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M303 Autotune use HEATER_CURRENT for Maximum PWM Value

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midopple 2012-08-27 17:35:54 +02:00
parent 3e6cce46ae
commit e206720abf
2 changed files with 7 additions and 7 deletions
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2
Sprinter/Configuration.h
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@ -308,7 +308,7 @@ const int dropsegments=5; //everything with less than this number of steps will
#define LED_PWM_FOR_BRIGHTNESS(brightness) ((64*brightness-1384)/(300-brightness))
#endif
// Change this value (range 1-255) to limit the current to the nozzle
// Change this value (range 30-255) to limit the current to the nozzle
#define HEATER_CURRENT 255
// How often should the heater check for new temp readings, in milliseconds

12
Sprinter/heater.cpp
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@ -314,7 +314,7 @@ void PID_autotune(int PIDAT_test_temp)
float PIDAT_max, PIDAT_min;
unsigned char PIDAT_PWM_val = 255;
unsigned char PIDAT_PWM_val = HEATER_CURRENT;
unsigned char PIDAT_cycles=0;
bool PIDAT_heating = true;
@ -329,8 +329,8 @@ void PID_autotune(int PIDAT_test_temp)
long PIDAT_t_high;
long PIDAT_t_low;
long PIDAT_bias= 127;
long PIDAT_d = 127;
long PIDAT_bias= HEATER_CURRENT/2;
long PIDAT_d = HEATER_CURRENT/2;
float PIDAT_Ku, PIDAT_Tu;
float PIDAT_Kp, PIDAT_Ki, PIDAT_Kd;
@ -404,8 +404,8 @@ void PID_autotune(int PIDAT_test_temp)
if(PIDAT_cycles > 0)
{
PIDAT_bias += (PIDAT_d*(PIDAT_t_high - PIDAT_t_low))/(PIDAT_t_low + PIDAT_t_high);
PIDAT_bias = constrain(PIDAT_bias, 20 ,235);
if(PIDAT_bias > 127) PIDAT_d = 254 - PIDAT_bias;
PIDAT_bias = constrain(PIDAT_bias, 20 ,HEATER_CURRENT - 20);
if(PIDAT_bias > (HEATER_CURRENT/2)) PIDAT_d = (HEATER_CURRENT - 1) - PIDAT_bias;
else PIDAT_d = PIDAT_bias;
showString(PSTR(" bias: ")); Serial.print(PIDAT_bias);
@ -466,7 +466,7 @@ void PID_autotune(int PIDAT_test_temp)
#endif
}
if(PIDAT_input > (PIDAT_test_temp + 20))
if(PIDAT_input > (PIDAT_test_temp + 25))
{
showString(PSTR("PID Autotune failed! Temperature to high\r\n"));
return;