Z-probe autoleveling problem

here is what i am using:

#define FEATURE_AUTOLEVEL 1
#define FEATURE_SOFTWARE_LEVELING 0
#define Z_PROBE_X1 8
#define Z_PROBE_Y1 8
#define Z_PROBE_X2 208
#define Z_PROBE_Y2 8
#define Z_PROBE_X3 8
#define Z_PROBE_Y3 208
#define BED_LEVELING_METHOD 1
#define BED_CORRECTION_METHOD 0
#define BED_LEVELING_GRID_SIZE 1
#define BED_LEVELING_REPETITIONS 1

When i use the 3 point leveling (#define FEATURE_AUTOLEVEL 0) it goes to its probe locations fine, but when i set it to the above for a 4 point (grid size 1) it does not work right, it will go to a not quite home position (x8,y8) then zips to the max x and y and just keeps trying to go more till i hit the estop?


Comments

  • Please have a look at eeprom positions. These look good, but eeprom may contain the wrong points not spanning a square but a parallelogram.

  • Here is what i have from in repitier
  • Also looks good. Can you a provide a log output from your autoleveling. Often this helps to see better what is going on.
  • Also can you tell us what size you have for Xmax and Ymax
  • Good: 3 point leveling
    09:03:37.851 : N25 M322*23
    09:03:37.851 : N26 G28*39
    09:03:37.851 : N27 G32 S2*108
    09:03:37.851 : N28 G1 X110 Y125 Z5 F5000*57
    09:03:37.851 : Info:Autolevel matrix reset
    09:03:47.305 : X:-27.00 Y:0.00 Z:247.895 E:0.0000
    09:04:15.900 : Info:Autoleveling disabled
    09:04:26.447 : Z-probe:3.820 X:8.00 Y:8.00
    09:04:39.667 : Z-probe:4.800 X:208.00 Y:8.00
    09:04:50.120 : Z-probe:4.010 X:8.00 Y:208.00
    09:04:50.120 : plane: a = 0.0049 b = 0.0010 c = 3.7732
    09:04:50.136 : Transformation matrix: 0.999988 0.000000 -0.004900 -0.000005 1.000000 -0.000950 0.004900 0.000950 0.999988
    09:04:50.136 : Printer height:247.59
    09:04:50.136 : CurrentZ:3.77 atZ:4.08
    09:04:50.136 : Info:Autoleveling enabled
    09:04:51.120 : X:7.98 Y:208.00 Z:4.007 E:0.0000

    Not so good 4 point
    09:29:45.343 : N16 M322*23
    09:29:45.343 : N17 G28*37
    09:29:45.343 : N18 G32 S2*96
    09:29:45.343 : N19 G1 X110 Y125 Z5 F5000*59
    09:29:45.343 : Info:Autolevel matrix reset
    09:29:48.671 : X:-27.00 Y:0.00 Z:248.000 E:0.0000
    09:30:17.282 : Z correction disabled
    09:30:25.751 : Printer reset detected - initalizing         'me hitting the e-stop as it maxes out the x and y
    09:30:25.751 : start
    09:30:25.751 : Detected EEPROM version:19


    min/max settings:
    09:35:25.150 : EPR:3 133 -27.000 X min pos [mm]
    09:35:25.181 : EPR:3 137 0.000 Y min pos [mm]
    09:35:25.212 : EPR:3 141 0.000 Z min pos [mm]
    09:35:25.243 : EPR:3 145 265.000 X max length [mm]
    09:35:25.275 : EPR:3 149 235.000 Y max length [mm]
    09:35:25.321 : EPR:3 153 248.000 Z max length [mm]


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