Auto Bed Levelling Isn't correcting Enough

ert

Hello, i build a „normal“ 3d Printer (no Delta) and have trouble with the auto bed levelling.

First I’m using a wood Bed with Double-sided adhesive tape without bed levelling. That works more or less fine for the first test runs.

Now I buy a proper bed with blue Tape on it and enable auto bed levelling and attached a reflection light sensor to the Z-Axis. After that a reflection Laser sensor and then a normal switch.

Then I’m using

M321

M322

G28

G0 X124 Y167 Z30

G32

M320 S2

At the end, the Z-Axis is moving wen the X- and Y-Axis are moving.so far so good now I have the issue that the Z-Axis is not moving enough.

On the 4 corners the high is perfect, but on the middle of the bed, the nozzle is over 0.5mm to high.

My Bed is ok but the Y-Axis has Construction-related a curve J

Now the question what can I still do?

extra information:

this is my first forum post on English so Excuses this.

Repetier-Firmware 1.0.0dev

Repetier-Host V1.6.2

Data from eprom:

X-axisstepspermm : 400.000

Y-axisstepspermm : 400.000

Z-axisstepspermm : 3.948.148

X-axismax.feedrate[mm/s] : 200.000

Y-axismax.feedrate[mm/s] : 200.000

Z-axismax.feedrate[mm/s] : 15.000

X-axishomingfeedrate[mm/s] : 40.000

Y-axishomingfeedrate[mm/s] : 40.000

Z-axishomingfeedrate[mm/s] : 10.000

Max.jerk[mm/s] : 20.000

Max.Z-jerk[mm/s] : 0.712

Xminpos[mm] : 0.000

Yminpos[mm] : 0.000

Zminpos[mm] : 0.000

Xmaxlength[mm] : 300.000

Ymaxlength[mm] : 300.000

Zmaxlength[mm] : 355.690

X-axisacceleration[mm/s²] : 1.000.000

Y-axisacceleration[mm/s²] : 1.000.000

Z-axisacceleration[mm/s²] : 100.000

X-axistravelacceleration[mm/s²] : 1.000.000

Y-axistravelacceleration[mm/s²] : 1.000.000

Z-axistravelacceleration[mm/s²] : 100.000

Coatingthickness[mm] : 0.000

Z-probeheight[mm] : 5.000

Max.z-probe-beddist.[mm] : 10.000

Z-probespeed[mm/s] : 3.000

Z-probex-y-speed[mm/s] : 160.000

Z-probeoffsetx[mm] : 31.000

Z-probeoffsety[mm] : 30.000

Z-probeX1[mm] : 31.000

Z-probeY1[mm] : 31.000

Z-probeX2[mm] : 260.000

Z-probeY2[mm] : 31.000

Z-probeX3[mm] : 31.000

Z-probeY3[mm] : 260.000

Z-probebendingcorrectionA[mm] : 0.000

Z-probebendingcorrectionB[mm] : 0.000

Z-probebendingcorrectionC[mm] : 0.000

Autolevelactive(1/0) : 1

Enableretractionconversion[0/1] : 0

Retractionlength[mm] : 0.000

Retractionspeed[mm/s] : 40.000

Retractionz-lift[mm] : 0.000

Extraextrusiononundoretract[mm] : 0.000

Retractionundospeed : 20.000

MartinH

G32 levelling is if your bed is 'flat'. it seems like you have a concave bed where the centre is lower than the corners,

for this type of levelling you need to use G33 mesh levelling.

ert

Thangs for that advice.

After enabling distortion correction and correcting the x and y coordinates on my Printer??s firmware hi is testing the grid and give me some output on the console, but when I move the x and y Axes the Z Axes do??s nothing.

