mirror of https://github.com/Desuuuu/klipper.git
40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
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# Printer cooling fan
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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 pins
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FAN_MIN_TIME = 0.1
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PWM_CYCLE_TIME = 0.010
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class PrinterFan:
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def __init__(self, config):
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self.last_fan_value = 0.
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self.last_fan_time = 0.
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self.max_power = config.getfloat('max_power', 1., above=0., maxval=1.)
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self.kick_start_time = config.getfloat('kick_start_time', 0.1, minval=0.)
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printer = config.get_printer()
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self.mcu_fan = pins.setup_pin(printer, 'pwm', config.get('pin'))
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self.mcu_fan.setup_max_duration(0.)
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self.mcu_fan.setup_cycle_time(PWM_CYCLE_TIME)
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self.mcu_fan.setup_hard_pwm(config.getint('hard_pwm', 0))
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def set_speed(self, print_time, value):
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value = max(0., min(self.max_power, value))
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if value == self.last_fan_value:
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return
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print_time = max(self.last_fan_time + FAN_MIN_TIME, print_time)
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if (value and value < self.max_power
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and not self.last_fan_value and self.kick_start_time):
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# Run fan at full speed for specified kick_start_time
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self.mcu_fan.set_pwm(print_time, self.max_power)
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print_time += self.kick_start_time
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self.mcu_fan.set_pwm(print_time, value)
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self.last_fan_time = print_time
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self.last_fan_value = value
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def load_config(config):
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if config.get_name() != 'fan':
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raise config.error("Invalid print cooling fan config name")
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return PrinterFan(config)
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