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Z Axis Safe Homing when using Z Probe

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Recommended for those who are using the Z Probe for Z Homing (as
Z-Endstop)

This feature has two changes:

1) Allow user to choose where the Z Probe will touch the bed when homing
all axis together (G28) by setting below defines:

Z_SAFE_HOMING_X_POINT
Z_SAFE_HOMING_Y_POINT

2) Prevents the user to perform Z Axis Homing when the Z Probe is
outsite bed.
2.0.x
Alex Borro 11 years ago
parent 35905ea4f9
commit b33375d438
4 changed files with 128 additions and 35 deletions
Show Stats Download Patch File Download Diff File

40
Marlin/Configuration.h
Unescape Escape View File

@ -305,6 +305,17 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
#define min_software_endstops true // If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true // If true, axis won't move to coordinates greater than the defined lengths below.
// Travel limits after homing
#define X_MAX_POS 205
#define X_MIN_POS 0
#define Y_MAX_POS 205
#define Y_MIN_POS 0
#define Z_MAX_POS 200
#define Z_MIN_POS 0
#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)
//============================= Bed Auto Leveling ===========================
//#define ENABLE_AUTO_BED_LEVELING // Delete the comment to enable (remove // at the start of the line)
@ -336,20 +347,27 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
// 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 Levelling 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
#endif
// Travel limits after homing
#define X_MAX_POS 205
#define X_MIN_POS 0
#define Y_MAX_POS 205
#define Y_MIN_POS 0
#define Z_MAX_POS 200
#define Z_MIN_POS 0
#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)
// The position of the homing switches
//#define MANUAL_HOME_POSITIONS // If defined, MANUAL_*_HOME_POS below will be used

13
Marlin/Marlin.h
Unescape Escape View File

@ -107,10 +107,10 @@ void manage_inactivity();
#if defined(DUAL_X_CARRIAGE) && defined(X_ENABLE_PIN) && X_ENABLE_PIN > -1 \
&& defined(X2_ENABLE_PIN) && X2_ENABLE_PIN > -1
#define enable_x() do { WRITE(X_ENABLE_PIN, X_ENABLE_ON); WRITE(X2_ENABLE_PIN, X_ENABLE_ON); } while (0)
#define disable_x() do { WRITE(X_ENABLE_PIN,!X_ENABLE_ON); WRITE(X2_ENABLE_PIN,!X_ENABLE_ON); } while (0)
#define disable_x() do { WRITE(X_ENABLE_PIN,!X_ENABLE_ON); WRITE(X2_ENABLE_PIN,!X_ENABLE_ON); axis_known_position[X_AXIS] = false; } while (0)
#elif defined(X_ENABLE_PIN) && X_ENABLE_PIN > -1
#define enable_x() WRITE(X_ENABLE_PIN, X_ENABLE_ON)
#define disable_x() WRITE(X_ENABLE_PIN,!X_ENABLE_ON)
#define disable_x() { WRITE(X_ENABLE_PIN,!X_ENABLE_ON); axis_known_position[X_AXIS] = false; }
#else
#define enable_x() ;
#define disable_x() ;
@ -119,10 +119,10 @@ void manage_inactivity();
#if defined(Y_ENABLE_PIN) && Y_ENABLE_PIN > -1
#ifdef Y_DUAL_STEPPER_DRIVERS
#define enable_y() { WRITE(Y_ENABLE_PIN, Y_ENABLE_ON); WRITE(Y2_ENABLE_PIN, Y_ENABLE_ON); }
#define disable_y() { WRITE(Y_ENABLE_PIN,!Y_ENABLE_ON); WRITE(Y2_ENABLE_PIN, !Y_ENABLE_ON); }
#define disable_y() { WRITE(Y_ENABLE_PIN,!Y_ENABLE_ON); WRITE(Y2_ENABLE_PIN, !Y_ENABLE_ON); axis_known_position[Y_AXIS] = false; }
#else
#define enable_y() WRITE(Y_ENABLE_PIN, Y_ENABLE_ON)
#define disable_y() WRITE(Y_ENABLE_PIN,!Y_ENABLE_ON)
#define disable_y() { WRITE(Y_ENABLE_PIN,!Y_ENABLE_ON); axis_known_position[Y_AXIS] = false; }
#endif
#else
#define enable_y() ;
@ -132,10 +132,10 @@ void manage_inactivity();
#if defined(Z_ENABLE_PIN) && Z_ENABLE_PIN > -1
#ifdef Z_DUAL_STEPPER_DRIVERS
#define enable_z() { WRITE(Z_ENABLE_PIN, Z_ENABLE_ON); WRITE(Z2_ENABLE_PIN, Z_ENABLE_ON); }
#define disable_z() { WRITE(Z_ENABLE_PIN,!Z_ENABLE_ON); WRITE(Z2_ENABLE_PIN,!Z_ENABLE_ON); }
#define disable_z() { WRITE(Z_ENABLE_PIN,!Z_ENABLE_ON); WRITE(Z2_ENABLE_PIN,!Z_ENABLE_ON); axis_known_position[Z_AXIS] = false; }
#else
#define enable_z() WRITE(Z_ENABLE_PIN, Z_ENABLE_ON)
#define disable_z() WRITE(Z_ENABLE_PIN,!Z_ENABLE_ON)
#define disable_z() { WRITE(Z_ENABLE_PIN,!Z_ENABLE_ON); axis_known_position[Z_AXIS] = false; }
#endif
#else
#define enable_z() ;
@ -209,6 +209,7 @@ extern float endstop_adj[3];
#endif
extern float min_pos[3];
extern float max_pos[3];
extern bool axis_known_position[3];
extern int fanSpeed;
#ifdef BARICUDA
extern int ValvePressure;

