diff --git a/Marlin/ConfigurationStore.cpp b/Marlin/ConfigurationStore.cpp
index 8e4a32805b935363dfc82590db392ec3cf0e3438..58335ea0e104a06901ad0639694aa54b473a4960 100644
--- a/Marlin/ConfigurationStore.cpp
+++ b/Marlin/ConfigurationStore.cpp
@@ -38,7 +38,7 @@ void _EEPROM_readData(int &pos, uint8_t* value, uint8_t size)
// wrong data being written to the variables.
// ALSO: always make sure the variables in the Store and retrieve sections are in the same order.
-#define EEPROM_VERSION "V13"
+#define EEPROM_VERSION "V14"
#ifdef EEPROM_SETTINGS
void Config_StoreSettings()
@@ -63,11 +63,11 @@ void Config_StoreSettings()
EEPROM_WRITE_VAR(i,delta_radius);
EEPROM_WRITE_VAR(i,delta_diagonal_rod);
EEPROM_WRITE_VAR(i,delta_segments_per_second);
- #endif
+ #endif//DELTA
#ifndef ULTIPANEL
int plaPreheatHotendTemp = PLA_PREHEAT_HOTEND_TEMP, plaPreheatHPBTemp = PLA_PREHEAT_HPB_TEMP, plaPreheatFanSpeed = PLA_PREHEAT_FAN_SPEED;
int absPreheatHotendTemp = ABS_PREHEAT_HOTEND_TEMP, absPreheatHPBTemp = ABS_PREHEAT_HPB_TEMP, absPreheatFanSpeed = ABS_PREHEAT_FAN_SPEED;
- #endif
+ #endif//ULTIPANEL
EEPROM_WRITE_VAR(i,plaPreheatHotendTemp);
EEPROM_WRITE_VAR(i,plaPreheatHPBTemp);
EEPROM_WRITE_VAR(i,plaPreheatFanSpeed);
@@ -76,37 +76,58 @@ void Config_StoreSettings()
EEPROM_WRITE_VAR(i,absPreheatFanSpeed);
EEPROM_WRITE_VAR(i,zprobe_zoffset);
#ifdef PIDTEMP
- EEPROM_WRITE_VAR(i,Kp);
- EEPROM_WRITE_VAR(i,Ki);
- EEPROM_WRITE_VAR(i,Kd);
- #else
+ float dummy = 0.0f;
+ for (int e = 0; e < 3; e++)
+ {
+ if (e < EXTRUDERS)
+ {
+ EEPROM_WRITE_VAR(i,Kp[e]);
+ EEPROM_WRITE_VAR(i,Ki[e]);
+ EEPROM_WRITE_VAR(i,Kd[e]);
+ #ifdef PID_ADD_EXTRUSION_RATE
+ EEPROM_WRITE_VAR(i,Kc[e]);
+ #else//PID_ADD_EXTRUSION_RATE
+ dummy = 1.0f; // 1.0 = default kc
+ EEPROM_WRITE_VAR(dummmy);
+ #endif//PID_ADD_EXTRUSION_RATE
+ }
+ else
+ {
+ dummy = 3000.0f;
+ EEPROM_WRITE_VAR(i, dummy);
+ dummy = 0.0f;
+ EEPROM_WRITE_VAR(i,dummy);
+ EEPROM_WRITE_VAR(i,dummy);
+ }
+ }
+ #else//PIDTEMP
float dummy = 3000.0f;
EEPROM_WRITE_VAR(i,dummy);
dummy = 0.0f;
EEPROM_WRITE_VAR(i,dummy);
EEPROM_WRITE_VAR(i,dummy);
- #endif
+ #endif//PIDTEMP
#ifndef DOGLCD
int lcd_contrast = 32;
- #endif
+ #endif//DOGLCD
EEPROM_WRITE_VAR(i,lcd_contrast);
#ifdef SCARA
EEPROM_WRITE_VAR(i,axis_scaling); // Add scaling for SCARA
- #endif
+ #endif//SCARA
#ifdef FWRETRACT
EEPROM_WRITE_VAR(i,autoretract_enabled);
EEPROM_WRITE_VAR(i,retract_length);
#if EXTRUDERS > 1
EEPROM_WRITE_VAR(i,retract_length_swap);
- #endif
+ #endif//EXTRUDERS > 1
