//--------------------------------------------------
// Simple Hotend Tempcontrol with ON/OFF switching
//--------------------------------------------------
void heater_on_off_control(heater_struct *hotend)
{
hotend->akt_temp = analog2temp(adc_read(hotend->ad_cannel));
if(hotend->akt_temp < 4)
{
hotend->target_temp = 0;
heater_switch(hotend->io_adr, 0);
}
if(hotend->akt_temp > (hotend->target_temp+1))
{
heater_switch(hotend->io_adr, 0);
hotend->pwm = 0;
}
else if((hotend->akt_temp < (hotend->target_temp-1)) && (hotend->target_temp > 0))
{
heater_switch(hotend->io_adr, 1);
hotend->pwm = 255;
}
}
void PID_autotune(float temp)
{
float input;
int cycles=0;
bool heating = true;
unsigned long temp_millis = millis();
unsigned long t1=temp_millis;
unsigned long t2=temp_millis;
long t_high;
long t_low;
long bias=127;
long d = 127;
float Ku, Tu;
float Kp, Ki, Kd;
float max, min;
SERIAL_ECHOLN("PID Autotune start");
disable_heater(); // switch off all heaters.
soft_pwm[0] = 255>>1;
for(;;) {
if(temp_meas_ready == true) { // temp sample ready
CRITICAL_SECTION_START;
temp_meas_ready = false;
CRITICAL_SECTION_END;
input = analog2temp(current_raw[0], 0);
max=max(max,input);
min=min(min,input);
if(heating == true && input > temp) {
if(millis() - t2 > 5000) {
heating=false;
soft_pwm[0] = (bias - d) >> 1;
t1=millis();
t_high=t1 - t2;
max=temp;
}
}
if(heating == false && input < temp) {
if(millis() - t1 > 5000) {
heating=true;
t2=millis();
t_low=t2 - t1;
if(cycles > 0) {
bias += (d*(t_high - t_low))/(t_low + t_high);
bias = constrain(bias, 20 ,235);
if(bias > 127) d = 254 - bias;
else d = bias;
SERIAL_PROTOCOLPGM(" bias: "); SERIAL_PROTOCOL(bias);
SERIAL_PROTOCOLPGM(" d: "); SERIAL_PROTOCOL(d);
SERIAL_PROTOCOLPGM(" min: "); SERIAL_PROTOCOL(min);
SERIAL_PROTOCOLPGM(" max: "); SERIAL_PROTOCOLLN(max);
if(cycles > 2) {
Ku = (4.0*d)/(3.14159*(max-min)/2.0);
Tu = ((float)(t_low + t_high)/1000.0);
SERIAL_PROTOCOLPGM(" Ku: "); SERIAL_PROTOCOL(Ku);
SERIAL_PROTOCOLPGM(" Tu: "); SERIAL_PROTOCOLLN(Tu);
Kp = 0.6*Ku;
Ki = 2*Kp/Tu;
Kd = Kp*Tu/8;
SERIAL_PROTOCOLLNPGM(" Clasic PID ")
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(Kd);
/*
Kp = 0.33*Ku;
Ki = Kp/Tu;
Kd = Kp*Tu/3;
SERIAL_PROTOCOLLNPGM(" Some overshoot ")
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(Kd);
Kp = 0.2*Ku;
Ki = 2*Kp/Tu;
Kd = Kp*Tu/3;
SERIAL_PROTOCOLLNPGM(" No overshoot ")
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(Kd);
*/
}
}
soft_pwm[0] = (bias + d) >> 1;
cycles++;
min=temp;
}
}
void PID_autotune(float temp, int extruder, int ncycles)
{
float input = 0.0;
int cycles=0;
bool heating = true;
unsigned long temp_millis = millis();
unsigned long t1=temp_millis;
unsigned long t2=temp_millis;
long t_high = 0;
long t_low = 0;
long bias, d;
float Ku, Tu;
float Kp, Ki, Kd;
float max = 0, min = 10000;
if ((extruder > EXTRUDERS)
#if (TEMP_BED_PIN <= -1)
||(extruder < 0)
#endif
){
SERIAL_ECHOLN("PID Autotune failed. Bad extruder number.");
return;
}
SERIAL_ECHOLN("PID Autotune start");
disable_heater(); // switch off all heaters.
