diff options
Diffstat (limited to 'klippy/extras')
| -rw-r--r-- | klippy/extras/temperature_fan.py | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/klippy/extras/temperature_fan.py b/klippy/extras/temperature_fan.py new file mode 100644 index 00000000..2c3e0177 --- /dev/null +++ b/klippy/extras/temperature_fan.py @@ -0,0 +1,44 @@ +# Support fans that are enabled when temperature exceeds a set threshold +# +# Copyright (C) 2016-2018 Kevin O'Connor <kevin@koconnor.net> +# +# This file may be distributed under the terms of the GNU GPLv3 license. +import fan + +PIN_MIN_TIME = 0.100 +KELVIN_TO_CELCIUS = -273.15 + +class TemperatureFan: + def __init__(self, config): + self.name = config.get_name() + self.printer = config.get_printer() + self.fan = fan.PrinterFan(config) + self.mcu = self.fan.mcu_fan.get_mcu() + self.fan_speed = config.getfloat('fan_speed', 1., minval=0., maxval=1.) + min_temp = config.getfloat('min_temp', minval=KELVIN_TO_CELCIUS) + max_temp = config.getfloat('max_temp', above=min_temp) + self.temp = config.getfloat('temp', 40. if max_temp > 40. else max_temp, + minval=min_temp, maxval=max_temp) + self.fan.set_shutdown_speed(1.) + self.last_temp = KELVIN_TO_CELCIUS + self.sensor = self.printer.lookup_object('heater').setup_sensor(config) + self.sensor.setup_minmax(min_temp, max_temp) + self.sensor.setup_callback(self.temperature_callback) + def printer_state(self, state): + if state == 'ready': + reactor = self.printer.get_reactor() + reactor.register_timer(self.callback, reactor.NOW) + def callback(self, eventtime): + power = 0. + if self.last_temp > self.temp: + power = self.fan_speed + print_time = self.mcu.estimated_print_time(eventtime) + PIN_MIN_TIME + self.fan.set_speed(print_time, power) + return eventtime + 1. + def temperature_callback(self, read_time, temp): + self.last_temp = temp + def stats(self, eventtime): + return True, '%s: temp=%.1f' % (self.name, self.last_temp) + +def load_config_prefix(config): + return TemperatureFan(config) |