EEPROM_WRITE_VAR(i,retract_feedrate);
EEPROM_WRITE_VAR(i,retract_zlift);
EEPROM_WRITE_VAR(i,retract_recover_length);
#if EXTRUDERS > 1
EEPROM_WRITE_VAR(i,retract_recover_length_swap);
- #endif
+ #endif//EXTRUDERS > 1
EEPROM_WRITE_VAR(i,retract_recover_feedrate);
- #endif
+ #endif//FWRETRACT
// Save filament sizes
EEPROM_WRITE_VAR(i, volumetric_enabled);
@@ -115,8 +136,8 @@ void Config_StoreSettings()
EEPROM_WRITE_VAR(i, filament_size[1]);
#if EXTRUDERS > 2
EEPROM_WRITE_VAR(i, filament_size[2]);
- #endif
- #endif
+ #endif//EXTRUDERS > 2
+ #endif//EXTRUDERS > 1
char ver2[4]=EEPROM_VERSION;
i=EEPROM_OFFSET;
@@ -149,7 +170,7 @@ SERIAL_ECHOLNPGM("Scaling factors:");
SERIAL_ECHOLN("");
SERIAL_ECHO_START;
-#endif
+#endif//SCARA
SERIAL_ECHOLNPGM("Maximum feedrates (mm/s):");
SERIAL_ECHO_START;
SERIAL_ECHOPAIR(" M203 X", max_feedrate[X_AXIS]);
@@ -206,16 +227,23 @@ SERIAL_ECHOLNPGM("Scaling factors:");
SERIAL_ECHOPAIR(" R" ,delta_radius );
SERIAL_ECHOPAIR(" S" ,delta_segments_per_second );
SERIAL_ECHOLN("");
-#endif
+#endif//DELTA
#ifdef PIDTEMP
SERIAL_ECHO_START;
SERIAL_ECHOLNPGM("PID settings:");
- SERIAL_ECHO_START;
- SERIAL_ECHOPAIR(" M301 P",Kp);
- SERIAL_ECHOPAIR(" I" ,unscalePID_i(Ki));
- SERIAL_ECHOPAIR(" D" ,unscalePID_d(Kd));
- SERIAL_ECHOLN("");
-#endif
+ for (int e = 0; e < EXTRUDERS; e++)
+ {
+ SERIAL_ECHO_START;
+ SERIAL_ECHOPAIR(" M301 E", (long unsigned int)e);
+ SERIAL_ECHOPAIR(" P", Kp[e]);
+ SERIAL_ECHOPAIR(" I" ,unscalePID_i(Ki[e]));
+ SERIAL_ECHOPAIR(" D" ,unscalePID_d(Kd[e]));
+#ifdef PID_ADD_EXTRUSION_RATE
+ SERIAL_ECHOPAIR(" C" ,Kc[e]);
+#endif//PID_ADD_EXTRUSION_RATE
+ SERIAL_ECHOLN("");
+ }
+#endif//PIDTEMP
#ifdef FWRETRACT
SERIAL_ECHO_START;
SERIAL_ECHOLNPGM("Retract: S=Length (mm) F:Speed (mm/m) Z: ZLift (mm)");
@@ -244,7 +272,7 @@ SERIAL_ECHOLNPGM("Scaling factors:");
SERIAL_ECHO_START;
SERIAL_ECHOPAIR(" Swap rec. addl. length (mm): ", retract_recover_length_swap);
SERIAL_ECHOLN("");
-#endif
+#endif//EXTRUDERS > 1
SERIAL_ECHO_START;
if (volumetric_enabled) {
SERIAL_ECHOLNPGM("Filament settings:");
@@ -259,14 +287,14 @@ SERIAL_ECHOLNPGM("Scaling factors:");
SERIAL_ECHO_START;
SERIAL_ECHOPAIR(" M200 T2 D", filament_size[2]);
SERIAL_ECHOLN("");
-#endif
-#endif
+#endif//EXTRUDERS > 2
+#endif//EXTRUDERS > 1
} else {
SERIAL_ECHOLNPGM("Filament settings: Disabled");
}
-#endif
+#endif//FWRETRACT
}
-#endif
+#endif//DISABLE_M503
#ifdef EEPROM_SETTINGS
@@ -301,11 +329,11 @@ void Config_RetrieveSettings()
EEPROM_READ_VAR(i,delta_radius);
EEPROM_READ_VAR(i,delta_diagonal_rod);