if (extruder<0)
{
soft_pwm_bed = (MAX_BED_POWER)/2;
bias = d = (MAX_BED_POWER)/2;
}
else
{
soft_pwm[extruder] = (PID_MAX)/2;
bias = d = (PID_MAX)/2;
}
for(;;) {
if(temp_meas_ready == true) { // temp sample ready
CRITICAL_SECTION_START;
temp_meas_ready = false;
CRITICAL_SECTION_END;
input = (extruder<0)?analog2tempBed(current_raw_bed):analog2temp(current_raw[extruder], extruder);
max=max(max,input);
min=min(min,input);
if(heating == true && input > temp) {
if(millis() - t2 > 5000) {
heating=false;
if (extruder<0)
soft_pwm_bed = (bias - d) >> 1;
else
soft_pwm[extruder] = (bias - d) >> 1;
t1=millis();
t_high=t1 - t2;
max=temp;
}
}
//--------------------------------------------------
// Tempcontrol with PID for Hotend
//--------------------------------------------------
void heater_PID_control(heater_struct *hotend)
{
signed short error;
signed short delta_temp;
signed short heater_duty;
hotend->akt_temp = analog2temp(adc_read(hotend->ad_cannel));
//MIN save to display the jitter of Heaterbarrel
#ifdef MINTEMP
if(hotend->akt_temp < 4)
{
hotend->target_temp = 0;
heater_switch(hotend->io_adr, 0);
}
#endif
//MAX save to display the jitter of Heaterbarrel
#ifdef MAXTEMP
if(hotend->akt_temp > 300)
{
hotend->target_temp = 0;
heater_switch(hotend->io_adr, 0);
}
#endif
error = hotend->target_temp - hotend->akt_temp;
//printf("ERR: %d ", error);
delta_temp = hotend->akt_temp - hotend->prev_temp;
hotend->prev_temp = hotend->akt_temp;
hotend->pTerm = (signed short)(((long)hotend->PID_Kp * error) / 256);
const signed short H0 = min(HEATER_DUTY_FOR_SETPOINT(hotend->target_temp),HEATER_CURRENT);
heater_duty = H0 + hotend->pTerm;
if(abs(error) < 30)
{
hotend->temp_iState += error;
//printf("I1: %d ", hotend->temp_iState);
hotend->temp_iState = constrain(hotend->temp_iState, hotend->temp_iState_min, hotend->temp_iState_max);
//printf("I2: %d ", hotend->temp_iState);
hotend->iTerm = (signed short)(((long)hotend->PID_I * hotend->temp_iState) / 256);
heater_duty += hotend->iTerm;
}
//printf("I: %d ", hotend->iTerm);
signed short prev_error = abs(hotend->target_temp - hotend->prev_temp);
signed short log3 = 1; // discrete logarithm base 3, plus 1
if(prev_error > 81){ prev_error /= 81; log3 += 4; }
if(prev_error > 9){ prev_error /= 9; log3 += 2; }
if(prev_error > 3){ prev_error /= 3; log3 ++; }
hotend->dTerm = (signed short)(((long)hotend->PID_Kd * delta_temp) / (256*log3));
//printf("D: %d ", hotend->dTerm);
heater_duty += hotend->dTerm;
//printf("PWM: %d \n", heater_duty);
heater_duty = constrain(heater_duty, 0, HEATER_CURRENT);
if(hotend->target_temp == 0)
hotend->pwm = 0;
else
hotend->pwm = (unsigned char)heater_duty;
}
void process_commands() {
unsigned long codenum; //throw away variable
if (code_seen('N')) {
gcode_N = code_value_long();
if (gcode_N != gcode_LastN+1 && (strstr(cmdbuffer, "M110") == NULL) ) {
gcode_LastN=0;
pc.printf("ok");
//if(gcode_N != gcode_LastN+1 && !code_seen("M110") ) { //Hmm, compile size is different between using this vs the line above even though it should be the same thing. Keeping old method.
//pc.printf("Serial Error: Line Number is not Last Line Number+1, Last Line:");
//pc.printf("%d\n",gcode_LastN);
//FlushSerialRequestResend();
return;
}
if (code_seen('*')) {
int checksum = 0;
int count=0;
while (cmdbuffer[count] != '*') checksum = checksum^cmdbuffer[count++];
if ( (int)code_value() != checksum) {
//pc.printf("Error: checksum mismatch, Last Line:");
//pc.printf("%d\n",gcode_LastN);
//FlushSerialRequestResend();
return;
}
//if no errors, continue parsing
} else {
//pc.printf("Error: No Checksum with line number, Last Line:");
//pc.printf("%d\n",gcode_LastN);
//FlushSerialRequestResend();
return;
}
gcode_LastN = gcode_N;
//if no errors, continue parsing
} else { // if we don't receive 'N' but still see '*'
if (code_seen('*')) {
//pc.printf("Error: No Line Number with checksum, Last Line:");
//pc.printf("%d\n",gcode_LastN);
return;
}
}
