I'm near the end of a full electronics swap of a dead 3d printer. I'm using an MKS Gen 1.4 board with Repetier firmware. This is my first try at attempting to set up auto-leveling from scratch.
I've got the inductive probe mounted, positioned and calibrated so that running a G30 (single probe) works perfectly and returns valid results.
However, when I try a G28 (home), then G29 to do a full auto-leveling sequence, just prior to each probing, the Y axis lurches forward (roughly)70 mm, and stays cumulatively out of position by the amount it lurched forward. Since 70mm x 3 is bigger than the depth of my bed (200x200) the Y-axis bangs and grinds against it's physical limit. Additionally, that puts the Z-probe beyond the edge of the bed, which causes the firmware to go into error mode, because the actual z-low limit switch is hit without ever tripping the Z-probe. Which, annoying sends the Z-Axis moving up, until it ultimately crashes into its physical limit and grinds until I kill the power.
- Why is my config causing this lurching behavior? How do I fix it?
- Can the error behavior be configured/changed to NOT attempt infinite movement in the Z+ direction? (It might not matter once #1 is fixed, but I don't like the idea of my printer going into a mode where the Z-stepper could burn itself out if the power isn't flipped.)
Here is the Z-probe section of my config.h:
(Note: I have tried changing Z_PROBE_Y_OFFSET to -75, to see if I was entering the offset incorrectly. It didn't seem to change the behavior noticeably.)
// #################### Z-Probing #####################
#define Z_PROBE_Z_OFFSET 0.2
#define Z_PROBE_Z_OFFSET_MODE 0
#define UI_BED_COATING 1
#define FEATURE_Z_PROBE 1
#define Z_PROBE_BED_DISTANCE 8.0 // Higher than max bed level distance error in mm
#define Z_PROBE_PIN ORIG_Y_MAX_PIN
#define Z_PROBE_PULLUP 0
#define Z_PROBE_ON_HIGH 1
#define Z_PROBE_X_OFFSET 10
#define Z_PROBE_Y_OFFSET 75
#define Z_PROBE_WAIT_BEFORE_TEST 0
#define Z_PROBE_SPEED 5
#define Z_PROBE_XY_SPEED 150
#define Z_PROBE_SWITCHING_DISTANCE 1.5
#define Z_PROBE_REPETITIONS 5 // Repetitions for probing at one point.
#define Z_PROBE_HEIGHT 22.68
#define Z_PROBE_START_SCRIPT "m117 Autoleveling..."
#define Z_PROBE_FINISHED_SCRIPT "m117 Autoleveling Complete"
#define Z_PROBE_REQUIRES_HEATING 0
#define Z_PROBE_MIN_TEMPERATURE 150
#define FEATURE_AUTOLEVEL 1
#define Z_PROBE_X1 20
#define Z_PROBE_Y1 00
#define Z_PROBE_X2 160
#define Z_PROBE_Y2 00
#define Z_PROBE_X3 100
#define Z_PROBE_Y3 120
#define BED_LEVELING_METHOD 1
#define BED_CORRECTION_METHOD 0
#define BED_LEVELING_GRID_SIZE 5
#define BED_LEVELING_REPETITIONS 5
#define BED_MOTOR_1_X 0
#define BED_MOTOR_1_Y 0
#define BED_MOTOR_2_X 200
#define BED_MOTOR_2_Y 0
#define BED_MOTOR_3_X 100
#define BED_MOTOR_3_Y 200
#define BENDING_CORRECTION_A 0
#define BENDING_CORRECTION_B 0
#define BENDING_CORRECTION_C 0
#define FEATURE_AXISCOMP 0
#define AXISCOMP_TANXY 0
#define AXISCOMP_TANYZ 0
Comments