EEPROM_READ_VAR(i,delta_segments_per_second);
- #endif
+ #endif//DELTA
#ifndef ULTIPANEL
int plaPreheatHotendTemp, plaPreheatHPBTemp, plaPreheatFanSpeed;
int absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed;
- #endif
+ #endif//ULTIPANEL
EEPROM_READ_VAR(i,plaPreheatHotendTemp);
EEPROM_READ_VAR(i,plaPreheatHPBTemp);
EEPROM_READ_VAR(i,plaPreheatFanSpeed);
@@ -313,35 +341,68 @@ void Config_RetrieveSettings()
EEPROM_READ_VAR(i,absPreheatHPBTemp);
EEPROM_READ_VAR(i,absPreheatFanSpeed);
EEPROM_READ_VAR(i,zprobe_zoffset);
- #ifndef PIDTEMP
- float Kp,Ki,Kd;
- #endif
- // do not need to scale PID values as the values in EEPROM are already scaled
- EEPROM_READ_VAR(i,Kp);
- EEPROM_READ_VAR(i,Ki);
- EEPROM_READ_VAR(i,Kd);
+ #ifdef PIDTEMP
+ float dummy = 0.0f;
+ for (int e = 0; e < 3; e++) // 3 = max extruders supported by marlin
+ {
+ if (e < EXTRUDERS)
+ {
+ // do not need to scale PID values as the values in EEPROM are already scaled
+ EEPROM_READ_VAR(i,Kp[e]);
+ EEPROM_READ_VAR(i,Ki[e]);
+ EEPROM_READ_VAR(i,Kd[e]);
+#ifdef PID_ADD_EXTRUSION_RATE
+ EEPROM_READ_VAR(i,Kc[e]);
+#else//PID_ADD_EXTRUSION_RATE
+ EEPROM_READ_VAR(i,dummy);
+#endif//PID_ADD_EXTRUSION_RATE
+ }
+ else
+ {
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ }
+ }
+ #else//PIDTEMP
+ // 4 x 3 = 12 slots for PID parameters
+ float dummy = 0.0f;
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ EEPROM_READ_VAR(i,dummy);
+ #endif//PIDTEMP
#ifndef DOGLCD
int lcd_contrast;
- #endif
+ #endif//DOGLCD
EEPROM_READ_VAR(i,lcd_contrast);
#ifdef SCARA
EEPROM_READ_VAR(i,axis_scaling);
- #endif
+ #endif//SCARA
#ifdef FWRETRACT
EEPROM_READ_VAR(i,autoretract_enabled);
EEPROM_READ_VAR(i,retract_length);
#if EXTRUDERS > 1
EEPROM_READ_VAR(i,retract_length_swap);
- #endif
+ #endif//EXTRUDERS > 1
EEPROM_READ_VAR(i,retract_feedrate);
EEPROM_READ_VAR(i,retract_zlift);
EEPROM_READ_VAR(i,retract_recover_length);
#if EXTRUDERS > 1
EEPROM_READ_VAR(i,retract_recover_length_swap);
- #endif
+ #endif//EXTRUDERS > 1
EEPROM_READ_VAR(i,retract_recover_feedrate);
- #endif
+ #endif//FWRETRACT
EEPROM_READ_VAR(i, volumetric_enabled);
EEPROM_READ_VAR(i, filament_size[0]);
@@ -349,8 +410,8 @@ void Config_RetrieveSettings()
EEPROM_READ_VAR(i, filament_size[1]);
#if EXTRUDERS > 2
EEPROM_READ_VAR(i, filament_size[2]);
-#endif
-#endif
+#endif//EXTRUDERS > 2
+#endif//EXTRUDERS > 1
calculate_volumetric_multipliers();
// Call updatePID (similar to when we have processed M301)
updatePID();
@@ -363,9 +424,9 @@ void Config_RetrieveSettings()
