diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h index 2c1b8546df..0ad5639366 100644 --- a/Marlin/Configuration.h +++ b/Marlin/Configuration.h @@ -63,6 +63,43 @@ #define POWER_SUPPLY 1 + +//=========================================================================== +//============================== Delta Settings ============================= +//=========================================================================== +// Enable DELTA kinematics +#define DELTA + +// Make delta curves from many straight lines (linear interpolation). +// This is a trade-off between visible corners (not enough segments) +// and processor overload (too many expensive sqrt calls). +#define DELTA_SEGMENTS_PER_SECOND 200 + +// Center-to-center distance of the holes in the diagonal push rods. +#define DELTA_DIAGONAL_ROD 250.0 // mm + +// Horizontal offset from middle of printer to smooth rod center. +#define DELTA_SMOOTH_ROD_OFFSET 175.0 // mm + +// Horizontal offset of the universal joints on the end effector. +#define DELTA_EFFECTOR_OFFSET 33.0 // mm + +// Horizontal offset of the universal joints on the carriages. +#define DELTA_CARRIAGE_OFFSET 18.0 // mm + +// Effective horizontal distance bridged by diagonal push rods. +#define DELTA_RADIUS (DELTA_SMOOTH_ROD_OFFSET-DELTA_EFFECTOR_OFFSET-DELTA_CARRIAGE_OFFSET) + +// Effective X/Y positions of the three vertical towers. +#define SIN_60 0.8660254037844386 +#define COS_60 0.5 +#define DELTA_TOWER1_X -SIN_60*DELTA_RADIUS // front left tower +#define DELTA_TOWER1_Y -COS_60*DELTA_RADIUS +#define DELTA_TOWER2_X SIN_60*DELTA_RADIUS // front right tower +#define DELTA_TOWER2_Y -COS_60*DELTA_RADIUS +#define DELTA_TOWER3_X 0.0 // back middle tower +#define DELTA_TOWER3_Y DELTA_RADIUS + //=========================================================================== //=============================Thermal Settings ============================ //=========================================================================== @@ -128,8 +165,8 @@ // PID settings: // Comment the following line to disable PID and enable bang-bang. #define PIDTEMP -#define BANG_MAX 256 // limits current to nozzle while in bang-bang mode; 256=full current -#define PID_MAX 256 // limits current to nozzle while PID is active (see PID_FUNCTIONAL_RANGE below); 256=full current +#define BANG_MAX 255 // limits current to nozzle while in bang-bang mode; 255=full current +#define PID_MAX 255 // limits current to nozzle while PID is active (see PID_FUNCTIONAL_RANGE below); 255=full current #ifdef PIDTEMP //#define PID_DEBUG // Sends debug data to the serial port. //#define PID_OPENLOOP 1 // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX @@ -172,9 +209,9 @@ // This sets the max power delived to the bed, and replaces the HEATER_BED_DUTY_CYCLE_DIVIDER option. // all forms of bed control obey this (PID, bang-bang, bang-bang with hysteresis) -// setting this to anything other than 256 enables a form of PWM to the bed just like HEATER_BED_DUTY_CYCLE_DIVIDER did, +// setting this to anything other than 255 enables a form of PWM to the bed just like HEATER_BED_DUTY_CYCLE_DIVIDER did, // so you shouldn't use it unless you are OK with PWM on your bed. (see the comment on enabling PIDTEMPBED) -#define MAX_BED_POWER 256 // limits duty cycle to bed; 256=full current +#define MAX_BED_POWER 255 // limits duty cycle to bed; 255=full current #ifdef PIDTEMPBED //120v 250W silicone heater into 4mm borosilicate (MendelMax 1.5+) @@ -282,9 +319,11 @@ const bool Z_ENDSTOPS_INVERTING = true; // set to true to invert the logic of th //#define BED_CENTER_AT_0_0 // If defined, the center of the bed is at (X=0, Y=0) //Manual homing switch locations: +// For deltabots this means top and center of the cartesian print volume. #define MANUAL_X_HOME_POS 0 #define MANUAL_Y_HOME_POS 0 #define MANUAL_Z_HOME_POS 0 +//#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing. //// MOVEMENT SETTINGS #define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h index 2e87d7b2ea..2906b463be 100644 --- a/Marlin/Marlin.h +++ b/Marlin/Marlin.h @@ -157,6 +157,9 @@ void FlushSerialRequestResend(); void ClearToSend(); void get_coordinates(); +#ifdef DELTA +void calculate_delta(float cartesian[3]); +#endif void prepare_move(); void kill(); void Stop(); diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp