This is mystifying me.
Using Marlin firmware that came with my Sintron Mini Kossel, been running fine for months. Self levelling probe was doing what it is supposed to. Printing speed and quality was impressive.
Short story, changed hotend for ED3, decided to reset everything as the ED3 was shorter than the original one, and I installed bed clamps to get the bed pretty much level to the towers.
Did an M666 to get the tower Z offsets onto the Arduino.
No problems with any of that but somewhere along the way the Z probe decided to have tantrums.
It does not probe the initial probe point?
I have tried various probe settings, this is one of them, set to 3x3. They all do the same, in one area of the bed, the probe rises instead of dropping to the bed, so it records an abnormal z height.
If I set it to 8x8 it will skip probing each time it gets to that bed area, which is in front of the Z tower.
I was intending to install 1.1.4, but as 2.0 is due I thought I would hold off so that I only have to create a config.h once. The installed version was doing an excellent job, like I said it was printing perfectly until I started re-configuring it.
Can anyone point me in the right direction? I am using a glass bed, allen key probe, no heated bed or alloy plate at all, it is clamped to the 2020 rails via printed brackets.
Cheers
Rob
SENDING:G29
Bed x: 50.00 y: -50.00 z: 93.20 <<<<<<< Problem
Bed x: 0.00 y: -50.00 z: 3.31
Bed x: -50.00 y: -50.00 z: 2.80
Bed x: -50.00 y: 0.00 z: 2.73
Bed x: 0.00 y: 0.00 z: 3.38
Bed x: 50.00 y: 0.00 z: 3.32
Bed x: 50.00 y: 50.00 z: 2.65
Bed x: 0.00 y: 50.00 z: 2.55
Bed x: -50.00 y: 50.00 z: 2.06
-0.60 -0.09 89.80
-0.67 -0.02 -0.08
-1.34 -0.85 -0.75
This is my Marlin config:
//============================= Bed Auto Leveling ===========================
#define ENABLE_AUTO_BED_LEVELING // Delete the comment to enable (remove // at the start of the line)
#ifdef ENABLE_AUTO_BED_LEVELING
// these are the positions on the bed to do the probing
#define DELTA_PROBABLE_RADIUS (DELTA_PRINTABLE_RADIUS-30)
#define LEFT_PROBE_BED_POSITION -DELTA_PROBABLE_RADIUS
#define RIGHT_PROBE_BED_POSITION DELTA_PROBABLE_RADIUS
#define BACK_PROBE_BED_POSITION DELTA_PROBABLE_RADIUS
#define FRONT_PROBE_BED_POSITION -DELTA_PROBABLE_RADIUS
// these are the offsets to the probe relative to the extruder tip (Hotend - Probe)
#define X_PROBE_OFFSET_FROM_EXTRUDER 4.0
#define Y_PROBE_OFFSET_FROM_EXTRUDER -14.0
#define Z_PROBE_OFFSET_FROM_EXTRUDER -3.40
#define Z_RAISE_BEFORE_HOMING 4 // (in mm) Raise Z before homing (G28) for Probe Clearance.
// Be sure you have this distance over your Z_MAX_POS in case
#define XY_TRAVEL_SPEED 6000 // X and Y axis travel speed between probes, in mm/min
#define Z_RAISE_BEFORE_PROBING 100 //How much the extruder will be raised before traveling to the first probing point.
#define Z_RAISE_BETWEEN_PROBINGS 6 //How much the extruder will be raised when traveling from between next probing points
//If defined, the Probe servo will be turned on only during movement and then turned off to avoid jerk
//The value is the delay to turn the servo off after powered on - depends on the servo speed; 300ms is good value, but you can try lower it.
// You MUST HAVE the SERVO_ENDSTOPS defined to use here a value higher than zero otherwise your code will not compile.
// #define PROBE_SERVO_DEACTIVATION_DELAY 300
//If you have enabled the Bed Auto Leveling and are using the same Z Probe for Z Homing,
//it is highly recommended you let this Z_SAFE_HOMING enabled!!
#define Z_SAFE_HOMING // This feature is meant to avoid Z homing with probe outside the bed area.
// When defined, it will:
// - Allow Z homing only after X and Y homing AND stepper drivers still enabled
// - If stepper drivers timeout, it will need X and Y homing again before Z homing
// - Position the probe in a defined XY point before Z Homing when homing all axis (G28)
// - Block Z homing only when the probe is outside bed area.
#ifdef Z_SAFE_HOMING
#define Z_SAFE_HOMING_X_POINT (X_MAX_LENGTH/2) // X point for Z homing when homing all axis (G28)
#define Z_SAFE_HOMING_Y_POINT (Y_MAX_LENGTH/2) // Y point for Z homing when homing all axis (G28)
#endif
// with accurate bed leveling, the bed is sampled in a ACCURATE_BED_LEVELING_POINTSxACCURATE_BED_LEVELING_POINTS grid and least squares solution is calculated
// Note: this feature occupies 10'206 byte
#define ACCURATE_BED_LEVELING
#ifdef ACCURATE_BED_LEVELING
#define ACCURATE_BED_LEVELING_POINTS 3
#define ACCURATE_BED_LEVELING_GRID_X ((RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION) / (ACCURATE_BED_LEVELING_POINTS - 1))
#define ACCURATE_BED_LEVELING_GRID_Y ((BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION) / (ACCURATE_BED_LEVELING_POINTS - 1))
// NONLINEAR_BED_LEVELING means: don't try to calculate linear coefficients but instead
// compensate by interpolating between the nearest four Z probe values for each point.
// Useful for deltabots where the print surface may appear like a bowl or dome shape.
// Works best with ACCURATE_BED_LEVELING_POINTS 5 or higher.
#define NONLINEAR_BED_LEVELING
#endif
#endif
//******