}
#ifdef EEPROM_CHITCHAT
Config_PrintSettings();
- #endif
+ #endif//EEPROM_CHITCHAT
}
-#endif
+#endif//EEPROM_SETTINGS
void Config_ResetDefault()
{
@@ -379,7 +440,7 @@ void Config_ResetDefault()
max_acceleration_units_per_sq_second[i]=tmp3[i];
#ifdef SCARA
axis_scaling[i]=1;
- #endif
+ #endif//SCARA
}
// steps per sq second need to be updated to agree with the units per sq second
@@ -400,7 +461,7 @@ void Config_ResetDefault()
delta_diagonal_rod= DELTA_DIAGONAL_ROD;
delta_segments_per_second= DELTA_SEGMENTS_PER_SECOND;
recalc_delta_settings(delta_radius, delta_diagonal_rod);
-#endif
+#endif//DELTA
#ifdef ULTIPANEL
plaPreheatHotendTemp = PLA_PREHEAT_HOTEND_TEMP;
plaPreheatHPBTemp = PLA_PREHEAT_HPB_TEMP;
@@ -408,24 +469,25 @@ void Config_ResetDefault()
absPreheatHotendTemp = ABS_PREHEAT_HOTEND_TEMP;
absPreheatHPBTemp = ABS_PREHEAT_HPB_TEMP;
absPreheatFanSpeed = ABS_PREHEAT_FAN_SPEED;
-#endif
+#endif//ULTIPANEL
#ifdef ENABLE_AUTO_BED_LEVELING
zprobe_zoffset = -Z_PROBE_OFFSET_FROM_EXTRUDER;
-#endif
+#endif//ENABLE_AUTO_BED_LEVELING
#ifdef DOGLCD
lcd_contrast = DEFAULT_LCD_CONTRAST;
-#endif
+#endif//DOGLCD
#ifdef PIDTEMP
- Kp = DEFAULT_Kp;
- Ki = scalePID_i(DEFAULT_Ki);
- Kd = scalePID_d(DEFAULT_Kd);
-
- // call updatePID (similar to when we have processed M301)
- updatePID();
-
+ for (int e = 0; e < EXTRUDERS; e++)
+ {
+ Kp[e] = DEFAULT_Kp;
+ Ki[e] = scalePID_i(DEFAULT_Ki);
+ Kd[e] = scalePID_d(DEFAULT_Kd);
#ifdef PID_ADD_EXTRUSION_RATE
- Kc = DEFAULT_Kc;
+ Kc[e] = DEFAULT_Kc;
#endif//PID_ADD_EXTRUSION_RATE
+ }
+ // call updatePID (similar to when we have processed M301)
+ updatePID();
#endif//PIDTEMP
#ifdef FWRETRACT
@@ -433,15 +495,15 @@ void Config_ResetDefault()
retract_length = RETRACT_LENGTH;
#if EXTRUDERS > 1
retract_length_swap = RETRACT_LENGTH_SWAP;
-#endif
+#endif//EXTRUDERS > 1
retract_feedrate = RETRACT_FEEDRATE;
retract_zlift = RETRACT_ZLIFT;
retract_recover_length = RETRACT_RECOVER_LENGTH;
#if EXTRUDERS > 1
retract_recover_length_swap = RETRACT_RECOVER_LENGTH_SWAP;
-#endif
+#endif//EXTRUDERS > 1
retract_recover_feedrate = RETRACT_RECOVER_FEEDRATE;
-#endif
+#endif//FWRETRACT
volumetric_enabled = false;
filament_size[0] = DEFAULT_NOMINAL_FILAMENT_DIA;
@@ -449,11 +511,11 @@ void Config_ResetDefault()
filament_size[1] = DEFAULT_NOMINAL_FILAMENT_DIA;
#if EXTRUDERS > 2
filament_size[2] = DEFAULT_NOMINAL_FILAMENT_DIA;
-#endif
-#endif
+#endif//EXTRUDERS > 2
+#endif//EXTRUDERS > 1
calculate_volumetric_multipliers();
SERIAL_ECHO_START;
