Error Auto Bed Leveling "home X/Y before Z"

Hello everyone,

I'm having problems to implement Auto Bed Leveling. I'm using a home made, customised 3D-printer (double extruder) running a Marlin Firmware (v.1.1.0 RC 3) and a Repetier Host Software (v.1.6.0). For Zmin I'm using an inductive sensor (normally open) from Sick (IME08-04NPS-ZT0K) .

My problem is that the probing is not starting. As soon as I'm starting a print the X and Y axis are homing. Afterwards the print bed is moving under the extruder, where the sensor is mounted. Then the Z axis is homing. Now the probing should start, but nothing happens. I'm just getting an error message that says "home X/Y before Z". After a while (I think after a timeout) the printer is starting to print without having executed the G29.

Do you have an idea how I can get the Auto Bed Leveling running?

My Slicer's startcode (Slic3r) looks the following:
G28 ; home all axes
G29 ; Auto Level

I also tried (without any better result):
G28 X0 Y0
G29

In my log it's written the following:

17:33:29.837 : Compiled: Dec 7 2015
17:33:29.837 : echo: Free Memory: 4926 PlannerBufferBytes: 1232
17:33:29.837 : echo:Hardcoded Default Settings Loaded
17:33:29.837 : echoconfused smileyteps per unit:
17:33:29.837 : echo: M92 X59.26 Y59.26 Z2560.00 E455.00
17:33:29.837 : echo:Maximum feedrates (mm/s):
17:33:29.837 : echo: M203 X200.00 Y200.00 Z2.00 E25.00
17:33:29.847 : echo:Maximum Acceleration (mm/s2):
17:33:29.847 : echo: M201 X1000 Y1000 Z100 E10000
17:33:29.847 : echo:Accelerations: P=printing, R=retract and T=travel
17:33:29.847 : echo: M204 P1000.00 R1000.00 T1000.00
17:33:29.857 : echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
17:33:29.857 : echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
17:33:29.857 : echo:Home offset (mm):
17:33:29.857 : echo: M206 X0.00 Y0.00 Z0.00
17:33:29.857 : echotongue sticking out smileyID settings:
17:33:29.867 : echo: M301 P22.20 I1.08 D114.00 C100.00 L20
17:33:29.867 : echo:Filament settings: Disabled
17:33:29.867 : echo: M200 D3.00
17:33:29.867 : echo: M200 T1 D3.00
17:33:29.867 : echo: M200 D0
17:33:29.867 : echo:Z-Probe Offset (mm):
17:33:29.867 : echo: M851 Z-2.00
17:33:30.209 : FIRMWARE_NAME:Marlin 1.1.0-RC3 From Archive SOURCE_CODE_URL:http:// ... PROTOCOL_VERSION:1.0 MACHINE_TYPE:3D Printer EXTRUDER_COUNT:2 UUID:00000000-0000-0000-0000-000000000000
17:33:30.259 : X:0.00 Y:0.00 Z:0.00 E:0.00 Count X: 0.00 Y:0.00 Z:0.00
17:33:30.269 : echo:Active Extruder: 0
17:33:30.299 : echo:Active Extruder: 0
17:34:07.006 : echo:Home X/Y before Z
17:39:30.625 : Starte Objektanalyse ...
17:39:30.635 : Objekt ist mannigfaltig.
17:39:30.635 : Analyse beendet.
17:39:33.350 : Slic3r command:C:\Program Files\Repetier-Host\Slic3r\slic3r.exe --load "slic3r_settings.ini" --print-center 100.00,100.00 -o "composition.gcode" "composition.amf"
17:39:33.820 : => Processing triangulated mesh
17:39:33.820 : => Generating perimeters
17:39:33.970 : => Preparing infill
17:39:34.000 : => Infilling layers
17:39:34.160 : => Generating skirt
17:39:34.160 : => Exporting G-code to composition.gcode
17:39:34.350 : Done. Process took 0 minutes and 0.540 seconds
17:39:34.350 : Filament required: 71.7mm (0.5cm3)
17:41:02.378 : echo:Home X/Y before Z
17:41:12.478 : Drucke Layer 1 von 100
17:41:17.481 : Printer reset detected - initalizing
17:41:17.481 : start
17:41:17.481 : echo:Marlin 1.1.0-RC3
17:41:17.481 : echo: Last Updated: 2015-12-01 12:00 | Author: (Benedikt Kreis, Auto-Bed-Leveling config)
17:41:17.482 : Compiled: Dec 7 2015
17:41:17.482 : echo: Free Memory: 4926 PlannerBufferBytes: 1232
17:41:17.482 : echo:Hardcoded Default Settings Loaded
17:41:17.482 : echoconfused smileyteps per unit:
17:41:17.484 : echo: M92 X59.26 Y59.26 Z2560.00 E455.00
17:41:17.484 : echo:Maximum feedrates (mm/s):
17:41:17.505 : echo: M203 X200.00 Y200.00 Z2.00 E25.00
17:41:17.505 : echo:Maximum Acceleration (mm/s2):
17:41:17.505 : echo: M201 X1000 Y1000 Z100 E10000
17:41:17.505 : echo:Accelerations: P=printing, R=retract and T=travel
17:41:17.505 : echo: M204 P1000.00 R1000.00 T1000.00
17:41:17.515 : echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
17:41:17.515 : echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
17:41:17.515 : echo:Home offset (mm):
17:41:17.515 : echo: M206 X0.00 Y0.00 Z0.00
17:41:17.515 : echotongue sticking out smileyID settings:
17:41:17.525 : echo: M301 P22.20 I1.08 D114.00 C100.00 L20
17:41:17.525 : echo:Filament settings: Disabled
17:41:17.525 : echo: M200 D3.00
17:41:17.525 : echo: M200 T1 D3.00
17:41:17.525 : echo: M200 D0
17:41:17.525 : echo:Z-Probe Offset (mm):
17:41:17.525 : echo: M851 Z-2.00