//continues parsing only if we don't receive any 'N' or '*' or no errors if we do. :)
if (code_seen('G')) {
switch ((int)code_value()) {
case 0: // G0 -> G1
case 1: // G1
reset_timers();//avoid timer overflow after 30 seconds
get_coordinates(); // For X Y Z E F
x_steps_to_take = abs(destination_x - current_x)*x_steps_per_unit;
y_steps_to_take = abs(destination_y - current_y)*y_steps_per_unit;
z_steps_to_take = abs(destination_z - current_z)*z_steps_per_unit;
e_steps_to_take = abs(destination_e - current_e)*e_steps_per_unit;
//printf(" x_steps_to_take:%d\n", x_steps_to_take);
time_for_move = max(X_TIME_FOR_MOVE,Y_TIME_FOR_MOVE);
time_for_move = max(time_for_move,Z_TIME_FOR_MOVE);
time_for_move = max(time_for_move,E_TIME_FOR_MOVE);
if (x_steps_to_take) x_interval = time_for_move/x_steps_to_take;
if (y_steps_to_take) y_interval = time_for_move/y_steps_to_take;
if (z_steps_to_take) z_interval = time_for_move/z_steps_to_take;
if (e_steps_to_take) e_interval = time_for_move/e_steps_to_take;
x_steps_remaining = x_steps_to_take;
y_steps_remaining = y_steps_to_take;
z_steps_remaining = z_steps_to_take;
e_steps_remaining = e_steps_to_take;
if (DEBUGGING) {
pc.printf("destination_x: %f\n",destination_x);
pc.printf("current_x: %f\n",current_x);
pc.printf("x_steps_to_take: %d\n",x_steps_to_take);
pc.printf("X_TIME_FOR_MOVE: %f\n",X_TIME_FOR_MOVE);
pc.printf("x_interval: %f\n\n",x_interval);
pc.printf("destination_y: %f\n",destination_y);
pc.printf("current_y: %f\n",current_y);
pc.printf("y_steps_to_take: %d\n",y_steps_to_take);
pc.printf("Y_TIME_FOR_MOVE: %f\n",Y_TIME_FOR_MOVE);
pc.printf("y_interval: %f\n\n",y_interval);
pc.printf("destination_z: %f\n",destination_z);
pc.printf("current_z: %f\n",current_z);
pc.printf("z_steps_to_take: %d\n",z_steps_to_take);
pc.printf("Z_TIME_FOR_MOVE: %f\n",Z_TIME_FOR_MOVE);
pc.printf("z_interval: %f\n\n",z_interval);
pc.printf("destination_e: %f\n",destination_e);
pc.printf("current_e: %f\n",current_e);
pc.printf("e_steps_to_take: %d\n",e_steps_to_take);
pc.printf("E_TIME_FOR_MOVE: %f\n",E_TIME_FOR_MOVE);
pc.printf("e_interval: %f\n\n",e_interval);
}
linear_move(); // make the move
ClearToSend();
return;
case 4: // G4 dwell
codenum = 0;
if (code_seen('P')) codenum = code_value(); // milliseconds to wait
if (code_seen('S')) codenum = code_value()*1000; // seconds to wait
previous_millis_heater = millis(); // keep track of when we started waiting
while ((millis() - previous_millis_heater) < codenum ) manage_heater(); //manage heater until time is up
break;
case 90: // G90
relative_mode = false;
break;
case 91: // G91
relative_mode = true;
break;
case 92: // G92
if (code_seen('X')) current_x = code_value();
if (code_seen('Y')) current_y = code_value();
if (code_seen('Z')) current_z = code_value();
if (code_seen('E')) current_e = code_value();
break;
case 93: // G93
pc.printf("previous_micros:%d\n", previous_micros);
pc.printf("previous_micros_x:%d\n", previous_micros_x);
pc.printf("previous_micros_y:%d\n", previous_micros_y);
pc.printf("previous_micros_z:%d\n", previous_micros_z);
break;
}
}
if (code_seen('M')) {
switch ( (int)code_value() ) {
case 104: // M104 - set hot-end temp
if (code_seen('S'))
{
target_raw = temp2analog(code_value());
//pc.printf("target_raw: %d\n ", target_raw);
}
break;
case 140: // M140 - set heated-printbed temp
if (code_seen('S'))
{
target_raw1 = temp2analog(code_value());
//pc.printf("target_raw1: %d\n ", target_raw);
}
break;
case 105: // M105
pc.printf("ok T:");
if (TEMP_0_PIN != NC) {
pc.printf("%f\n", analog2temp( (p_temp0.read_u16()) ));
} else {
pc.printf("0.0\n");
}
if (!code_seen('N')) return; // If M105 is sent from generated gcode, then it needs a response.
break;
case 109: // M109 - Wait for heater to reach target.
if (code_seen('S')) target_raw = temp2analog(code_value());
previous_millis_heater = millis();
while (current_raw < target_raw) {
if ( (millis()-previous_millis_heater) > 1000 ) { //Print Temp Reading every 1 second while heating up.
