Liebes Forum,
bis dato habe ich eigentlich alles in den Griff gekriegt, dieses Problem treibt mich aber in den Wahnsinn:
Mein Heizbett (MK2 an 12 V erst am Ramps 1.4 jetzt an DCDC SSR) heizt wie bekloppt weiter, auch, wenn es weit über den Sollwert raus ist. Ich habe versucht an den PID werten rumzuspielen, Autotuning zu nützen, auf BangBang gestellt, nichts hilft. Das skurrilste: wenn ich manuell die 60 oder 50 Grad anfahre habe ich keine Probleme. Der Wert wird haargenau getroffen und beibehalten. Marlin zeigt mir am Display an, dass es 50 Grad als Sollwert hat und heizt trotz 70 Grad Ist-Wert einfach weiter. Selbst wenn ich den Sollwert auf 0° stelle bleibt das so. Fast so, wie wenn er der Meinung wäre, dass der Sensor nicht zu diesem Heatbed gehört. Aber warum dann nicht, wenn ich im Marlin manuell den Sollwert vorgebe?
Als Slicer verwende ich Slic3r. Kann das an Slic3r Settings liegen?
Vielen Dank schon im Voraus und liebe Grüße,
Markus
//===========================================================================
//============================= PID Settings ================================
//===========================================================================
// PID Tuning Guide here: [reprap.org]
// Comment the following line to disable PID and enable bang-bang.
#define PIDTEMP
#define BANG_MAX 255 // limits current to nozzle while in bang-bang mode; 255=full current
#define PID_MAX BANG_MAX // 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
//#define SLOW_PWM_HEATERS // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
//#define PID_PARAMS_PER_EXTRUDER // Uses separate PID parameters for each extruder (useful for mismatched extruders)
// Set/get with gcode: M301 E[extruder number, 0-2]
#define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
// is more then PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
#define PID_INTEGRAL_DRIVE_MAX PID_MAX //limit for the integral term
#define K1 0.95 //smoothing factor within the PID
#define PID_dT ((OVERSAMPLENR * 10.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine
// If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
// Ultimaker
//Used PID Autotuning at 200C
#define DEFAULT_Kp 28.55
#define DEFAULT_Ki 1.6
#define DEFAULT_Kd 127.72
// MakerGear
// #define DEFAULT_Kp 7.0
// #define DEFAULT_Ki 0.1
// #define DEFAULT_Kd 12
// Mendel Parts V9 on 12V
// #define DEFAULT_Kp 63.0
// #define DEFAULT_Ki 2.25
// #define DEFAULT_Kd 440
#endif // PIDTEMP
//===========================================================================
//============================= PID > Bed Temperature Control ===============
//===========================================================================
// Select PID or bang-bang with PIDTEMPBED. If bang-bang, BED_LIMIT_SWITCHING will enable hysteresis
//
// Uncomment this to enable PID on the bed. It uses the same frequency PWM as the extruder.
// If your PID_dT above is the default, and correct for your hardware/configuration, that means 7.689Hz,
// which is fine for driving a square wave into a resistive load and does not significantly impact you FET heating.
// This also works fine on a Fotek SSR-10DA Solid State Relay into a 250W heater.
// If your configuration is significantly different than this and you don't understand the issues involved, you probably
// shouldn't use bed PID until someone else verifies your hardware works.
// If this is enabled, find your own PID constants below.
//#define PIDTEMPBED
//
#define BED_LIMIT_SWITCHING
// This sets the max power delivered 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 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 255 // limits duty cycle to bed; 255=full current
#ifdef PIDTEMPBED
//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)
//original values; works well for Sparkcube MK2
#define DEFAULT_bedKp 10.0
#define DEFAULT_bedKi .023
#define DEFAULT_bedKd 305.4
//sparkcube MK2 4mm alu. Used autotune: Too slow!
// #define DEFAULT_bedKp 437.54
// #define DEFAULT_bedKi 51.86
// #define DEFAULT_bedKd 922.83
//120v 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
//from pidautotune
// #define DEFAULT_bedKp 97.1
// #define DEFAULT_bedKi 1.41
// #define DEFAULT_bedKd 1675.16
// FIND YOUR OWN: "M303 E-1 C8 S90" to run autotune on the bed at 90 degreesC for 8 cycles.
#endif // PIDTEMPBED
//this prevents dangerous Extruder moves, i.e. if the temperature is under the limit
//can be software-disabled for whatever purposes by
#define PREVENT_DANGEROUS_EXTRUDE
//if PREVENT_DANGEROUS_EXTRUDE is on, you can still disable (uncomment) very long bits of extrusion separately.
#define PREVENT_LENGTHY_EXTRUDE
#define EXTRUDE_MINTEMP 170
#define EXTRUDE_MAXLENGTH (X_MAX_LENGTH+Y_MAX_LENGTH) //prevent extrusion of very large distances.
3-mal bearbeitet. Zuletzt am 14.06.15 07:24.
. Da drauf wäre ich so schnell nicht gekommen!