In my config.h the following entries are made for the Auto-Bed-Leveling:

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

// @section bedlevel

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

#if ENABLED(AUTO_BED_LEVELING_FEATURE)

// There are 2 different ways to specify probing locations:
//
// - "grid" mode
// Probe several points in a rectangular grid.
// You specify the rectangle and the density of sample points.
// This mode is preferred because there are more measurements.
//
// - "3-point" mode
// Probe 3 arbitrary points on the bed (that aren't colinear)
// You specify the XY coordinates of all 3 points.

// Enable this to sample the bed in a grid (least squares solution).
// Note: this feature generates 10KB extra code size.
#define AUTO_BED_LEVELING_GRID

#if ENABLED(AUTO_BED_LEVELING_GRID)

#define LEFT_PROBE_BED_POSITION 50
#define RIGHT_PROBE_BED_POSITION 150
#define FRONT_PROBE_BED_POSITION 50
#define BACK_PROBE_BED_POSITION 150

#define MIN_PROBE_EDGE 10 // The Z probe minimum square sides can be no smaller than this.

// Set the number of grid points per dimension.
// You probably don't need more than 3 (squared=9).
#define AUTO_BED_LEVELING_GRID_POINTS 2 // 2 = 4 points; 3 = 9 points

#else // !AUTO_BED_LEVELING_GRID

// Arbitrary points to probe.
// A simple cross-product is used to estimate the plane of the bed.
#define ABL_PROBE_PT_1_X 100
#define ABL_PROBE_PT_1_Y 50
#define ABL_PROBE_PT_2_X 150
#define ABL_PROBE_PT_2_Y 150
#define ABL_PROBE_PT_3_X 50
#define ABL_PROBE_PT_3_Y 150

#endif // AUTO_BED_LEVELING_GRID

// Offsets to the Z probe relative to the nozzle tip.
// X and Y offsets must be integers.
#define X_PROBE_OFFSET_FROM_EXTRUDER 27 // Z probe to nozzle X offset: -left +right
#define Y_PROBE_OFFSET_FROM_EXTRUDER 30 // Z probe to nozzle Y offset: -front +behind
#define Z_PROBE_OFFSET_FROM_EXTRUDER -2 // Z probe to nozzle Z offset: -below (always!)

