mirror of https://github.com/Desuuuu/klipper.git
temperature_fan: Add support for temperature-triggered fan.
Signed-off-by: Michael Barbour <barbour.michael.0@gmail.com>
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@ -211,6 +211,37 @@
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# is 1.0
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# Temperature-triggered cooling fans (one may define any number of
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# sections with a "temperature_fan" prefix). A "temperature fan" is
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# a fan that will be enabled whenever its associated sensor is above
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# a set temperature. In the event of an MCU software error the
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# temperature_fan will be set to its max_power.
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#[temperature_fan my_temp_fan]
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# See the "fan" section for fan configuration parameters.
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#pin: ar4
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# See the "heater" section for details about the sensor_type and
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# sensor_pin parameters.
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#sensor_type: EPCOS 100K B57560G104F
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#sensor_pin: analog13
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# The remaining variables are specific to temperature_fan.
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#min_temp: 0
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#max_temp: 100
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# The maximum range of valid temperatures (in Celsius) that the
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# sensor must remain within. This controls a safety feature
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# implemented in the micro-controller code - should the measured
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# temperature ever fall outside this range then the micro-controller
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# will go into a shutdown state. Set this range just wide enough so
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# that reasonable temperatures do not result in an error. These
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# parameters must be provided.
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#temp: 40.0
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# A temperature (in Celsius) that the sensor must exceed before the
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# fan is enabled. The default is 40 Celsius.
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#fan_speed: 1.0
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# The fan speed (expressed as a value from 0.0 to 1.0) that the fan
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# will be set to when the sensor temperature exceeds the set value.
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# The default is 1.0.
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# Additional micro-controllers (one may define any number of sections
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# with an "mcu" prefix). Additional micro-controllers introduce
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# additional pins that may be configured as heaters, steppers, fans,
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@ -0,0 +1,44 @@
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# Support fans that are enabled when temperature exceeds a set threshold
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#
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# Copyright (C) 2016-2018 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import fan
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PIN_MIN_TIME = 0.100
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KELVIN_TO_CELCIUS = -273.15
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class TemperatureFan:
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def __init__(self, config):
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self.name = config.get_name()
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self.printer = config.get_printer()
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self.fan = fan.PrinterFan(config)
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self.mcu = self.fan.mcu_fan.get_mcu()
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self.fan_speed = config.getfloat('fan_speed', 1., minval=0., maxval=1.)
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min_temp = config.getfloat('min_temp', minval=KELVIN_TO_CELCIUS)
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max_temp = config.getfloat('max_temp', above=min_temp)
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self.temp = config.getfloat('temp', 40. if max_temp > 40. else max_temp,
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minval=min_temp, maxval=max_temp)
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self.fan.set_shutdown_speed(1.)
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self.last_temp = KELVIN_TO_CELCIUS
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self.sensor = self.printer.lookup_object('heater').setup_sensor(config)
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self.sensor.setup_minmax(min_temp, max_temp)
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self.sensor.setup_callback(self.temperature_callback)
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def printer_state(self, state):
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if state == 'ready':
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reactor = self.printer.get_reactor()
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reactor.register_timer(self.callback, reactor.NOW)
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def callback(self, eventtime):
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power = 0.
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if self.last_temp > self.temp:
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power = self.fan_speed
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print_time = self.mcu.estimated_print_time(eventtime) + PIN_MIN_TIME
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self.fan.set_speed(print_time, power)
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return eventtime + 1.
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def temperature_callback(self, read_time, temp):
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self.last_temp = temp
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def stats(self, eventtime):
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return True, '%s: temp=%.1f' % (self.name, self.last_temp)
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def load_config_prefix(config):
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return TemperatureFan(config)
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@ -206,13 +206,7 @@ class PrinterHeaters:
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if heater_name in self.heaters:
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raise config.error("Heater %s already registered" % (heater_name,))
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# Setup sensor
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self.printer.try_load_module(config, "thermistor")
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self.printer.try_load_module(config, "adc_temperature")
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sensor_type = config.get('sensor_type')
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if sensor_type not in self.sensors:
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raise self.printer.config_error("Unknown temperature sensor '%s'" % (
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sensor_type,))
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sensor = self.sensors[sensor_type](config)
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sensor = self.setup_sensor(config)
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# Create heater
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self.heaters[heater_name] = heater = Heater(config, sensor)
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return heater
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@ -223,6 +217,14 @@ class PrinterHeaters:
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raise self.printer.config_error(
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"Unknown heater '%s'" % (heater_name,))
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return self.heaters[heater_name]
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def setup_sensor(self, config):
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self.printer.try_load_module(config, "thermistor")
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self.printer.try_load_module(config, "adc_temperature")
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sensor_type = config.get('sensor_type')
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if sensor_type not in self.sensors:
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raise self.printer.config_error("Unknown temperature sensor '%s'" % (
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sensor_type,))
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return self.sensors[sensor_type](config)
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def add_printer_objects(printer, config):
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printer.add_object('heater', PrinterHeaters(printer, config))
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