21:18:05.367 : Z correction disabled

21:18:05.371 : Reference Z for measurement:15.000

21:18:13.325 : X:0.00 Y:0.00 Z:0.000 E:0.0000

21:18:30.810 : Z-probe:36.582 X:30.00 Y:290.00

21:18:43.675 : Z-probe:35.346 X:95.00 Y:290.00

21:18:56.553 : Z-probe:35.386 X:160.00 Y:290.00

21:19:09.406 : Z-probe:35.310 X:225.00 Y:290.00

21:19:22.164 : Z-probe:35.090 X:290.00 Y:290.00

21:19:36.999 : Z-probe:37.109 X:30.00 Y:225.00

21:19:50.479 : Z-probe:36.881 X:95.00 Y:225.00

21:20:03.913 : Z-probe:36.767 X:160.00 Y:225.00

21:20:17.282 : Z-probe:36.615 X:225.00 Y:225.00

21:20:30.593 : Z-probe:36.463 X:290.00 Y:225.00

21:20:45.572 : Z-probe:37.466 X:30.00 Y:160.00

21:20:59.215 : Z-probe:37.291 X:95.00 Y:160.00

21:21:12.821 : Z-probe:37.205 X:160.00 Y:160.00

21:21:26.398 : Z-probe:37.121 X:225.00 Y:160.00

21:21:39.935 : Z-probe:37.028 X:290.00 Y:160.00

21:21:54.873 : Z-probe:37.372 X:30.00 Y:95.00

21:22:08.500 : Z-probe:37.253 X:95.00 Y:95.00

21:22:22.114 : Z-probe:37.220 X:160.00 Y:95.00

21:22:35.712 : Z-probe:37.177 X:225.00 Y:95.00

21:22:49.290 : Z-probe:37.126 X:290.00 Y:95.00

21:23:04.097 : Z-probe:37.043 X:30.00 Y:30.00

21:23:17.629 : Z-probe:37.015 X:95.00 Y:30.00

21:23:31.141 : Z-probe:36.964 X:160.00 Y:30.00

21:23:44.653 : Z-probe:36.972 X:225.00 Y:30.00

21:23:58.162 : Z-probe:36.952 X:290.00 Y:30.00

21:23:58.956 : Info:Distortion correction matrix:

21:23:58.960 : -8521, -8033, -8049, -8019, -7932

21:23:58.965 : -8729, -8639, -8594, -8534, -8474

21:23:58.969 : -8870, -8801, -8767, -8734, -8697

21:23:58.969 : -8833, -8786, -8773, -8756, -8736

21:23:58.973 : -8703, -8692, -8672, -8675, -8667

21:23:58.977 : G33 X30.00 Y30.00 Z-22.043

21:23:58.977 : G33 X30.00 Y95.00 Z-22.373

21:23:58.981 : G33 X30.00 Y160.00 Z-22.466

21:23:58.981 : G33 X30.00 Y225.00 Z-22.109

21:23:58.985 : G33 X30.00 Y290.00 Z-21.582

21:23:58.989 : G33 X95.00 Y30.00 Z-22.015

21:23:58.989 : G33 X95.00 Y95.00 Z-22.253

21:23:58.993 : G33 X95.00 Y160.00 Z-22.291

21:23:58.993 : G33 X95.00 Y225.00 Z-21.881

21:23:58.997 : G33 X95.00 Y290.00 Z-20.346

21:23:59.001 : G33 X160.00 Y30.00 Z-21.965

21:23:59.001 : G33 X160.00 Y95.00 Z-22.221

21:23:59.006 : G33 X160.00 Y160.00 Z-22.205

21:23:59.006 : G33 X160.00 Y225.00 Z-21.767

21:23:59.010 : G33 X160.00 Y290.00 Z-20.387

21:23:59.014 : G33 X225.00 Y30.00 Z-21.972

21:23:59.014 : G33 X225.00 Y95.00 Z-22.177

21:23:59.018 : G33 X225.00 Y160.00 Z-22.122

21:23:59.022 : G33 X225.00 Y225.00 Z-21.615

21:23:59.022 : G33 X225.00 Y290.00 Z-20.311

21:23:59.026 : G33 X290.00 Y30.00 Z-21.952

21:23:59.026 : G33 X290.00 Y95.00 Z-22.127

21:23:59.030 : G33 X290.00 Y160.00 Z-22.028

21:23:59.034 : G33 X290.00 Y225.00 Z-21.463

21:23:59.034 : G33 X290.00 Y290.00 Z-20.090

21:23:59.038 : Z correction enabled

ert

aaaaaah sorry.

If you set the DISTORTION_END_HEIGHT at 0 it is normal that hi is do??s nothin.

Now it is working just fine. thank you again for the help.