diff options
Diffstat (limited to 'klippy/fan.py')
| -rw-r--r-- | klippy/fan.py | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/klippy/fan.py b/klippy/fan.py index 54cace6c..6a5766ef 100644 --- a/klippy/fan.py +++ b/klippy/fan.py @@ -1,9 +1,11 @@ # Printer fan support # -# Copyright (C) 2016 Kevin O'Connor <kevin@koconnor.net> +# Copyright (C) 2016,2017 Kevin O'Connor <kevin@koconnor.net> # # This file may be distributed under the terms of the GNU GPLv3 license. +import extruder + FAN_MIN_TIME = 0.1 PWM_CYCLE_TIME = 0.010 @@ -16,12 +18,10 @@ class PrinterFan: pin = config.get('pin') hard_pwm = config.getint('hard_pwm', 0) self.mcu_fan = printer.mcu.create_pwm(pin, PWM_CYCLE_TIME, hard_pwm, 0.) - # External commands - def set_speed(self, print_time, value): + def set_pwm(self, mcu_time, value): value = max(0., min(self.max_power, value)) if value == self.last_fan_value: return - mcu_time = self.mcu_fan.print_to_mcu_time(print_time) mcu_time = max(self.last_fan_time + FAN_MIN_TIME, mcu_time) if (value and value < self.max_power and not self.last_fan_value and self.kick_start_time): @@ -31,7 +31,34 @@ class PrinterFan: self.mcu_fan.set_pwm(mcu_time, value) self.last_fan_time = mcu_time self.last_fan_value = value + # External commands + def set_speed(self, print_time, value): + mcu_time = self.mcu_fan.print_to_mcu_time(print_time) + self.set_pwm(mcu_time, value) + +class PrinterHeaterFan: + def __init__(self, printer, config): + self.fan = PrinterFan(printer, config) + heater = config.get("heater", "extruder0") + self.heater = extruder.get_printer_heater(printer, heater) + if self.heater is None: + raise config.error("Unknown heater '%s'" % (heater,)) + self.heater_temp = config.getfloat("heater_temp", 50.0) + printer.reactor.register_timer(self.callback, printer.reactor.NOW) + def callback(self, eventtime): + current_temp, target_temp = self.heater.get_temp() + if not current_temp and not target_temp and not self.fan.last_fan_time: + # Printer still starting + return eventtime + 1. + power = 0. + if target_temp or current_temp > self.heater_temp: + power = 1. + mcu_time = self.fan.mcu_fan.system_to_mcu_time(eventtime + FAN_MIN_TIME) + self.fan.set_pwm(mcu_time, power) + return eventtime + 1. def add_printer_objects(printer, config): if config.has_section('fan'): printer.add_object('fan', PrinterFan(printer, config.getsection('fan'))) + for s in config.get_prefix_sections('heater_fan '): + printer.add_object(s.section, PrinterHeaterFan(printer, s)) |