0.2 and it went down to what looks like 0.2, yes!!!! Gave it a few x and y moves and it tracks the bed exactly as it should.

>>>G28
SENDING:G28
??? Going to zero Z-Axis with offset of: -7.400000
Debug-1: Z-Axis current location: 0.000000
Debug-2: Z-Axis current location: 0.000000
Debug-3: Z-Axis current location: 0.000000
Debug-4: Z-Axis current location: 0.000000
Debug-5: checking if we can delete Z specific homing code.
Debug-8: Z-Axis current location: 0.000000
Debug-9: Z-Axis current location: 7.400000
Debug-10: Z-Axis current location: 7.400000
>>>G29 n5 T V4
SENDING:G29 n5 T V4
Roxy's Enhanced G29 Auto_Bed_Leveling Code V1.01:
Bed x: 15.00 y: 10.00 z: 7.48
Bed x: 56.00 y: 10.00 z: 7.51
Bed x: 97.00 y: 10.00 z: 7.51
Bed x: 138.00 y: 10.00 z: 7.49
Bed x: 179.00 y: 10.00 z: 7.45
Bed x: 15.00 y: 55.00 z: 7.38
Bed x: 56.00 y: 55.00 z: 7.42
Bed x: 97.00 y: 55.00 z: 7.44
Bed x: 138.00 y: 55.00 z: 7.46
Bed x: 179.00 y: 55.00 z: 7.45
Bed x: 15.00 y: 100.00 z: 7.35
Bed x: 56.00 y: 100.00 z: 7.39
Bed x: 97.00 y: 100.00 z: 7.42
Bed x: 138.00 y: 100.00 z: 7.44
Bed x: 179.00 y: 100.00 z: 7.44
Bed x: 15.00 y: 145.00 z: 7.35
Bed x: 56.00 y: 145.00 z: 7.38
Bed x: 97.00 y: 145.00 z: 7.40
Bed x: 138.00 y: 145.00 z: 7.42
Bed x: 179.00 y: 145.00 z: 7.40
Bed x: 15.00 y: 190.00 z: 7.43
Bed x: 56.00 y: 190.00 z: 7.45
Bed x: 97.00 y: 190.00 z: 7.44
Bed x: 138.00 y: 190.00 z: 7.40
Bed x: 179.00 y: 190.00 z: 7.30
Eqn coefficients: a: 0.00 b: -0.00 d: 7.46
Mean of sampled points: 7.423578


Bed Height Topography:
+0.00884 +0.02212 +0.01627 --0.02280 --0.11889
--0.07163 --0.04233 --0.02084 --0.00444 --0.02553
--0.07670 --0.03139 --0.00405 +0.01744 +0.01900
--0.04506 --0.00834 +0.01431 +0.03228 +0.02447
+0.05455 +0.08853 +0.08345 +0.06275 +0.02798


planeNormal x: -0.00 y: 0.00 z: 1.00


Bed Level Correction Matrix:
1.000000 0.000000 0.000083
0.000000 1.000000 -0.000447
-0.000083 0.000447 1.000000
echo:endstops hit: Z:7.31

[Roxy]

Good news! I think you are ready to go back to the saved version of Marlin_Main.cpp but you still have a couple lines of debug code at the start of the G28 command that need to be pulled. My guess is your Z_OFFSET of -7.4 is going to have to be tweaked one direction or the other. I usually take a look at how the first layer of a print is going down to decide which way to adjust it.

[brainscan]

Thank you so much, its 1:00am so its a bit late to start a print but I have the day off college tomorrow so I can test it and tweak it. I just made a small adjustment to reduce the travel of the probe so the offset is -7.6 now and at Z0 gives me just enough room to squeeze a sheet of paper through the gap. Hopefully it should be pretty close from the start (probably much more so than manual levelling). Next thing is to improve my probe, way too much play in it. I was pretty happy with the 0.000700 standard deviation I got earlier but think it can still be better with ball/lead screws and proper probe mount. I'll try not to ask you for anything for a while, I really need to learn how to help myself when it comes to code but I just don't know where to start really.

[Roxy]

Your probe accuracy looks pretty good... I would wait to mess with that. Just get it printing right first. Other things will have a bigger impact. Like spreading the sample points across the bed as far as possible.

[old man emu]

OK. I'll get back to you with this after my house move when I will have my printer set up to go again.

OME