2026-10-10 14:24:37 +02:00
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# iHeater chamber heater: MCU, heater, sensors and M141/M191
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2026-10-10 13:45:11 +02:00
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#========================================================
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#=====================iHeater cfg========================
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#========================================================
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#=====================iHeater pins=======================
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[board_pins iHeater_Aliases]
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mcu: iHeater
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aliases:
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TH0=PA3, TH1=PA0, TH2=PB1,
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HEATER=PA1, FAN=PA2,
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MODE=PA4,
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LED1=PA7, LED2=PA6, LED3=PA5,
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USART1_TX=PA9, USART1_RX=PA10
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#=====================iHeater mcu=======================
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# [mcu]
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# serial: /dev/serial/by-id/usb-Klipper_stm32f042x6_0C0018000D53304347373020-if00
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[mcu iHeater] #second MCU
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#is_non_critical: true: true # flag this as non critical
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serial: /dev/serial/by-id/usb-Klipper_stm32f042x6_0C0020000E43304754393320-if00
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restart_method: command
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[temperature_sensor iHeater]
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sensor_type: temperature_mcu
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sensor_mcu: iHeater
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#============================================================
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#======================= iHeater CONFIG ======================
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#============================================================
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# Make sure to perform PID calibration for the chamber heater:
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#🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
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# PID_CALIBRATE HEATER=iHeater_H TARGET=70
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#🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
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# This is essential for accurate and stable chamber heating.
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# Without PID tuning, the temperature may overshoot or take too long to stabilize!
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#===========================================================
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[heater_generic iHeater_H]
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heater_pin: iHeater:HEATER
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max_power: 1
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sensor_type: NTC 100K MGB18-104F39050L32
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sensor_pin: iHeater:TH0
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pwm_cycle_time: 0.3
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min_temp: 0
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max_temp: 120
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control: pid
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# pid_Kp: 37.948
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# pid_Ki: 2.040
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# pid_Kd: 176.497
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pid_Kp: 26.656
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pid_Ki: 0.96
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pid_Kd: 184.971
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[verify_heater iHeater_H]
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max_error: 240
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check_gain_time: 1800
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heating_gain: 1
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[heater_fan chamber_heater_fan]
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pin: iHeater:FAN
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heater: iHeater_H
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heater_temp: 50.0
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fan_speed: 1.0
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shutdown_speed: 0
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kick_start_time: 0.5
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[temperature_sensor iHeater_S]
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sensor_pin: iHeater:TH1
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sensor_type: NTC 100K MGB18-104F39050L32
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min_temp: 0
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max_temp: 140
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# [temperature_sensor iHeater_Chamber_ext]
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# sensor_pin: iHeater:TH2
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# sensor_type: NTC 100K MGB18-104F39050L32
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# min_temp: 0
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# max_temp: 140
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[gcode_button mode_button]
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pin: iHeater:MODE
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# debounce_delay: 50
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press_gcode: iHEATER_OFF
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# [output_pin led_1]
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# pin: iHeater:LED1
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# [output_pin led_2]
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# pin: iHeater:LED2
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# [output_pin led_3]
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# pin: iHeater:LED3
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#######################################################
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##########################SETUP########################
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#######################################################
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[gcode_macro CHAMBER_VARS]
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variable_chamber_target: 0 # target chamber temperature, °C
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variable_start_offset: 10 # printing can start when chamber reaches (target - offset)
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variable_delta_temp: 10 # delta between chamber and heater, °C
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variable_min_heater_temp: 50 # minimum heater temperature (for cooling), °C
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variable_max_heater_temp: 100 # maximum heater temperature, °C
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variable_control_interval: 1.0 # interval for control function call, seconds
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variable_air_min_delta: 0.5 # minimum difference between desired and current chamber temperature (heater temp = desired + delta_temp), °C
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variable_air_max_delta: 5.0 # maximum difference between desired and current chamber temperature (heater temp = max_heater_temp), °C
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gcode:
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##########################MACRO########################
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[gcode_macro M141]
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#rename_existing: M141.1
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gcode:
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# Get desired chamber temperature:
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# - if parameter S is passed, use it
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# - otherwise use chamber_target from CHAMBER_VARS
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{% set chamber_target = params.S|default(printer["gcode_macro CHAMBER_VARS"].chamber_target)|int %}
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# Get delta temperature:
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# - if parameter D is passed, use it
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# - otherwise use delta_temp from CHAMBER_VARS
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{% set delta_temp = params.D|default(printer["gcode_macro CHAMBER_VARS"].delta_temp)|int %}
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# Get maximum heater temperature:
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# - if parameter H is passed, use it
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# - otherwise use max_heater_temp from CHAMBER_VARS
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{% set max_heater_temp = params.H|default(printer["gcode_macro CHAMBER_VARS"].max_heater_temp)|int %}
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# Get interval for control function call
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{% set control_interval = printer["gcode_macro CHAMBER_VARS"].control_interval|float %}
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RESPOND prefix="M141" msg="S{chamber_target} D{delta_temp} H{max_heater_temp}"
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# Save parameters to CHAMBER_VARS for delayed_gcode
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SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=chamber_target VALUE={chamber_target}
