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Separate the maximum integral power for the bed from PID_INTEGRAL_DRIVE_MAX / PID_MAX.

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My PID_INTEGRAL_DRIVE_MAX was at 96, which was insufficient for my bed
to reach its intended temperature. The head requires a low maximum power since
I run on 24 volts and it has a somewhat low thermal mass.
This commit is contained in:
Jonathan Bastien-Filiatrault 2015-05-28 11:30:56 -04:00
parent a8a8f236d2
commit e86f2342c0
2 changed files with 4 additions and 2 deletions
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2
Marlin/Configuration.h
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@ -243,6 +243,8 @@ Here are some standard links for getting your machine calibrated:
//#define PID_BED_DEBUG // Sends debug data to the serial port. //#define PID_BED_DEBUG // Sends debug data to the serial port.
#ifdef PIDTEMPBED #ifdef PIDTEMPBED
#define PID_BED_INTEGRAL_DRIVE_MAX MAX_BED_POWER //limit for the integral term
//120v 250W silicone heater into 4mm borosilicate (MendelMax 1.5+) //120v 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
//from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10) //from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
#define DEFAULT_bedKp 10.00 #define DEFAULT_bedKp 10.00

4
Marlin/temperature.cpp
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@ -361,7 +361,7 @@ void updatePID() {
} }
#endif #endif
#ifdef PIDTEMPBED #ifdef PIDTEMPBED
temp_iState_max_bed = PID_INTEGRAL_DRIVE_MAX / bedKi; temp_iState_max_bed = PID_BED_INTEGRAL_DRIVE_MAX / bedKi;
#endif #endif
} }
@ -844,7 +844,7 @@ void tp_init() {
#endif //PIDTEMP #endif //PIDTEMP
#ifdef PIDTEMPBED #ifdef PIDTEMPBED
temp_iState_min_bed = 0.0; temp_iState_min_bed = 0.0;
temp_iState_max_bed = PID_INTEGRAL_DRIVE_MAX / bedKi; temp_iState_max_bed = PID_BED_INTEGRAL_DRIVE_MAX / bedKi;
#endif //PIDTEMPBED #endif //PIDTEMPBED
} }