Marlin Autobed leveling

Hi everybody !

I explain my problem:

I have a version of marlin where isn't the feature Auto-leveling. How can I add it ?

Thanks a lot,

Jean-Baptiste

It's not that easy to add autobed level to your Marlin version.
You should get a new Marlin version from github that already has ABL implemented and work from there.
Also look for Rich Cattel's Marlin branch
-Olaf

Thanks for your answer o_lampe !

The problem is that I am using the Ultimaker modificated version for the Ultiboard but It's a new printer, not the real ultimaker printer.
Convert the original marlin version to be totaly compatible with the Ultiboard (screen, new feature on the board,etc...) is I think more complicated than re-add the auto-leveling feature in this modificated marlin version for ultiboard.

Can you or somebody help me to re-implemented the auto-leveling feature ?

Thanks a lot !

Quote
jean-baptiste
Thanks for your answer o_lampe !

The problem is that I am using the Ultimaker modificated version for the Ultiboard but It's a new printer, not the real ultimaker printer.
Convert the original marlin version to be totaly compatible with the Ultiboard (screen, new feature on the board,etc...) is I think more complicated than re-add the auto-leveling feature in this modificated marlin version for ultiboard.

Can you or somebody help me to re-implemented the auto-leveling feature ?

Thanks a lot !

I can not quarentee how this Works, but here is the Marlin fork made for Ultimaker 2 hardware - [github.com]

I have completely change my firmware, I have use the original version of Marlin and configure him for the UM2.
At this I have any problem.

Then I had piezoeletric sensor for auto-leveling. The G29 code work perfectly but when he had finish it, the distance between the Zmin et the bed in the firmware is 22.36mm:

00:17:15.358 : Bed x: 50.00 y: 50.00 z: 18.92
00:17:16.968 : Bed x: 100.00 y: 50.00 z: 19.25
00:17:18.578 : Bed x: 150.00 y: 50.00 z: 19.60
00:17:19.958 : Bed x: 150.00 y: 100.00 z: 22.01
00:17:21.420 : Bed x: 100.00 y: 100.00 z: 21.60
00:17:23.034 : Bed x: 50.00 y: 100.00 z: 20.20
00:17:24.464 : Bed x: 50.00 y: 150.00 z: 21.50
00:17:25.914 : Bed x: 100.00 y: 150.00 z: 21.92
00:17:27.376 : Bed x: 150.00 y: 150.00 z: 22.35
00:17:27.385 : Eqn coefficients: a: 0.01 b: 0.03 d: 17.03
00:17:27.388 : planeNormal x: -0.01 y: -0.03 z: 1.00
00:17:27.389 : echo:endstops hit:  Z:22.36

whereas it is only in real the 4mm configured in marlin...

Why ? Where is the problem in marlin ?

//============================= Bed Auto Leveling ===========================

#define ENABLE_AUTO_BED_LEVELING // Delete the comment to enable (remove // at the start of the line)
#define Z_PROBE_REPEATABILITY_TEST  // If not commented out, Z-Probe Repeatability test will be included if Auto Bed Leveling is Enabled.

#ifdef ENABLE_AUTO_BED_LEVELING

// There are 2 different ways to pick the X and Y locations to probe:

//  - "grid" mode
//    Probe every point in a rectangular grid
//    You must specify the rectangle, and the density of sample points
//    This mode is preferred because there are more measurements.
//    It used to be called ACCURATE_BED_LEVELING but "grid" is more descriptive

//  - "3-point" mode
//    Probe 3 arbitrary points on the bed (that aren't colinear)
//    You must specify the X & Y coordinates of all 3 points

  #define AUTO_BED_LEVELING_GRID
  // with AUTO_BED_LEVELING_GRID, the bed is sampled in a
  // AUTO_BED_LEVELING_GRID_POINTSxAUTO_BED_LEVELING_GRID_POINTS grid
  // and least squares solution is calculated
  // Note: this feature occupies 10'206 byte
  #ifdef AUTO_BED_LEVELING_GRID

    // set the rectangle in which to probe
    #define LEFT_PROBE_BED_POSITION 50
    #define RIGHT_PROBE_BED_POSITION 150
    #define BACK_PROBE_BED_POSITION 150
    #define FRONT_PROBE_BED_POSITION 50

     // set the number of grid points per dimension
     // I wouldn't see a reason to go above 3 (=9 probing points on the bed)
    #define AUTO_BED_LEVELING_GRID_POINTS 3


  #else  // not AUTO_BED_LEVELING_GRID
    // with no grid, just probe 3 arbitrary points.  A simple cross-product
    // is used to esimate the plane of the print bed

      #define ABL_PROBE_PT_1_X 15
      #define ABL_PROBE_PT_1_Y 180
      #define ABL_PROBE_PT_2_X 15
      #define ABL_PROBE_PT_2_Y 20
      #define ABL_PROBE_PT_3_X 170
      #define ABL_PROBE_PT_3_Y 20

  #endif // AUTO_BED_LEVELING_GRID


  // these are the offsets to the probe relative to the extruder tip (Hotend - Probe)
  // X and Y offsets must be integers
  #define X_PROBE_OFFSET_FROM_EXTRUDER 0
  #define Y_PROBE_OFFSET_FROM_EXTRUDER 0
  #define Z_PROBE_OFFSET_FROM_EXTRUDER 0

  #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 8000         // X and Y axis travel speed between probes, in mm/min

  #define Z_RAISE_BEFORE_PROBING 15    //How much the extruder will be raised before traveling to the first probing point.
  #define Z_RAISE_BETWEEN_PROBINGS 5  //How much the extruder will be raised when traveling from between next probing points

  //#define Z_PROBE_SLED // turn on if you have a z-probe mounted on a sled like those designed by Charles Bell
  //#define SLED_DOCKING_OFFSET 5 // the extra distance the X axis must travel to pickup the sled. 0 should be fine but you can push it further if you'd like.

  //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

  #ifdef AUTO_BED_LEVELING_GRID	// Check if Probe_Offset * Grid Points is greater than Probing Range
    #if X_PROBE_OFFSET_FROM_EXTRUDER < 0
      #if (-(X_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
	     #error "The X axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
	  #endif
	#else
      #if ((X_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
	     #error "The X axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
	  #endif
	#endif
    #if Y_PROBE_OFFSET_FROM_EXTRUDER < 0
      #if (-(Y_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
	     #error "The Y axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
	  #endif
	#else
      #if ((Y_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
	     #error "The Y axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
	  #endif
	#endif

	
  #endif
  
#endif // ENABLE_AUTO_BED_LEVELING

Thanks a lot !

Edited 4 time(s). Last edit at 11/23/2015 06:30PM by jean-baptiste.

I had the same issue, which was due to Z_PROBE_OFFSET_FROM_EXTRUDER i can see you have set all three offsets at 0. Try configuring them, and see if it fixes the issue

On my UM2 clone, with an IR sensor on front, I have the following

// these are the offsets to the probe relative to the extruder tip (Hotend - Probe)
  // X and Y offsets must be integers
  #define X_PROBE_OFFSET_FROM_EXTRUDER -8
  #define Y_PROBE_OFFSET_FROM_EXTRUDER -15
  #define Z_PROBE_OFFSET_FROM_EXTRUDER -2  // default is like -15 or -20 or so, which would correspond to your situation

All that said, I failed to get Auto-level to Work properly on RC and had to revert back to stable. Now it Works perfectly.

---

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Hello !

Thanks for you answer, I have corrected this problem.

Edited 1 time(s). Last edit at 12/03/2015 03:07PM by jean-baptiste.