35 lines
1.4 KiB
Python
35 lines
1.4 KiB
Python
# Support fans that are enabled when a heater is on
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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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class PrinterHeaterFan:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.heater_name = config.get("heater", "extruder0")
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self.heater_temp = config.getfloat("heater_temp", 50.0)
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self.fan = fan.PrinterFan(config, default_shutdown_speed=1.)
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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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def printer_state(self, state):
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if state == 'ready':
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pheater = self.printer.lookup_object('heater')
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self.heater = pheater.lookup_heater(self.heater_name)
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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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current_temp, target_temp = self.heater.get_temp(eventtime)
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power = 0.
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if target_temp or current_temp > self.heater_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 load_config_prefix(config):
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return PrinterHeaterFan(config)
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