index f2bcb9a385..b7ccf26938 100644 --- a/Marlin/Marlin_main.cpp +++ b/Marlin/Marlin_main.cpp @@ -198,6 +198,9 @@ int EtoPPressure=0; //=========================================================================== const char axis_codes[NUM_AXIS] = {'X', 'Y', 'Z', 'E'}; static float destination[NUM_AXIS] = { 0.0, 0.0, 0.0, 0.0}; +#ifdef DELTA +static float delta[3] = {0.0, 0.0, 0.0}; +#endif static float offset[3] = {0.0, 0.0, 0.0}; static bool home_all_axis = true; static float feedrate = 1500.0, next_feedrate, saved_feedrate; @@ -836,6 +839,10 @@ void process_commands() feedrate = 0.0; st_synchronize(); endstops_hit_on_purpose(); + + current_position[X_AXIS] = destination[X_AXIS]; + current_position[Y_AXIS] = destination[Y_AXIS]; + current_position[Z_AXIS] = destination[Z_AXIS]; } #endif @@ -847,14 +854,14 @@ void process_commands() if((home_all_axis) || (code_seen(axis_codes[Y_AXIS]))) { 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_seen(axis_codes[X_AXIS])) { if(code_value_long() != 0) { current_position[X_AXIS]=code_value()+add_homeing[0]; @@ -872,8 +879,12 @@ void process_commands() current_position[Z_AXIS]=code_value()+add_homeing[2]; } } - plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]); - + #ifdef DELTA + calculate_delta(current_position); + plan_set_position(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], current_position[E_AXIS]); + #else + plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]); + #endif #ifdef ENDSTOPS_ONLY_FOR_HOMING enable_endstops(false); #endif @@ -2051,11 +2062,64 @@ void clamp_to_software_endstops(float target[3]) } } +#ifdef DELTA +void calculate_delta(float cartesian[3]) +{ + delta[X_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD) + - sq(DELTA_TOWER1_X-cartesian[X_AXIS]) + - sq(DELTA_TOWER1_Y-cartesian[Y_AXIS]) + ) + cartesian[Z_AXIS]; + delta[Y_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD) + - sq(DELTA_TOWER2_X-cartesian[X_AXIS]) + - sq(DELTA_TOWER2_Y-cartesian[Y_AXIS]) + ) + cartesian[Z_AXIS]; + delta[Z_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD) + - sq(DELTA_TOWER3_X-cartesian[X_AXIS]) + - sq(DELTA_TOWER3_Y-cartesian[Y_AXIS]) + ) + cartesian[Z_AXIS]; + /* + SERIAL_ECHOPGM("cartesian x="); SERIAL_ECHO(cartesian[X_AXIS]); + SERIAL_ECHOPGM(" y="); SERIAL_ECHO(cartesian[Y_AXIS]); + SERIAL_ECHOPGM(" z="); SERIAL_ECHOLN(cartesian[Z_AXIS]); + + SERIAL_ECHOPGM("delta x="); SERIAL_ECHO(delta[X_AXIS]); + SERIAL_ECHOPGM(" y="); SERIAL_ECHO(delta[Y_AXIS]); + SERIAL_ECHOPGM(" z="); SERIAL_ECHOLN(delta[Z_AXIS]); + */ +} +#endif + void prepare_move() { clamp_to_software_endstops(destination); previous_millis_cmd = millis(); +#ifdef DELTA + float difference[NUM_AXIS]; + for (int8_t i=0; i < NUM_AXIS; i++) { + difference[i] = destination[i] - current_position[i]; + } + float cartesian_mm = sqrt(sq(difference[X_AXIS]) + + sq(difference[Y_AXIS]) + + sq(difference[Z_AXIS])); + if (cartesian_mm < 0.000001) { cartesian_mm = abs(difference[E_AXIS]); } + if (cartesian_mm < 0.000001) { return; } + float seconds = 6000 * cartesian_mm / feedrate / feedmultiply; + int steps = max(1, int(DELTA_SEGMENTS_PER_SECOND * seconds)); + // SERIAL_ECHOPGM("mm="); SERIAL_ECHO(cartesian_mm); + // SERIAL_ECHOPGM(" seconds="); SERIAL_ECHO(seconds); + // SERIAL_ECHOPGM(" steps="); SERIAL_ECHOLN(steps); + for (int s = 1; s <= steps; s++) { + float fraction = float(s) / float(steps); + for(int8_t i=0; i < NUM_AXIS; i++) { + destination[i] = current_position[i] + difference[i] * fraction; + } + calculate_delta(destination); + plan_buffer_line(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], + destination[E_AXIS], feedrate*feedmultiply/60/100.0, + active_extruder); + } +#else // Do not use feedmultiply for E or Z only moves if( (current_position[X_AXIS] == destination [X_AXIS]) && (current_position[Y_AXIS] == destination [Y_AXIS])) { plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate/60, active_extruder); @@ -2063,6 +2127,7 @@ void prepare_move() else { plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], feedrate*feedmultiply/60/100.0, active_extruder); } +#endif for(int8_t i=0; i < NUM_AXIS; i++) { current_position[i] = destination[i]; } @@ -2305,4 +2370,5 @@ bool setTargetedHotend(int code){ } } return false; -} \ No newline at end of file +} +