92
Marlin/Marlin_main.cpp
Unescape Escape View File

@ -43,6 +43,7 @@
#include "ConfigurationStore.h"
#include "language.h"
#include "pins_arduino.h"
#include "math.h"
#ifdef BLINKM
#include "BlinkM.h"
@ -191,6 +192,7 @@ float endstop_adj[3]={0,0,0};
#endif
float min_pos[3] = { X_MIN_POS, Y_MIN_POS, Z_MIN_POS };
float max_pos[3] = { X_MAX_POS, Y_MAX_POS, Z_MAX_POS };
bool axis_known_position[3] = {false, false, false};
// Extruder offset
#if EXTRUDERS > 1
@ -949,16 +951,11 @@ static void homeaxis(int axis) {
current_position[axis] = 0;
plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
// Engage Servo endstop if enabled
#ifdef SERVO_ENDSTOPS
#if defined (ENABLE_AUTO_BED_LEVELING) && (PROBE_SERVO_DEACTIVATION_DELAY > 0)
if (axis==Z_AXIS) {
#if defined (Z_RAISE_BEFORE_HOMING) && (Z_RAISE_BEFORE_HOMING > 0)
destination[axis] = Z_RAISE_BEFORE_HOMING * axis_home_dir * (-1); // Set destination away from bed
feedrate = max_feedrate[axis];
plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate, active_extruder);
st_synchronize();
#endif
engage_z_probe();
}
else
@ -1000,6 +997,7 @@ static void homeaxis(int axis) {
destination[axis] = current_position[axis];
feedrate = 0.0;
endstops_hit_on_purpose();
axis_known_position[axis] = true;
// Retract Servo endstop if enabled
#ifdef SERVO_ENDSTOPS
@ -1208,12 +1206,6 @@ void process_commands()
HOMEAXIS(Y);
}
#if Z_HOME_DIR < 0 // If homing towards BED do Z last
if((home_all_axis) || (code_seen(axis_codes[Z_AXIS]))) {
HOMEAXIS(Z);
}
#endif
if(code_seen(axis_codes[X_AXIS]))
{
if(code_value_long() != 0) {
@ -1226,14 +1218,74 @@ void process_commands()
current_position[Y_AXIS]=code_value()+add_homeing[1];
}
}
#if Z_HOME_DIR < 0 // If homing towards BED do Z last
#ifndef Z_SAFE_HOMING
if((home_all_axis) || (code_seen(axis_codes[Z_AXIS]))) {
#if defined (Z_RAISE_BEFORE_HOMING) && (Z_RAISE_BEFORE_HOMING > 0)
destination[Z_AXIS] = Z_RAISE_BEFORE_HOMING * home_dir(Z_AXIS) * (-1); // Set destination away from bed
feedrate = max_feedrate[Z_AXIS];
plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate, active_extruder);
st_synchronize();
#endif
HOMEAXIS(Z);
}
#else // Z Safe mode activated.
if(home_all_axis) {
destination[X_AXIS] = round(Z_SAFE_HOMING_X_POINT - X_PROBE_OFFSET_FROM_EXTRUDER);
destination[Y_AXIS] = round(Z_SAFE_HOMING_Y_POINT - Y_PROBE_OFFSET_FROM_EXTRUDER);
destination[Z_AXIS] = Z_RAISE_BEFORE_HOMING * home_dir(Z_AXIS) * (-1); // Set destination away from bed
feedrate = XY_TRAVEL_SPEED;
current_position[Z_AXIS] = 0;
plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate, active_extruder);
st_synchronize();
current_position[X_AXIS] = destination[X_AXIS];
current_position[Y_AXIS] = destination[Y_AXIS];
HOMEAXIS(Z);
}
// Let's see if X and Y are homed and probe is inside bed area.
if(code_seen(axis_codes[Z_AXIS])) {
if ( (axis_known_position[X_AXIS]) && (axis_known_position[Y_AXIS]) \
&& (current_position[X_AXIS]+X_PROBE_OFFSET_FROM_EXTRUDER >= X_MIN_POS) \
&& (current_position[X_AXIS]+X_PROBE_OFFSET_FROM_EXTRUDER <= X_MAX_POS) \
&& (current_position[Y_AXIS]+Y_PROBE_OFFSET_FROM_EXTRUDER >= Y_MIN_POS) \
&& (current_position[Y_AXIS]+Y_PROBE_OFFSET_FROM_EXTRUDER <= Y_MAX_POS)) {
