diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h index 0c8dd5500..80961d4cb 100644 --- a/Marlin/Configuration.h +++ b/Marlin/Configuration.h @@ -470,7 +470,15 @@ const bool Z_ENDSTOPS_INVERTING = true; // set to true to invert the logic of th // leaving it undefined or defining as 0 will disable the servo subsystem // If unsure, leave commented / disabled // -// #define NUM_SERVOS 3 +//#define NUM_SERVOS 3 // Servo index starts with 0 + +// Servo Endstops +// +// This allows for servo actuated endstops, primary usage is for the Z Axis to eliminate calibration or bed height changes. +// Use M206 command to correct for switch height offset to actual nozzle height. Store that setting with M500. +// +//#define SERVO_ENDSTOPS {-1, -1, 0} // Servo index for X, Y, Z. Disable with -1 +//#define SERVO_ENDSTOP_ANGLES {0,0, 0,0, 70,0} // X,Y,Z Axis Extend and Retract angles #include "Configuration_adv.h" #include "thermistortables.h" diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp index 39a838d40..f76334571 100644 --- a/Marlin/Marlin_main.cpp +++ b/Marlin/Marlin_main.cpp @@ -351,6 +351,16 @@ void servo_init() #if (NUM_SERVOS >= 5) #error "TODO: enter initalisation code for more servos" #endif + + // Set position of Servo Endstops that are defined + #ifdef SERVO_ENDSTOPS + for(int8_t i = 0; i < 3; i++) + { + if(servo_endstops[i] > -1) { + servos[servo_endstops[i]].write(servo_endstop_angles[i * 2 + 1]); + } + } + #endif } void setup() @@ -664,11 +674,16 @@ static void axis_is_at_home(int axis) { static void homeaxis(int axis) { #define HOMEAXIS_DO(LETTER) \ ((LETTER##_MIN_PIN > -1 && LETTER##_HOME_DIR==-1) || (LETTER##_MAX_PIN > -1 && LETTER##_HOME_DIR==1)) - if (axis==X_AXIS ? HOMEAXIS_DO(X) : axis==Y_AXIS ? HOMEAXIS_DO(Y) : axis==Z_AXIS ? HOMEAXIS_DO(Z) : 0) { + + // Engage Servo endstop if enabled + #ifdef SERVO_ENDSTOPS[axis] > -1 + servos[servo_endstops[axis]].write(servo_endstop_angles[axis * 2]); + #endif + current_position[axis] = 0; plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]); destination[axis] = 1.5 * max_length(axis) * home_dir(axis); @@ -691,6 +706,11 @@ static void homeaxis(int axis) { destination[axis] = current_position[axis]; feedrate = 0.0; endstops_hit_on_purpose(); + + // Retract Servo endstop if enabled + #ifdef SERVO_ENDSTOPS[axis] > -1 + servos[servo_endstops[axis]].write(servo_endstop_angles[axis * 2 + 1]); + #endif } } #define HOMEAXIS(LETTER) homeaxis(LETTER##_AXIS) @@ -2281,4 +2301,4 @@ bool setTargetedHotend(int code){ } } return false; -} +} \ No newline at end of file