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# Support fans that are enabled when a heater is on
#
# 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, extruder
PIN_MIN_TIME = 0.100
class PrinterHeaterFan:
def __init__(self, config):
self.printer = config.get_printer()
self.heater_name = config.get("heater", "extruder0")
self.heater_temp = config.getfloat("heater_temp", 50.0)
self.fan = fan.PrinterFan(config)
self.mcu = self.fan.mcu_fan.get_mcu()
max_power = self.fan.max_power
self.fan_speed = config.getfloat(
"fan_speed", max_power, minval=0., maxval=max_power)
self.fan.mcu_fan.setup_start_value(0., max_power)
def printer_state(self, state):
if state == 'ready':
self.heater = extruder.get_printer_heater(
self.printer, self.heater_name)
reactor = self.printer.get_reactor()
reactor.register_timer(self.callback, reactor.NOW)
def callback(self, eventtime):
current_temp, target_temp = self.heater.get_temp(eventtime)
power = 0.
if target_temp or current_temp > self.heater_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 load_config(config):
return PrinterHeaterFan(config)
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