current_position[Z_AXIS] = 0;
plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
destination[Z_AXIS] = Z_RAISE_BEFORE_HOMING * home_dir(Z_AXIS) * (-1); // Set destination away from bed
feedrate = max_feedrate[Z_AXIS];
plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate, active_extruder);
st_synchronize();
HOMEAXIS(Z);
} else if (!((axis_known_position[X_AXIS]) && (axis_known_position[Y_AXIS]))) {
LCD_MESSAGEPGM(MSG_POSITION_UNKNOWN);
SERIAL_ECHO_START;
SERIAL_ECHOLNPGM(MSG_POSITION_UNKNOWN);
} else {
LCD_MESSAGEPGM(MSG_ZPROBE_OUT);
SERIAL_ECHO_START;
SERIAL_ECHOLNPGM(MSG_ZPROBE_OUT);
}
}
#endif
#endif
if(code_seen(axis_codes[Z_AXIS])) {
if(code_value_long() != 0) {
current_position[Z_AXIS]=code_value()+add_homeing[2];
}
}
#ifdef ENABLE_AUTO_BED_LEVELING
current_position[Z_AXIS] -= Z_PROBE_OFFSET_FROM_EXTRUDER; //Add Z_Probe offset (the distance is negative)
if((home_all_axis) || (code_seen(axis_codes[Z_AXIS]))) {
current_position[Z_AXIS] -= Z_PROBE_OFFSET_FROM_EXTRUDER; //Add Z_Probe offset (the distance is negative)
}
#endif
plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
#endif // else DELTA
@ -1275,9 +1327,9 @@ void process_commands()
do_blocking_move_to(LEFT_PROBE_BED_POSITION - X_PROBE_OFFSET_FROM_EXTRUDER, BACK_PROBE_BED_POSITION - Y_PROBE_OFFSET_FROM_EXTRUDER, current_position[Z_AXIS]);
engage_z_probe(); // Engage Z Servo endstop if available
run_z_probe();
float z_at_xLeft_yBack = current_position[Z_AXIS];
retract_z_probe();
SERIAL_PROTOCOLPGM("Bed x: ");
SERIAL_PROTOCOL(LEFT_PROBE_BED_POSITION);
@ -1290,9 +1342,12 @@ void process_commands()
// prob 2
do_blocking_move_to(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS] + Z_RAISE_BETWEEN_PROBINGS);
do_blocking_move_to(LEFT_PROBE_BED_POSITION - X_PROBE_OFFSET_FROM_EXTRUDER, FRONT_PROBE_BED_POSITION - Y_PROBE_OFFSET_FROM_EXTRUDER, current_position[Z_AXIS]);
engage_z_probe(); // Engage Z Servo endstop if available
run_z_probe();
float z_at_xLeft_yFront = current_position[Z_AXIS];
retract_z_probe();
SERIAL_PROTOCOLPGM("Bed x: ");
SERIAL_PROTOCOL(LEFT_PROBE_BED_POSITION);
SERIAL_PROTOCOLPGM(" y: ");
@ -1305,9 +1360,12 @@ void process_commands()
do_blocking_move_to(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS] + Z_RAISE_BETWEEN_PROBINGS);
// the current position will be updated by the blocking move so the head will not lower on this next call.
do_blocking_move_to(RIGHT_PROBE_BED_POSITION - X_PROBE_OFFSET_FROM_EXTRUDER, FRONT_PROBE_BED_POSITION - Y_PROBE_OFFSET_FROM_EXTRUDER, current_position[Z_AXIS]);
engage_z_probe(); // Engage Z Servo endstop if available
run_z_probe();
float z_at_xRight_yFront = current_position[Z_AXIS];
retract_z_probe(); // Retract Z Servo endstop if available
SERIAL_PROTOCOLPGM("Bed x: ");
SERIAL_PROTOCOL(RIGHT_PROBE_BED_POSITION);
SERIAL_PROTOCOLPGM(" y: ");
@ -1320,8 +1378,6 @@ void process_commands()
set_bed_level_equation(z_at_xLeft_yFront, z_at_xRight_yFront, z_at_xLeft_yBack);
retract_z_probe(); // Retract Z Servo endstop if available
st_synchronize();
// The following code correct the Z height difference from z-probe position and hotend tip position.