pc.printf("ok T:");
if (TEMP_0_PIN != NC) {
pc.printf("%f\n", analog2temp(p_temp0.read_u16()));
} else {
pc.printf("0.0\n");
}
previous_millis_heater = millis();
}
manage_heater();
}
break;
case 106: //M106 Fan On
p_fan = 1;
break;
case 107: //M107 Fan Off
p_fan = 0;
break;
case 80: // M81 - ATX Power On
//if(PS_ON_PIN > -1) pinMode(PS_ON_PIN,OUTPUT); //GND
break;
case 81: // M81 - ATX Power Off
//if(PS_ON_PIN > -1) pinMode(PS_ON_PIN,INPUT); //Floating
break;
case 82:
relative_mode_e = false;
break;
case 83:
relative_mode_e = true;
break;
case 84:
disable_x();
disable_y();
disable_z();
disable_e();
break;
case 85: // M85
code_seen('S');
max_inactive_time = code_value()*1000;
break;
case 86: // M86 If Endstop is Not Activated then Abort Print
if (code_seen('X')) {
if (X_MIN_PIN != NC) {
if ( p_X_min == ENDSTOPS_INVERTING ) {
kill(3);
}
}
}
if (code_seen('Y')) {
if (Y_MIN_PIN != NC) {
if ( p_Y_min == ENDSTOPS_INVERTING ) {
kill(4);
}
}
}
break;
case 92: // M92
if (code_seen('X')) x_steps_per_unit = code_value();
if (code_seen('Y')) y_steps_per_unit = code_value();
if (code_seen('Z')) z_steps_per_unit = code_value();
if (code_seen('E')) e_steps_per_unit = code_value();
break;
}
}
ClearToSend();
}
void manage_heater()
{
#ifdef USE_WATCHDOG
wd_reset();
#endif
float pid_input;
float pid_output;
if(temp_meas_ready != true) //better readability
return;
CRITICAL_SECTION_START;
temp_meas_ready = false;
CRITICAL_SECTION_END;
for(int e = 0; e < EXTRUDERS; e++)
{
#ifdef PIDTEMP
pid_input = analog2temp(current_raw[e], e);
#ifndef PID_OPENLOOP
pid_error[e] = pid_setpoint[e] - pid_input;
if(pid_error[e] > 10) {
pid_output = PID_MAX;
pid_reset[e] = true;
}
else if(pid_error[e] < -10) {
pid_output = 0;
pid_reset[e] = true;
}
else {
if(pid_reset[e] == true) {
temp_iState[e] = 0.0;
pid_reset[e] = false;
}
pTerm[e] = Kp * pid_error[e];
temp_iState[e] += pid_error[e];
temp_iState[e] = constrain(temp_iState[e], temp_iState_min[e], temp_iState_max[e]);
iTerm[e] = Ki * temp_iState[e];
//K1 defined in Configuration.h in the PID settings
#define K2 (1.0-K1)
dTerm[e] = (Kd * (pid_input - temp_dState[e]))*K2 + (K1 * dTerm[e]);
temp_dState[e] = pid_input;
pid_output = constrain(pTerm[e] + iTerm[e] - dTerm[e], 0, PID_MAX);
}
#endif //PID_OPENLOOP
#ifdef PID_DEBUG
SERIAL_ECHOLN(" PIDDEBUG "<<e<<": Input "<<pid_input<<" Output "<<pid_output" pTerm "<<pTerm[e]<<" iTerm "<<iTerm[e]<<" dTerm "<<dTerm[e]);
#endif //PID_DEBUG
#else /* PID off */
pid_output = 0;
if(current_raw[e] < target_raw[e]) {
pid_output = PID_MAX;
}
#endif
// Check if temperature is within the correct range
if((current_raw[e] > minttemp[e]) && (current_raw[e] < maxttemp[e]))
{
//analogWrite(heater_pin_map[e], pid_output);
soft_pwm[e] = (int)pid_output >> 1;
}
else {
// Add a new linear movement to the buffer. steps_x, _y and _z is the absolute position in
// mm. Microseconds specify how many microseconds the move should take to perform. To aid acceleration
// calculation the caller must also provide the physical length of the line in millimeters.
void plan_buffer_line(float x, float y, float z, float e, float feed_rate) {
int current_temp;
// Calculate the buffer head after we push this byte
int next_buffer_head = next_block_index(block_buffer_head);
// If the buffer is full: good! That means we are well ahead of the robot.
// Rest here until there is room in the buffer.
while(block_buffer_tail == next_buffer_head) {
manage_inactivity(1);
#if (MINIMUM_FAN_START_SPEED > 0)
manage_fan_start_speed();
#endif
}
// The target position of the tool in absolute steps
// Calculate target position in absolute steps
//this should be done after the wait, because otherwise a M92 code within the gcode disrupts this calculation somehow
long target[4];
target[X_AXIS] = lround(x*axis_steps_per_unit[X_AXIS]);
target[Y_AXIS] = lround(y*axis_steps_per_unit[Y_AXIS]);
target[Z_AXIS] = lround(z*axis_steps_per_unit[Z_AXIS]);
target[E_AXIS] = lround(e*axis_steps_per_unit[E_AXIS]);
current_temp = analog2temp( current_raw );
#if PREVENT_DANGEROUS_EXTRUDE > 0
if(target[E_AXIS]!=position[E_AXIS]) {
if(current_temp < EXTRUDE_MINTEMP && prevent_cold_extrude) {
position[E_AXIS]=target[E_AXIS]; //behave as if the move really took place, but ignore E part
