Z wont go to the corect dept when printing.

Snippy

When printing i need to manualy babystep ~-1mm for print to stick

Z0 has been tweaked at 0,2mm with a gauge on all 4 corners.
BLtouch Z offset from nozzle is measured at ~2mm, with a gauge block.

M558 K0 P9 C"io7.in" H5 F120 T6000 ; configure BLTouch probe via slot #0
G31 P500 X45 Y0 Z2 ; set Z probe trigger value, offset and trigger height
M950 S0 C"io7.out" ; create servo #0 for BLtouch
M557 X0:400 Y0:400 S20

G30 at midle bed results in nothing or a Error: G30: Insufficient axes homed for bed probing and a Flashing BLtouch that is stuck and needs a printer re boot
M280 P9 S160 Does nothing.
Impossible to establish Z=0 G

When homed
G30 s-1
Stopped at height -1.080 mm

G29
Results in
Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 G, then re-probe the mesh.
378 points probed, min error 0.690, max error 2.499, mean 1.110, deviation 0.357
Height map saved to file 0:/sys/heightmap.csv

RepRapFirmware height map file v2 generated at 2025-02-20 23:03, min error 0.690, max error 2.499, mean 1.110, deviation 0.357
axis0,axis1,min0,max0,min1,max1,radius,spacing0,spacing1,num0,num1
X,Y,0.00,400.00,0.00,400.00,-1.00,20.00,20.00,21,21
0, 0, 0, 1.425, 1.253, 1.111, 0.994, 0.910, 0.879, 0.875, 0.870, 0.848, 0.896, 1.010, 1.140, 1.245, 1.410, 1.615, 1.744, 2.066, 2.222
0, 0, 0, 1.378, 1.270, 1.128, 0.983, 0.875, 0.881, 0.840, 0.839, 0.888, 0.899, 0.966, 1.078, 1.219, 1.375, 1.537, 1.766, 1.949, 2.148
0, 0, 0, 1.352, 1.204, 1.037, 0.979, 0.846, 0.860, 0.796, 0.840, 0.850, 0.916, 0.928, 1.049, 1.230, 1.356, 1.517, 1.716, 1.922, 2.119
0, 0, 0, 1.257, 1.161, 1.010, 0.967, 0.872, 0.822, 0.801, 0.834, 0.830, 0.870, 0.955, 1.046, 1.178, 1.311, 1.459, 1.686, 1.859, 2.028
0, 0, 0, 1.237, 1.125, 1.006, 0.910, 0.832, 0.804, 0.763, 0.756, 0.820, 0.884, 0.936, 1.062, 1.165, 1.280, 1.429, 1.608, 1.786, 1.970
0, 0, 0, 1.139, 1.053, 0.960, 0.851, 0.770, 0.746, 0.750, 0.731, 0.784, 0.835, 0.890, 0.975, 1.080, 1.195, 1.350, 1.479, 1.679, 1.816