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SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=delta_temp VALUE={delta_temp}
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SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=max_heater_temp VALUE={max_heater_temp}
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# Initial calculation
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iHEATER_CONTROL
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# Start temperature control macro
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UPDATE_DELAYED_GCODE ID=_iHEATER_CONTROL DURATION={control_interval}
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[gcode_macro M191]
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#rename_existing: M191.1
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gcode:
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# Get desired chamber temperature:
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# - if parameter S is passed, use it
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# - otherwise use chamber_target from CHAMBER_VARS
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{% set chamber_target = params.S|default(printer["gcode_macro CHAMBER_VARS"].chamber_target)|int %}
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# Get delta temperature:
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# - if parameter D is passed, use it
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# - otherwise use delta_temp from CHAMBER_VARS
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{% set delta_temp = params.D|default(printer["gcode_macro CHAMBER_VARS"].delta_temp)|int %}
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# Get maximum heater temperature:
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# - if parameter H is passed, use it
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# - otherwise use max_heater_temp from CHAMBER_VARS
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{% set max_heater_temp = params.H|default(printer["gcode_macro CHAMBER_VARS"].max_heater_temp)|int %}
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# Get minimum chamber temperature for print start:
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# - if parameter W is passed, use it
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# - otherwise use start_offset from CHAMBER_VARS
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{% set start_offset = params.W|default(printer["gcode_macro CHAMBER_VARS"].start_offset)|int %}
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RESPOND prefix="M191" msg="S{chamber_target} D{delta_temp} H{max_heater_temp} W{start_offset}"
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M141 S{chamber_target} D{delta_temp} H{max_heater_temp}
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# Save parameter to CHAMBER_VARS
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SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=start_offset VALUE={start_offset}
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# Wait until chamber reaches the target temperature
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TEMPERATURE_WAIT SENSOR="temperature_sensor iHeater_S" MINIMUM={chamber_target - start_offset}
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RESPOND prefix="M191" msg="Chamber reached {chamber_target - start_offset}°C"
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[gcode_macro iHEATER_ON]
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description: Alternative to M141 & M191 with alternative parameter names
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gcode:
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{% set s = params.CHAMBER_TEMP|default(printer["gcode_macro CHAMBER_VARS"].chamber_target)|int %}
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{% set d = params.DELTA|default(printer["gcode_macro CHAMBER_VARS"].delta_temp)|int %}
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{% set h = params.HEATER_MAX|default(printer["gcode_macro CHAMBER_VARS"].max_heater_temp)|int %}
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{% set w = params.CHAMBER_AWAIT_TEMP|default(printer["gcode_macro CHAMBER_VARS"].start_offset)|int %}
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{% if w > 0 %}
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# If w is greater than 0, use M191 with wait for minimum temperature
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M191 S{s} D{d} H{h} W{s - w}
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{% else %}
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# Otherwise use M141 without waiting
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M141 S{s} D{d} H{h}
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{% endif %}
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[gcode_macro iHEATER_OFF]
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gcode:
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SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=chamber_target VALUE=0
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# SET_GCODE_VARIABLE MACRO=CHAMBER_VARS VARIABLE=start_offset VALUE=0
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UPDATE_DELAYED_GCODE ID=_iHEATER_CONTROL DURATION=1
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RESPOND prefix="iHeater_off" msg="Heating disabled."
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[gcode_macro iHEATER_CONTROL]
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gcode:
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# Target chamber temperature
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{% set target_chamber_temp = printer["gcode_macro CHAMBER_VARS"].chamber_target|float %}
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# Delta - how much the heater temp exceeds chamber temp
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{% set delta_temp = printer["gcode_macro CHAMBER_VARS"].delta_temp|float %}
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# Minimum heater temperature
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{% set min_heater_temp = printer["gcode_macro CHAMBER_VARS"].min_heater_temp|float %}
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# Maximum heater temperature
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{% set max_heater_temp = printer["gcode_macro CHAMBER_VARS"].max_heater_temp|float %}
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# Current heater temperature
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{% set heater_temp = printer["heater_generic iHeater_H"].temperature|float %}
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# Current chamber air temperature (from sensor)
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{% set chamber_temp = printer["temperature_sensor iHeater_S"].temperature|float %}
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# Control function call interval
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{% set control_interval = printer["gcode_macro CHAMBER_VARS"].control_interval|float %}
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# Minimum difference between desired and current chamber temperature
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{% set air_min_delta = printer["gcode_macro CHAMBER_VARS"].air_min_delta|float %}
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# Maximum difference between desired and current chamber temperature
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{% set air_max_delta = printer["gcode_macro CHAMBER_VARS"].air_max_delta|float %}
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# Variable to set target heater temperature
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{% set target_heater_temp = 0.0 %}
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# RESPOND prefix="iHeater_control" msg="Heater control..."
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{% if target_chamber_temp > 0 %}
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# Heating is active
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{% set temp_diff = target_chamber_temp - chamber_temp %}
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# MapToRange
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{% set value = temp_diff %}
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{% set inputLowerBound = air_min_delta %}
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{% set inputUpperBound = air_max_delta %}
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{% set outputLowerBound = delta_temp %}
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{% set outputUpperBound = [delta_temp, max_heater_temp - target_chamber_temp]|max %}
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{% set slope = (outputUpperBound - outputLowerBound) / (inputUpperBound - inputLowerBound) %}
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{% set clamped = ([inputLowerBound, value, inputUpperBound]|sort)[1] %}
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{% set adjustment = outputLowerBound + slope * (clamped - inputLowerBound) %}
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{% set target_heater_temp = (target_chamber_temp + adjustment)|round(2) %}
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{% elif heater_temp > min_heater_temp %}
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# Heating is off, but heater hasn't cooled down yet
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RESPOND prefix="iHeater_control" msg="Cooling down the heater..."
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{% else %}
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# Heater cooled down - end macro
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RESPOND prefix="iHeater_control" msg="Heater cooldown complete."
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{% set control_interval = 0.0 %}
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{% endif %}
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SET_HEATER_TEMPERATURE HEATER=iHeater_H TARGET={target_heater_temp}
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UPDATE_DELAYED_GCODE ID=_iHEATER_CONTROL DURATION={control_interval}
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[delayed_gcode _iHEATER_CONTROL]
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gcode:
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iHEATER_CONTROL
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