Dear Tony
Thank you very much for your elaborate explanation. I have started the same process on my A350. I will post my findings here as well. However, I have a couple of questions;
-
Running G1029A, I got the following responses - see the full response at the end of the post;
It starts off by homing and measuring the X, Y, Z positions (and steps I believe)
For mine, it has X as -17.00 and Y as 352.00. With this, the locations of the Probe and Move are different. I noticed this when using the normal Touch Screen Calibration as well.
This results in the matrix positions not being in the middle of the bed, but with an offset. At the end of the process when it wants to save the Z-offset, it moves to the actual center.
READ: X:-17.00 Y:352.00 Z:328.46 E:0.00 Count X:0 Y:144000 Z:133600
You will notice the differences in ProbeX and Move to X is always 13 and the differences in ProbeY and Move To Y is 19.15
How can I fix this or resolve this to ensure I don’t have an offset in the matrix? Is this offset calculated in the leveling corrections?
Edit: Found the answer to this. Sensor (Probe) is X=13 and Y=19.15 from the nozzle. Thus, although it seems that it is not centered, the sensor/probe is centered -
You mention backlash. Are you referring to the bed backlash? On the A350, there is a very large pitch/roll around the middle of the X-axis. It seems that the sliders in the two Y modules allow for a lot of of rotational movement or play. With the large bed, the downward pressure of the printhead pushes the bed down about 2.0 to 2.5mm. Thus, I am very concerned that correct readings cannot be obtained.
Edit: I followed the link below and lowered my proximity sensor. Now the nozzle doesn’t push the bed down during calibration. It seems that the sensor couldn’t detect my bed without pushing the bed down.
Snapmaker official response to print head gouging? -
Matrix Positions. Is I0J0 the same as Probing No 0? In the normal 3 x 3, is the matrix calculated from X0Y0 or X0Y350? Printing/displaying the matrix values with M420V gives the Z values/offsets, but where can the X and Y values/positions of the corresponding positions be obtained.
Thank you very much for this post. And the new “tools” you opened for some of us.
Regards
Waldo
SENT: G0Z320F6000
READ: ok
SENT: G0X0Y350F6000
READ: ok
SENT: G1029A
READ: new E target temp: 0
READ: new B target temp: 0
READ: new E target temp: 0
READ: leveling OFF
READ: echo:busy: processing
busy: processing
READ: echo:busy: processing
busy: processing
READ: echo:busy: processing
busy: processing
READ: echo:busy: processing
busy: processing
READ: echo:busy: processing
busy: processing
READ: leveling ON
READ: X:-17.00 Y:352.00 Z:328.46 E:0.00 Count X:0 Y:144000 Z:133600
READ: leveling OFF
READ: X:23 - 137
READ: Y:23 - 152
READ: Probing No. 0
READ: ProbeX:40.00 ProbeY:31.00Avtive:1
READ: Move to X: 27.00, Y: 11.85, Z: 15.00
READ: probed z: 5.61
READ: probed z: 5.59
READ: probed z: 5.56
*READ: *
READ: Probing No. 1
READ: ProbeX:177.00 ProbeY:31.00Avtive:1
READ: Move to X: 164.00, Y: 11.85, Z: 10.56
READ: probed z: 5.75
READ: probed z: 5.74
READ: probed z: 5.71
*READ: *
READ: Probing No. 2
READ: ProbeX:314.00 ProbeY:31.00Avtive:1
READ: Move to X: 301.00, Y: 11.85, Z: 10.72
READ: probed z: 6.04
READ: probed z: 6.03
READ: probed z: 5.99
*READ: *
READ: Probing No. 3
READ: ProbeX:314.00 ProbeY:183.00Avtive:1
READ: Move to X: 301.00, Y: 163.85, Z: 10.99
READ: probed z: 5.97
READ: probed z: 6.02
READ: probed z: 5.99
*READ: *
READ: Probing No. 4
READ: ProbeX:314.00 ProbeY:335.00Avtive:1
READ: Move to X: 301.00, Y: 315.85, Z: 10.99
READ: probed z: 3.65
READ: probed z: 5.15
READ: larger clearance between 2 probe!
READ: probed z: 4.33
READ: larger clearance between 2 probe!
*READ: *
READ: Probing No. 5
READ: ProbeX:177.00 ProbeY:335.00Avtive:1
READ: Move to X: 164.00, Y: 315.85, Z: 9.33
READ: probed z: 4.38
READ: probed z: 5.88
READ: larger clearance between 2 probe!
READ: probed z: 4.36
READ: larger clearance between 2 probe!
*READ: *
READ: Probing No. 6
READ: ProbeX:40.00 ProbeY:335.00Avtive:1
READ: Move to X: 27.00, Y: 315.85, Z: 9.35
READ: probed z: 4.49
READ: probed z: 4.55
READ: probed z: 5.55
READ: larger clearance between 2 probe!
*READ: *
READ: Probing No. 7
READ: ProbeX:40.00 ProbeY:183.00Avtive:1
READ: Move to X: 27.00, Y: 163.85, Z: 10.55
READ: probed z: 5.88
READ: probed z: 5.89
READ: probed z: 5.88
*READ: *
READ: Probing No. 8
READ: ProbeX:177.00 ProbeY:183.00Avtive:1
READ: Move to X: 164.00, Y: 163.85, Z: 10.88
READ: probed z: 5.80
READ: probed z: 5.84
READ: probed z: 5.84
*READ: *
READ: ok