0, 0, 0, 1.166, 1.026, 0.925, 0.855, 0.759, 0.767, 0.730, 0.701, 0.734, 0.773, 0.838, 0.944, 1.047, 1.136, 1.283, 1.445, 1.609, 1.780
0, 0, 0, 1.089, 1.007, 0.932, 0.822, 0.759, 0.759, 0.700, 0.721, 0.707, 0.770, 0.816, 0.870, 0.999, 1.178, 1.277, 1.378, 1.535, 1.703
0, 0, 0, 1.060, 0.971, 0.908, 0.840, 0.767, 0.734, 0.690, 0.696, 0.720, 0.770, 0.849, 0.911, 0.996, 1.108, 1.251, 1.374, 1.491, 1.671
0, 0, 0, 1.074, 0.985, 0.889, 0.845, 0.789, 0.770, 0.720, 0.729, 0.740, 0.769, 0.818, 0.892, 0.974, 1.090, 1.206, 1.384, 1.467, 1.656
0, 0, 0, 1.091, 0.977, 0.900, 0.868, 0.769, 0.770, 0.749, 0.749, 0.745, 0.760, 0.814, 0.898, 1.010, 1.086, 1.219, 1.336, 1.475, 1.620
0, 0, 0, 1.114, 1.013, 0.921, 0.858, 0.777, 0.785, 0.815, 0.756, 0.734, 0.759, 0.816, 0.894, 0.970, 1.090, 1.206, 1.334, 1.466, 1.624
0, 0, 0, 1.136, 1.062, 0.936, 0.871, 0.796, 0.850, 0.784, 0.727, 0.757, 0.769, 0.831, 0.891, 0.996, 1.076, 1.255, 1.370, 1.516, 1.634
0, 0, 0, 1.197, 1.101, 0.977, 0.932, 0.825, 0.820, 0.785, 0.754, 0.780, 0.793, 0.851, 0.925, 0.985, 1.114, 1.289, 1.414, 1.536, 1.700
0, 0, 0, 1.247, 1.078, 1.001, 0.934, 0.864, 0.810, 0.810, 0.765, 0.799, 0.819, 0.881, 0.970, 1.092, 1.130, 1.275, 1.444, 1.571, 1.760
0, 0, 0, 1.265, 1.146, 1.000, 0.967, 0.841, 0.820, 0.818, 0.781, 0.791, 0.820, 0.889, 0.954, 1.090, 1.161, 1.300, 1.475, 1.626, 1.836
0, 0, 0, 1.352, 1.158, 1.020, 0.956, 0.860, 0.812, 0.793, 0.766, 0.825, 0.868, 0.928, 0.984, 1.104, 1.274, 1.364, 1.555, 1.736, 2.017
0, 0, 0, 1.379, 1.219, 1.059, 0.953, 0.862, 0.829, 0.795, 0.797, 0.812, 0.892, 0.940, 1.039, 1.160, 1.290, 1.463, 1.600, 1.828, 1.999
0, 0, 0, 1.453, 1.267, 1.075, 0.994, 0.879, 0.831, 0.781, 0.769, 0.810, 0.944, 0.944, 1.092, 1.171, 1.406, 1.539, 1.715, 1.953, 2.189
0, 0, 0, 1.516, 1.324, 1.186, 1.054, 0.876, 0.854, 0.793, 0.786, 0.829, 0.880, 0.991, 1.080, 1.211, 1.386, 1.588, 1.838, 2.021, 2.358
0, 0, 0, 1.591, 1.381, 1.190, 1.084, 0.894, 0.841, 0.824, 0.856, 0.880, 0.922, 1.006, 1.100, 1.311, 1.506, 1.715, 1.979, 2.251, 2.499