#define Z_RAISE_BEFORE_HOMING 4 // (in mm) Raise Z axis before homing (G28) for Z probe clearance.
// Be sure you have this distance over your Z_MAX_POS in case.

#define XY_TRAVEL_SPEED 4000 // X and Y axis travel speed between probes, in mm/min.

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

//#define Z_PROBE_END_SCRIPT "G1 Z10 F12000\nG1 X15 Y330\nG1 Z0.5\nG1 Z10" // These commands will be executed in the end of G29 routine.
// Useful to retract a deployable Z probe.

//#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 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 Z 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 Z probe in a defined XY point before Z Homing when homing all axis (G28).
// - Block Z homing only when the Z probe is outside bed area.

#if ENABLED(Z_SAFE_HOMING)

#define Z_SAFE_HOMING_X_POINT ((X_MIN_POS + X_MAX_POS) / 2) // X point for Z homing when homing all axis (G28).
#define Z_SAFE_HOMING_Y_POINT ((Y_MIN_POS + Y_MAX_POS) / 2) // Y point for Z homing when homing all axis (G28).

#endif

// Support for a dedicated Z probe endstop separate from the Z min endstop.
// If you would like to use both a Z probe and a Z min endstop together,
// uncomment #define Z_MIN_PROBE_ENDSTOP and read the instructions below.
// If you still want to use the Z min endstop for homing, disable Z_SAFE_HOMING above.
// Example: To park the head outside the bed area when homing with G28.
//
// WARNING:
// The Z min endstop will need to set properly as it would without a Z probe
// to prevent head crashes and premature stopping during a print.
//
// To use a separate Z probe endstop, you must have a Z_MIN_PROBE_PIN
// defined in the pins_XXXXX.h file for your control board.
// If you are using a servo based Z probe, you will need to enable NUM_SERVOS,
// Z_ENDSTOP_SERVO_NR and SERVO_ENDSTOP_ANGLES in the R/C SERVO support below.
// RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin
// in the Aux 4 section of the RAMPS board. Use 5V for powered sensors,
// otherwise connect to ground and D32 for normally closed configuration
// and 5V and D32 for normally open configurations.
// Normally closed configuration is advised and assumed.
// The D32 pin in Aux 4 on RAMPS maps to the Arduino D32 pin.
// Z_MIN_PROBE_PIN is setting the pin to use on the Arduino.
// Since the D32 pin on the RAMPS maps to D32 on Arduino, this works.
// D32 is currently selected in the RAMPS 1.3/1.4 pin file.
// All other boards will need changes to the respective pins_XXXXX.h file.
//
// WARNING:
// Setting the wrong pin may have unexpected and potentially disastrous outcomes.
// Use with caution and do your homework.
//
//#define Z_MIN_PROBE_ENDSTOP

#endif // AUTO_BED_LEVELING_FEATURE

Start by manually (with your hand) moving the X and Y axes toward the center of the bed, then run the following commands:

G28 X (should zero the X axis)
M114 (returns the current coordinates >> Should show X=0.00)


G28 X (should zero the Y axis)
M114 (returns the current coordinates >> Should show Y=0.00)

M119 (checks the status of all endstops >> Should show X and Y triggered and Z open)

Let me know what you find and we'll go from there...

Edited 1 time(s). Last edit at 12/14/2015 04:35PM by MindRealm.

---

-David

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I tried it out and the result is exactly what you've said.

Here is what was written in the log file:
18:15:25.347 : X:0.00 Y:0.00 Z:0.00 E:0.00 Count X: 0.00 Y:0.00 Z:0.00
18:15:57.993 : X:0.00 Y:0.00 Z:0.00 E:0.00 Count X: 0.00 Y:0.00 Z:0.00
18:16:16.847 : Reporting endstop status
18:16:16.847 : x_min: TRIGGERED
18:16:16.847 : x_max: open
18:16:16.847 : y_min: TRIGGERED
18:16:16.847 : y_max: open
18:16:16.847 : z_min: open
18:16:16.857 : z_max: open

So what can I do now?

???