18
Marlin/language.h
Unescape Escape View File

@ -136,6 +136,8 @@
#define MSG_FILAMENTCHANGE "Change filament"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -301,6 +303,8 @@
#define MSG_FILAMENTCHANGE "Change filament"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -465,6 +469,8 @@
#define MSG_FILAMENTCHANGE "Changer filament"
#define MSG_INIT_SDCARD "Init. la carte SD"
#define MSG_CNG_SDCARD "Changer de carte SD"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -632,6 +638,8 @@
#define MSG_FILAMENTCHANGE "Filament wechseln"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -803,6 +811,8 @@
#define MSG_RETRACT_ARROW "Retraer"
#define MSG_PART_RELEASE "Desacople Parcial"
#define MSG_STEPPER_RELEASED "Desacoplada."
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -964,6 +974,8 @@
#define MSG_FILAMENTCHANGE "Change filament"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -1125,6 +1137,8 @@
#define MSG_FILAMENTCHANGE "Cambia filamento"
#define MSG_INIT_SDCARD "Iniz. SD-Card"
#define MSG_CNG_SDCARD "Cambia SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages
@ -1295,6 +1309,8 @@
#define MSG_FILAMENTCHANGE "Change filament"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "Sonda fora da mesa"
#define MSG_POSITION_UNKNOWN "Home X/Y antes de Z"
// Serial Console Messages
@ -1461,6 +1477,8 @@
#define MSG_FILAMENTCHANGE "Change filament"
#define MSG_INIT_SDCARD "Init. SD-Card"
#define MSG_CNG_SDCARD "Change SD-Card"
#define MSG_ZPROBE_OUT "ZProbe Outside Bed"
#define MSG_POSITION_UNKNOWN "Home X/Y before Z"
// Serial Console Messages

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