serial_send(TXT_COLD_EXTRUSION_PREVENTED_CRLF);
}
#if PREVENT_LENGTHY_EXTRUDE > 0
if(labs(target[E_AXIS]-position[E_AXIS]) > axis_steps_per_unit[E_AXIS] * EXTRUDE_MAXLENGTH) {
position[E_AXIS]=target[E_AXIS]; //behave as if the move really took place, but ignore E part
serial_send(TXT_LONG_EXTRUSION_PREVENTED_CRLF);
}
#endif
}
#endif
// Prepare to set up new block
block_t *block = &block_buffer[block_buffer_head];
// Mark block as not busy (Not executed by the stepper interrupt)
block->busy = 0;
// Number of steps for each axis
block->steps_x = labs(target[X_AXIS]-position[X_AXIS]);
block->steps_y = labs(target[Y_AXIS]-position[Y_AXIS]);
block->steps_z = labs(target[Z_AXIS]-position[Z_AXIS]);
block->steps_e = labs(target[E_AXIS]-position[E_AXIS]);
block->steps_e = (long)(block->steps_e * extrudemultiply / 100.0);
block->step_event_count = MAX(block->steps_x, MAX(block->steps_y, MAX(block->steps_z, block->steps_e)));
// Bail if this is a zero-length block
if (block->step_event_count <= DROP_SEGMENTS) return;
// Compute direction bits for this block
block->direction_bits = 0;
if (target[X_AXIS] < position[X_AXIS]) block->direction_bits |= (1<<X_AXIS);
if (target[Y_AXIS] < position[Y_AXIS]) block->direction_bits |= (1<<Y_AXIS);
if (target[Z_AXIS] < position[Z_AXIS]) block->direction_bits |= (1<<Z_AXIS);
if (target[E_AXIS] < position[E_AXIS]) {
block->direction_bits |= (1<<E_AXIS);
//High Feedrate for retract
max_E_feedrate_calc = MAX_RETRACT_FEEDRATE;
retract_feedrate_aktiv = 1;
}
else {
if(retract_feedrate_aktiv) {
if(block->steps_e > 0) retract_feedrate_aktiv = 0;
}
else max_E_feedrate_calc = max_feedrate[E_AXIS];
}
#ifdef DELAY_ENABLE
if(block->steps_x != 0) {
enable_x();
delayMicroseconds(DELAY_ENABLE);
}
if(block->steps_y != 0) {
enable_y();
delayMicroseconds(DELAY_ENABLE);
}
if(block->steps_z != 0) {
enable_z();
delayMicroseconds(DELAY_ENABLE);
}
if(block->steps_e != 0) {
enable_e();
delayMicroseconds(DELAY_ENABLE);
}
#else
//enable active axes
if(block->steps_x != 0) enable_x();
if(block->steps_y != 0) enable_y();
if(block->steps_z != 0) enable_z();
if(block->steps_e != 0) enable_e();
#endif
if (block->steps_e == 0) {
if(feed_rate<mintravelfeedrate) feed_rate=mintravelfeedrate;
}
else {
if(feed_rate<minimumfeedrate) feed_rate=minimumfeedrate;
}
// slow down when the buffer starts to empty, rather than wait at the corner for a buffer refill
int moves_queued=(block_buffer_head-block_buffer_tail + block_buffer_size) & block_buffer_mask;
#ifdef SLOWDOWN
if(moves_queued < (block_buffer_size * 0.5) && moves_queued > MIN_MOVES_QUEUED_FOR_SLOWDOWN)
feed_rate = feed_rate*moves_queued / (float)(block_buffer_size * 0.5);
#endif
float delta_mm[4];
delta_mm[X_AXIS] = (target[X_AXIS]-position[X_AXIS])/(float)(axis_steps_per_unit[X_AXIS]);
delta_mm[Y_AXIS] = (target[Y_AXIS]-position[Y_AXIS])/(float)(axis_steps_per_unit[Y_AXIS]);
delta_mm[Z_AXIS] = (target[Z_AXIS]-position[Z_AXIS])/(float)(axis_steps_per_unit[Z_AXIS]);
//delta_mm[E_AXIS] = (target[E_AXIS]-position[E_AXIS])/axis_steps_per_unit[E_AXIS];
delta_mm[E_AXIS] = ((target[E_AXIS]-position[E_AXIS])/(float)(axis_steps_per_unit[E_AXIS]))*extrudemultiply/100.0;
if ( block->steps_x <= DROP_SEGMENTS && block->steps_y <= DROP_SEGMENTS && block->steps_z <= DROP_SEGMENTS )
block->millimeters = fabs(delta_mm[E_AXIS]);
else
block->millimeters = sqrt(square(delta_mm[X_AXIS]) + square(delta_mm[Y_AXIS]) + square(delta_mm[Z_AXIS]));
float inverse_millimeters = 1.0/(float)(block->millimeters); // Inverse millimeters to remove multiple divides
// Calculate speed in mm/second for each axis. No divide by zero due to previous checks.
float inverse_second = feed_rate * inverse_millimeters;
block->nominal_speed = block->millimeters * inverse_second; // (mm/sec) Always > 0
block->nominal_rate = ceil(block->step_event_count * inverse_second); // (step/sec) Always > 0
/*
#ifdef SLOWDOWN
// segment time im micro seconds
long segment_time = lround(1000000.0/inverse_second);
if ((moves_queued>0) && (moves_queued < (BLOCK_BUFFER_SIZE - 4))) {
if (segment_time<minsegmenttime) { // buffer is draining, add extra time. The amount of time added increases if the buffer is still emptied more.