Snippy

@Snippy

Got The bed leveling to ''work''

RepRapFirmware height map file v2 generated at 2025-02-21 00:50, min error 0.084, max error 1.674, mean 0.474, deviation 0.320
axis0,axis1,min0,max0,min1,max1,radius,spacing0,spacing1,num0,num1
X,Y,0.00,400.00,0.00,400.00,-1.00,20.00,20.00,21,21
0, 0, 0, 0.939, 0.751, 0.632, 0.496, 0.392, 0.341, 0.330, 0.310, 0.311, 0.359, 0.450, 0.506, 0.630, 0.771, 0.932, 1.148, 1.306, 1.523
0, 0, 0, 0.878, 0.761, 0.611, 0.484, 0.372, 0.344, 0.294, 0.293, 0.299, 0.314, 0.365, 0.449, 0.601, 0.747, 0.886, 1.049, 1.210, 1.438
0, 0, 0, 0.804, 0.679, 0.546, 0.477, 0.349, 0.322, 0.253, 0.267, 0.287, 0.326, 0.366, 0.428, 0.561, 0.704, 0.860, 1.036, 1.200, 1.410
0, 0, 0, 0.744, 0.635, 0.487, 0.444, 0.342, 0.283, 0.251, 0.267, 0.269, 0.286, 0.356, 0.429, 0.560, 0.652, 0.785, 0.987, 1.142, 1.340
0, 0, 0, 0.693, 0.604, 0.485, 0.384, 0.281, 0.254, 0.214, 0.210, 0.235, 0.257, 0.315, 0.443, 0.545, 0.631, 0.735, 0.904, 1.088, 1.214
0, 0, 0, 0.625, 0.503, 0.435, 0.322, 0.231, 0.194, 0.190, 0.142, 0.184, 0.221, 0.275, 0.336, 0.434, 0.526, 0.662, 0.799, 0.971, 1.102
0, 0, 0, 0.632, 0.477, 0.366, 0.306, 0.188, 0.184, 0.129, 0.112, 0.146, 0.170, 0.223, 0.300, 0.390, 0.485, 0.580, 0.735, 0.886, 1.040
0, 0, 0, 0.553, 0.460, 0.386, 0.263, 0.182, 0.185, 0.105, 0.130, 0.101, 0.151, 0.189, 0.226, 0.346, 0.490, 0.566, 0.678, 0.821, 0.970
0, 0, 0, 0.526, 0.416, 0.342, 0.264, 0.206, 0.161, 0.100, 0.096, 0.115, 0.144, 0.209, 0.264, 0.340, 0.424, 0.537, 0.666, 0.794, 0.925
0, 0, 0, 0.529, 0.431, 0.329, 0.283, 0.194, 0.170, 0.121, 0.112, 0.120, 0.135, 0.165, 0.233, 0.295, 0.402, 0.490, 0.675, 0.747, 0.920
0, 0, 0, 0.543, 0.432, 0.330, 0.287, 0.169, 0.166, 0.126, 0.109, 0.091, 0.112, 0.151, 0.233, 0.344, 0.392, 0.511, 0.612, 0.766, 0.889
0, 0, 0, 0.578, 0.453, 0.365, 0.286, 0.196, 0.168, 0.184, 0.112, 0.084, 0.105, 0.158, 0.234, 0.289, 0.399, 0.495, 0.622, 0.755, 0.909
0, 0, 0, 0.596, 0.517, 0.371, 0.276, 0.194, 0.245, 0.149, 0.088, 0.109, 0.111, 0.161, 0.216, 0.318, 0.400, 0.550, 0.662, 0.791, 0.882
0, 0, 0, 0.661, 0.553, 0.422, 0.352, 0.246, 0.205, 0.141, 0.124, 0.125, 0.131, 0.185, 0.261, 0.306, 0.429, 0.570, 0.684, 0.805, 0.957
0, 0, 0, 0.696, 0.526, 0.418, 0.334, 0.246, 0.165, 0.180, 0.116, 0.140, 0.160, 0.229, 0.299, 0.400, 0.412, 0.557, 0.727, 0.834, 1.015
0, 0, 0, 0.716, 0.568, 0.431, 0.388, 0.261, 0.194, 0.185, 0.145, 0.144, 0.160, 0.221, 0.283, 0.396, 0.470, 0.589, 0.740, 0.870, 1.059
0, 0, 0, 0.789, 0.608, 0.438, 0.364, 0.249, 0.175, 0.142, 0.096, 0.160, 0.186, 0.223, 0.296, 0.420, 0.500, 0.611, 0.834, 0.932, 1.293
0, 0, 0, 0.814, 0.646, 0.481, 0.402, 0.270, 0.209, 0.152, 0.121, 0.129, 0.204, 0.247, 0.310, 0.424, 0.550, 0.716, 0.831, 1.044, 1.263
0, 0, 0, 0.882, 0.695, 0.505, 0.389, 0.257, 0.209, 0.150, 0.128, 0.144, 0.249, 0.236, 0.380, 0.489, 0.654, 0.801, 0.947, 1.166, 1.382
0, 0, 0, 0.928, 0.711, 0.551, 0.445, 0.269, 0.203, 0.124, 0.121, 0.152, 0.188, 0.325, 0.384, 0.493, 0.632, 0.872, 1.054, 1.246, 1.543
0, 0, 0, 0.954, 0.769, 0.578, 0.460, 0.285, 0.205, 0.166, 0.161, 0.188, 0.229, 0.305, 0.374, 0.585, 0.743, 0.931, 1.174, 1.476, 1.674

It still does nothing to compensate, when printing.

gloomyandy

@Snippy So are you still having to babystep by -1mm? Does the G30 in the middle of the bed now work? What does G30 s-1 return if you run it in the centre of the bed? Also what is going on at the left hand side of your bed? That height map has all zeros there which seems a little odd.

