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55 lines
2.3 KiB
Python
55 lines
2.3 KiB
Python
# Support a fan for cooling the MCU whenever a stepper or heater is on
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#
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# Copyright (C) 2019 Nils Friedchen <nils.friedchen@googlemail.com>
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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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from . import fan
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PIN_MIN_TIME = 0.100
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class ControllerFan:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.printer.register_event_handler("klippy:ready", self.handle_ready)
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self.stepper_names = []
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self.stepper_enable = self.printer.load_object(config, 'stepper_enable')
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self.printer.load_object(config, 'heaters')
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self.heaters = []
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self.fan = fan.Fan(config)
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self.fan_speed = config.getfloat('fan_speed', default=1.,
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minval=0., maxval=1.)
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self.idle_speed = config.getfloat(
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'idle_speed', default=self.fan_speed, minval=0., maxval=1.)
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self.idle_timeout = config.getint("idle_timeout", default=30, minval=0)
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self.heater_name = config.get("heater", "extruder")
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self.last_on = self.idle_timeout
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def handle_ready(self):
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pheaters = self.printer.lookup_object('heaters')
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self.heaters = [pheaters.lookup_heater(n.strip())
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for n in self.heater_name.split(',')]
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kin = self.printer.lookup_object('toolhead').get_kinematics()
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self.stepper_names = [s.get_name() for s in kin.get_steppers()]
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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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active = False
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for name in self.stepper_names:
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active |= self.stepper_enable.lookup_enable(name).is_motor_enabled()
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for heater in self.heaters:
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_, target_temp = heater.get_temp(eventtime)
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if target_temp:
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active = True
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if active:
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self.last_on = 0
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power = self.fan_speed
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elif self.last_on < self.idle_timeout:
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power = self.idle_speed
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self.last_on += 1
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print_time = self.fan.get_mcu().estimated_print_time(eventtime)
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self.fan.set_speed(print_time + PIN_MIN_TIME, power)
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return eventtime + 1.
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def load_config_prefix(config):
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return ControllerFan(config)
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