segment_time=segment_time+lround(2*(minsegmenttime-segment_time)/moves_queued);
}
}
else {
if (segment_time<minsegmenttime) segment_time=minsegmenttime;
}
#endif
// END OF SLOW DOWN SECTION
*/
// Calculate and limit speed in mm/sec for each axis
float current_speed[4];
float speed_factor = 1.0; //factor <=1 do decrease speed
for(int i=0; i < 3; i++) {
current_speed[i] = delta_mm[i] * inverse_second;
if(fabs(current_speed[i]) > max_feedrate[i])
speed_factor = fmin(speed_factor, max_feedrate[i] / fabs(current_speed[i]));
}
current_speed[E_AXIS] = delta_mm[E_AXIS] * inverse_second;
if(fabs(current_speed[E_AXIS]) > max_E_feedrate_calc)
speed_factor = fmin(speed_factor, max_E_feedrate_calc / fabs(current_speed[E_AXIS]));
// Correct the speed
if( speed_factor < 1.0) {
for(unsigned char i=0; i < 4; i++) current_speed[i] *= speed_factor;
block->nominal_speed *= speed_factor;
block->nominal_rate *= speed_factor;
}
// Compute and limit the acceleration rate for the trapezoid generator.
float steps_per_mm = block->step_event_count/(float)(block->millimeters);
if(block->steps_x == 0 && block->steps_y == 0 && block->steps_z == 0)
block->acceleration_st = ceil(retract_acceleration * steps_per_mm); // convert to: acceleration steps/sec^2
else {
block->acceleration_st = ceil(move_acceleration * steps_per_mm); // convert to: acceleration steps/sec^2
// Limit acceleration per axis
if(((float)block->acceleration_st * (float)block->steps_x / (float)block->step_event_count) > axis_steps_per_sqr_second[X_AXIS])
block->acceleration_st = axis_steps_per_sqr_second[X_AXIS];
if(((float)block->acceleration_st * (float)block->steps_y / (float)block->step_event_count) > axis_steps_per_sqr_second[Y_AXIS])
block->acceleration_st = axis_steps_per_sqr_second[Y_AXIS];
if(((float)block->acceleration_st * (float)block->steps_e / (float)block->step_event_count) > axis_steps_per_sqr_second[E_AXIS])
block->acceleration_st = axis_steps_per_sqr_second[E_AXIS];
if(((float)block->acceleration_st * (float)block->steps_z / (float)block->step_event_count ) > axis_steps_per_sqr_second[Z_AXIS])
block->acceleration_st = axis_steps_per_sqr_second[Z_AXIS];
}
block->acceleration = block->acceleration_st / (float)(steps_per_mm);
block->acceleration_rate = (long)((float)block->acceleration_st * 8.388608);
#if 0 // Use old jerk for now
// Compute path unit vector
double unit_vec[3];
unit_vec[X_AXIS] = delta_mm[X_AXIS]*inverse_millimeters;
unit_vec[Y_AXIS] = delta_mm[Y_AXIS]*inverse_millimeters;
unit_vec[Z_AXIS] = delta_mm[Z_AXIS]*inverse_millimeters;
// Compute maximum allowable entry speed at junction by centripetal acceleration approximation.
// Let a circle be tangent to both previous and current path line segments, where the junction
// deviation is defined as the distance from the junction to the closest edge of the circle,
// colinear with the circle center. The circular segment joining the two paths represents the
// path of centripetal acceleration. Solve for max velocity based on max acceleration about the
// radius of the circle, defined indirectly by junction deviation. This may be also viewed as
// path width or max_jerk in the previous grbl version. This approach does not actually deviate
// from path, but used as a robust way to compute cornering speeds, as it takes into account the
// nonlinearities of both the junction angle and junction velocity.
double vmax_junction = MINIMUM_PLANNER_SPEED; // Set default max junction speed
// Skip first block or when previous_nominal_speed is used as a flag for homing and offset cycles.
if ((block_buffer_head != block_buffer_tail) && (previous_nominal_speed > 0.0)) {
// Compute cosine of angle between previous and current path. (prev_unit_vec is negative)
// NOTE: Max junction velocity is computed without sin() or acos() by trig half angle identity.
double cos_theta = - previous_unit_vec[X_AXIS] * unit_vec[X_AXIS]
- previous_unit_vec[Y_AXIS] * unit_vec[Y_AXIS]
- previous_unit_vec[Z_AXIS] * unit_vec[Z_AXIS] ;
// Skip and use default max junction speed for 0 degree acute junction.
if (cos_theta < 0.95) {
vmax_junction = min(previous_nominal_speed,block->nominal_speed);
// Skip and avoid divide by zero for straight junctions at 180 degrees. Limit to min() of nominal speeds.
if (cos_theta > -0.95) {
// Compute maximum junction velocity based on maximum acceleration and junction deviation
double sin_theta_d2 = sqrt(0.5*(1.0-cos_theta)); // Trig half angle identity. Always positive.