Snippy

@gloomyandy

So are you still having to babystep by -1mm?
Yes

Does the G30 in the middle of the bed now work?
Yes

What does G30 s-1 return if you run it in the centre of the bed?
G30 s-1
-1.170 mm Mid Z0
-1.080 mm X0 Y0 Z0

what is going on at the left hand side of your bed?
G31 P500 X45 Y0 Z2, Probe cant reatch, too lazy to tweak settings.

gloomyandy

@Snippy said in Z wont go to the corect dept when printing.:

Stopped at height 2.285 mm

That does not seem correct to me. I would have expected that to be returning a value much closer to zero. What did you do to "fix" your heightmap? Are you using the probe to set your Z=0 point? Are you setting that point at the same "centre of the bed " location? Are you sure you have calibrated the probe Z offset correctly? See: https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_testing

Snippy

@gloomyandy
2.285 was a mistake did not Home Z, It is now-1.170 mm Mid Z0

Snippy

@Snippy

From tip to nozzle tip in Z is 2mm
From Nozzle tip to probe in X is 45mm
G31 P500 X45 Y0 Z2

Oh lord, G30 S-1
Stopped at height 4.062 mm
Anything between 1.080mm to 4.062mm On Z0 Midle Platform
After
Calibrate the Z probe trigger height

Make sure the dynamic test is successful (Z probe stops when it senses the bed) before doing this.
Cancel any currently active mesh compensation with M561
Use the X and Y jog buttons to position the nozzle over the centre of the bed
Jog the nozzle down until it is just touching the bed or just gripping a sheet of paper. If the firmware doesn't let you jog it down far enough, send M564 S0 to disable axis limits.
Once you have the nozzle touching the bed, send command G92 Z0 to tell the firmware that the head is at Z=0
Jog the head up by 5 to 10mm
Send command G30 S-1. The nozzle will descend or the bed rise until the probe triggers and the Z height at which the probe stopped will be reported in the console. If you are using a nozzle-contact Z probe, the trigger height will be slightly negative. For any other type of Z probe where the probe triggers before the nozzle contacts the bed, it will be positive.
Repeat from step 5 two or three times to make sure that the trigger height is consistent.
In Duet Web Control, go to Settings -> System Editor and edit the config.g file. Set the Z parameter in the G31 command to the trigger height that was reported. Save the file.
Open config-override.g and check that there are no G31 commands in it. If you find any, delete those lines and save the file.
To apply the new trigger height, restart the Duet by sending M999 or pressing Emergency Stop.

gloomyandy

@Snippy Are you saying that repeated runs of G30 S-1 at the same point on the bed return different results (with no other changes being made between the runs)? If so then it sounds like either there is something wrong with your probe or the way it is mounted.

Snippy

This post is deleted!

droftarts

@Snippy said in Z wont go to the corect dept when printing.:

From tip to nozzle tip in Z is 2mm

Are you measuring the Z offset of the probe in this position, ie when it is retracted? If so, that's wrong. You need to measure the height of the nozzle when the probe is triggered, ie when the probe pin is deployed, and it comes in contact with the bed, which then retracts. The nozzle will be a couple of mm off the bed, and it is this offset you need to measure. The instructions to mount the BLTouch "2mm above the nozzle" is just to make sure it's far enough away from the nozzle when retracted that it doesn't hit the print, but low enough that when it deploys it is below the nozzle, so touches first.

Follow the instructions to determine the Z height that you posted. If the probe isn't consistent in the number it reports from multiple probing (try running the script here: https://forum.duet3d.com/post/335748)

im starting to think that duet in general is just cursed.

Nope.

Ian