SERIAL_ECHOLNPGM("Hardcoded Default Settings Loaded");
-}
+}
\ No newline at end of file
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 0862e1fe035307bf583b4194980b7906c6a9dbc5..203f52cb476f841ae86ce0188076e25a71aa8e6f 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3196,30 +3196,50 @@ Sigma_Exit:
#endif // M300
#ifdef PIDTEMP
- case 301: // M301
- {
- if(code_seen('P')) Kp = code_value();
- if(code_seen('I')) Ki = scalePID_i(code_value());
- if(code_seen('D')) Kd = scalePID_d(code_value());
+ case 301: // M301
+ {
- #ifdef PID_ADD_EXTRUSION_RATE
- if(code_seen('C')) Kc = code_value();
- #endif
+ // multi-extruder PID patch: M301 updates or prints a single extruder's PID values
+ // default behaviour (omitting E parameter) is to update for extruder 0 only
+ int e = 0; // extruder being updated
+ if (code_seen('E'))
+ {
+ e = (int)code_value();
+ }
+ if (e < EXTRUDERS) // catch bad input value
+ {
+
+ if (code_seen('P')) Kp[e] = code_value();
+ if (code_seen('I')) Ki[e] = scalePID_i(code_value());
+ if (code_seen('D')) Kd[e] = scalePID_d(code_value());
+ #ifdef PID_ADD_EXTRUSION_RATE
+ if (code_seen('C')) Kc[e] = code_value();
+ #endif
+
+ updatePID();
+ SERIAL_PROTOCOL(MSG_OK);
+ SERIAL_PROTOCOL(" e:"); // specify extruder in serial output
+ SERIAL_PROTOCOL(e);
+ SERIAL_PROTOCOL(" p:");
+ SERIAL_PROTOCOL(Kp[e]);
+ SERIAL_PROTOCOL(" i:");
+ SERIAL_PROTOCOL(unscalePID_i(Ki[e]));
+ SERIAL_PROTOCOL(" d:");
+ SERIAL_PROTOCOL(unscalePID_d(Kd[e]));
+ #ifdef PID_ADD_EXTRUSION_RATE
+ SERIAL_PROTOCOL(" c:");
+ //Kc does not have scaling applied above, or in resetting defaults
+ SERIAL_PROTOCOL(Kc[e]);
+ #endif
+ SERIAL_PROTOCOLLN("");
+
+ }
+ else
+ {
+ SERIAL_ECHO_START;
+ SERIAL_ECHOLN(MSG_INVALID_EXTRUDER);
+ }
- updatePID();
- SERIAL_PROTOCOL(MSG_OK);
- SERIAL_PROTOCOL(" p:");
- SERIAL_PROTOCOL(Kp);
- SERIAL_PROTOCOL(" i:");
- SERIAL_PROTOCOL(unscalePID_i(Ki));
- SERIAL_PROTOCOL(" d:");
- SERIAL_PROTOCOL(unscalePID_d(Kd));
- #ifdef PID_ADD_EXTRUSION_RATE
- SERIAL_PROTOCOL(" c:");
- //Kc does not have scaling applied above, or in resetting defaults
- SERIAL_PROTOCOL(Kc);
- #endif
- SERIAL_PROTOCOLLN("");
}
break;
#endif //PIDTEMP
diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 8bdb7647f875f139fcbe9e5c3a4601ef90572f64..6d6107a7c48ac50c6d0664fe4e6ff89ad27b27d1 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -50,14 +50,6 @@ float current_temperature_bed = 0.0;
int redundant_temperature_raw = 0;
float redundant_temperature = 0.0;
#endif
-#ifdef PIDTEMP