vmax_junction = min(vmax_junction,
sqrt(block->acceleration * junction_deviation * sin_theta_d2/(float)(1.0-sin_theta_d2)) );
}
}
}
#endif
// Start with a safe speed
float vmax_junction = max_xy_jerk/2.0;
float vmax_junction_factor = 1.0;
if(fabs(current_speed[Z_AXIS]) > max_z_jerk/2.0) vmax_junction = fmin(vmax_junction, max_z_jerk/2.0);
if(fabs(current_speed[E_AXIS]) > max_e_jerk/2.0) vmax_junction = fmin(vmax_junction, max_e_jerk/2.0);
if(G92_reset_previous_speed == 1) {
vmax_junction = 0.1;
G92_reset_previous_speed = 0;
}
vmax_junction = fmin(vmax_junction, block->nominal_speed);
float safe_speed = vmax_junction;
if ((moves_queued > 1) && (previous_nominal_speed > 0.0001)) {
float jerk = sqrt(pow((current_speed[X_AXIS]-previous_speed[X_AXIS]), 2)+pow((current_speed[Y_AXIS]-previous_speed[Y_AXIS]), 2));
// if((fabs(previous_speed[X_AXIS]) > 0.0001) || (fabs(previous_speed[Y_AXIS]) > 0.0001)) {
vmax_junction = block->nominal_speed;
// }
if (jerk > max_xy_jerk) vmax_junction_factor = (max_xy_jerk/(float)(jerk));
if(fabs(current_speed[Z_AXIS] - previous_speed[Z_AXIS]) > max_z_jerk)
vmax_junction_factor= fmin(vmax_junction_factor, (max_z_jerk/fabs(current_speed[Z_AXIS] - previous_speed[Z_AXIS])));
if(fabs(current_speed[E_AXIS] - previous_speed[E_AXIS]) > max_e_jerk)
vmax_junction_factor = fmin(vmax_junction_factor, (max_e_jerk/fabs(current_speed[E_AXIS] - previous_speed[E_AXIS])));
vmax_junction = fmin(previous_nominal_speed, vmax_junction * vmax_junction_factor); // Limit speed to max previous speed
}
block->max_entry_speed = vmax_junction;
// Initialize block entry speed. Compute based on deceleration to user-defined MINIMUM_PLANNER_SPEED.
double v_allowable = max_allowable_speed(-block->acceleration,MINIMUM_PLANNER_SPEED,block->millimeters);
block->entry_speed = fmin(vmax_junction, v_allowable);
// Initialize planner efficiency flags
// Set flag if block will always reach maximum junction speed regardless of entry/exit speeds.
// If a block can de/ac-celerate from nominal speed to zero within the length of the block, then
// the current block and next block junction speeds are guaranteed to always be at their maximum
// junction speeds in deceleration and acceleration, respectively. This is due to how the current
// block nominal speed limits both the current and next maximum junction speeds. Hence, in both
// the reverse and forward planners, the corresponding block junction speed will always be at the
// the maximum junction speed and may always be ignored for any speed reduction checks.
if (block->nominal_speed <= v_allowable) block->nominal_length_flag = 1;
else block->nominal_length_flag = 0;
block->recalculate_flag = 1; // Always calculate trapezoid for new block
// Update previous path unit_vector and nominal speed
memcpy(previous_speed, current_speed, sizeof(previous_speed)); // previous_speed[] = current_speed[]
previous_nominal_speed = block->nominal_speed;
calculate_trapezoid_for_block(block, block->entry_speed/(float)(block->nominal_speed),
safe_speed/(float)(block->nominal_speed));
// Move buffer head
CRITICAL_SECTION_START;
block_buffer_head = next_buffer_head;
CRITICAL_SECTION_END;
// Update position
memcpy(position, target, sizeof(target)); // position[] = target[]
planner_recalculate();
#ifdef AUTOTEMP
getHighESpeed();
#endif
st_wake_up();
}
void manage_heater()
{
//Temperatur Monitor for repetier
if((millis() - previous_millis_monitor) > 250 )
{
previous_millis_monitor = millis();
if(manage_monitor <= 1)
{
showString(PSTR("MTEMP:"));
Serial.print(millis());
if(manage_monitor<1)
{
showString(PSTR(" "));
Serial.print(analog2temp(current_raw));
showString(PSTR(" "));
Serial.print(target_temp);
showString(PSTR(" "));
#ifdef PIDTEMP
Serial.println(heater_duty);
#else
#if (HEATER_0_PIN > -1)
if(READ(HEATER_0_PIN))
Serial.println(255);
else
Serial.println(0);
#else
Serial.println(0);
#endif
#endif
}
#if THERMISTORBED!=0
else
{
showString(PSTR(" "));
Serial.print(analog2tempBed(current_bed_raw));
showString(PSTR(" "));
Serial.print(analog2tempBed(target_bed_raw));
showString(PSTR(" "));
#if (HEATER_1_PIN > -1)
if(READ(HEATER_1_PIN))
Serial.println(255);
else
Serial.println(0);
#else
Serial.println(0);
#endif
}
#endif
}
}
// ENDE Temperatur Monitor for repetier
if((millis() - previous_millis_heater) < HEATER_CHECK_INTERVAL )
return;
previous_millis_heater = millis();
#ifdef HEATER_USES_THERMISTOR
current_raw = analogRead(TEMP_0_PIN);
#ifdef DEBUG_HEAT_MGMT
log_int("_HEAT_MGMT - analogRead(TEMP_0_PIN)", current_raw);
log_int("_HEAT_MGMT - NUMTEMPS", NUMTEMPS);
#endif
// When using thermistor, when the heater is colder than targer temp, we get a higher analog reading than target,
// this switches it up so that the reading appears lower than target for the control logic.