- float Kp=DEFAULT_Kp;
- float Ki=(DEFAULT_Ki*PID_dT);
- float Kd=(DEFAULT_Kd/PID_dT);
- #ifdef PID_ADD_EXTRUSION_RATE
- float Kc=DEFAULT_Kc;
- #endif
-#endif //PIDTEMP
#ifdef PIDTEMPBED
float bedKp=DEFAULT_bedKp;
@@ -133,6 +125,15 @@ static volatile bool temp_meas_ready = false;
# define ARRAY_BY_EXTRUDERS(v1, v2, v3) { v1 }
#endif
+#ifdef PIDTEMP
+ float Kp[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp);
+ float Ki[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT);
+ float Kd[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT);
+#ifdef PID_ADD_EXTRUSION_RATE
+ float Kc[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc);
+#endif
+#endif //PIDTEMP
+
// Init min and max temp with extreme values to prevent false errors during startup
static int minttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_LO_TEMP , HEATER_1_RAW_LO_TEMP , HEATER_2_RAW_LO_TEMP );
static int maxttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_HI_TEMP , HEATER_1_RAW_HI_TEMP , HEATER_2_RAW_HI_TEMP );
@@ -342,7 +343,7 @@ void updatePID()
{
#ifdef PIDTEMP
for(int e = 0; e < EXTRUDERS; e++) {
- temp_iState_max[e] = PID_INTEGRAL_DRIVE_MAX / Ki;
+ temp_iState_max[e] = PID_INTEGRAL_DRIVE_MAX / Ki[e];
}
#endif
#ifdef PIDTEMPBED
@@ -463,14 +464,14 @@ void manage_heater()
temp_iState[e] = 0.0;
pid_reset[e] = false;
}
- pTerm[e] = Kp * pid_error[e];
+ pTerm[e] = Kp[e] * 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];
+ iTerm[e] = Ki[e] * 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]);
+ dTerm[e] = (Kd[e] * (pid_input - temp_dState[e]))*K2 + (K1 * dTerm[e]);
pid_output = pTerm[e] + iTerm[e] - dTerm[e];
if (pid_output > PID_MAX) {
if (pid_error[e] > 0 ) temp_iState[e] -= pid_error[e]; // conditional un-integration
@@ -810,7 +811,7 @@ void tp_init()
maxttemp[e] = maxttemp[0];
#ifdef PIDTEMP
temp_iState_min[e] = 0.0;
- temp_iState_max[e] = PID_INTEGRAL_DRIVE_MAX / Ki;
+ temp_iState_max[e] = PID_INTEGRAL_DRIVE_MAX / Ki[e];
#endif //PIDTEMP
#ifdef PIDTEMPBED
temp_iState_min_bed = 0.0;
diff --git a/Marlin/temperature.h b/Marlin/temperature.h
index 95c351489087512b31e539755dcc14874e9b1079..1c7601964bbaadf1722a045981118ad3454010c8 100644
--- a/Marlin/temperature.h
+++ b/Marlin/temperature.h
@@ -58,7 +58,7 @@ extern float current_temperature_bed;
#endif
#ifdef PIDTEMP
- extern float Kp,Ki,Kd,Kc;
+ extern float Kp[EXTRUDERS], Ki[EXTRUDERS], Kd[EXTRUDERS], Kc[EXTRUDERS];
float scalePID_i(float i);
float scalePID_d(float d);
float unscalePID_i(float i);