current_raw = 1023 - current_raw;
#elif defined HEATER_USES_AD595
current_raw = analogRead(TEMP_0_PIN);
#elif defined HEATER_USES_MAX6675
current_raw = read_max6675();
#endif
//MIN / MAX save to display the jitter of Heaterbarrel
if(current_raw > current_raw_maxval)
current_raw_maxval = current_raw;
if(current_raw < current_raw_minval)
current_raw_minval = current_raw;
#ifdef SMOOTHING
if (!nma) nma = SMOOTHFACTOR * current_raw;
nma = (nma + current_raw) - (nma / SMOOTHFACTOR);
current_raw = nma / SMOOTHFACTOR;
#endif
#ifdef WATCHPERIOD
if(watchmillis && millis() - watchmillis > WATCHPERIOD)
{
if(watch_raw + 1 >= current_raw)
{
target_temp = target_raw = 0;
WRITE(HEATER_0_PIN,LOW);
#ifdef PID_SOFT_PWM
g_heater_pwm_val = 0;
#else
analogWrite(HEATER_0_PIN, 0);
#if LED_PIN>-1
WRITE(LED_PIN,LOW);
#endif
#endif
}
else
{
watchmillis = 0;
}
}
#endif
//If tmp is lower then MINTEMP stop the Heater
//or it os better to deaktivate the uutput PIN or PWM ?
#ifdef MINTEMP
if(current_raw <= minttemp)
target_temp = target_raw = 0;
#endif
#ifdef MAXTEMP
if(current_raw >= maxttemp)
{
target_temp = target_raw = 0;
#if (ALARM_PIN > -1)
WRITE(ALARM_PIN,HIGH);
#endif
}
#endif
#if (TEMP_0_PIN > -1) || defined (HEATER_USES_MAX6675) || defined (HEATER_USES_AD595)
#ifdef PIDTEMP
int current_temp = analog2temp(current_raw);
error = target_temp - current_temp;
int delta_temp = current_temp - prev_temp;
prev_temp = current_temp;
pTerm = ((long)PID_PGAIN * error) / 256;
const int H0 = min(HEATER_DUTY_FOR_SETPOINT(target_temp),HEATER_CURRENT);
heater_duty = H0 + pTerm;
if(error < 30)
{
temp_iState += error;
temp_iState = constrain(temp_iState, temp_iState_min, temp_iState_max);
iTerm = ((long)PID_IGAIN * temp_iState) / 256;
heater_duty += iTerm;
}
int prev_error = abs(target_temp - prev_temp);
int log3 = 1; // discrete logarithm base 3, plus 1
if(prev_error > 81){ prev_error /= 81; log3 += 4; }
if(prev_error > 9){ prev_error /= 9; log3 += 2; }
if(prev_error > 3){ prev_error /= 3; log3 ++; }
dTerm = ((long)PID_DGAIN * delta_temp) / (256*log3);
heater_duty += dTerm;
heater_duty = constrain(heater_duty, 0, HEATER_CURRENT);
#ifdef PID_SOFT_PWM
g_heater_pwm_val = (unsigned char)heater_duty;
#else
analogWrite(HEATER_0_PIN, heater_duty);
#if LED_PIN>-1
analogWrite(LED_PIN, constrain(LED_PWM_FOR_BRIGHTNESS(heater_duty),0,255));
#endif
#endif
#else
if(current_raw >= target_raw)
{
WRITE(HEATER_0_PIN,LOW);
#if LED_PIN>-1
WRITE(LED_PIN,LOW);
#endif
}
else
{
WRITE(HEATER_0_PIN,HIGH);
#if LED_PIN > -1
WRITE(LED_PIN,HIGH);
#endif
}
#endif
#endif
if(millis() - previous_millis_bed_heater < BED_CHECK_INTERVAL)
return;
previous_millis_bed_heater = millis();
#ifndef TEMP_1_PIN
return;
#endif
#if TEMP_1_PIN == -1
return;
#else
#ifdef BED_USES_THERMISTOR
current_bed_raw = analogRead(TEMP_1_PIN);
#ifdef DEBUG_HEAT_MGMT
log_int("_HEAT_MGMT - analogRead(TEMP_1_PIN)", current_bed_raw);
log_int("_HEAT_MGMT - BNUMTEMPS", BNUMTEMPS);
#endif
// If using thermistor, when the heater is colder than targer temp, we get a higher analog reading than target,
// this switches it up so that the reading appears lower than target for the control logic.
current_bed_raw = 1023 - current_bed_raw;
#elif defined BED_USES_AD595
current_bed_raw = analogRead(TEMP_1_PIN);
#endif
#ifdef MINTEMP
if(current_bed_raw >= target_bed_raw || current_bed_raw < minttemp)
#else
if(current_bed_raw >= target_bed_raw)
#endif
{
WRITE(HEATER_1_PIN,LOW);
}
else
{
WRITE(HEATER_1_PIN,HIGH);
}
#endif
#ifdef CONTROLLERFAN_PIN
controllerFan(); //Check if fan should be turned on to cool stepper drivers down
#endif
}
