I’m building an direct extruder with a single fan for hotend and motor cooling, I found that it is not possible to use heater_temp: in printer.cfg when using stepper:extruder and heater:extruder at the same time, only the parameter idle_time: was then possible, so I have changed controller_fan.py a litle bit so we can use heater_temp: and idle_timeout: for stepper and heater if the temperature goes under the defined value, it would be nice if the changes apear in the next update.
from . import fan
PIN_MIN_TIME = 0.100
class ControllerFan:
def __init__(self, config):
self.printer = config.get_printer()
self.printer.register_event_handler("klippy:ready", self.handle_ready)
self.printer.register_event_handler("klippy:connect",
self.handle_connect)
self.stepper_names = config.getlist("stepper", None)
self.stepper_enable = self.printer.load_object(config, 'stepper_enable')
self.printer.load_object(config, 'heaters')
self.heaters = []
self.fan = fan.Fan(config)
self.fan_speed = config.getfloat('fan_speed', default=1.,
minval=0., maxval=1.)
self.idle_speed = config.getfloat(
'idle_speed', default=self.fan_speed, minval=0., maxval=1.)
self.idle_timeout = config.getint("idle_timeout", default=30, minval=0)
self.heater_names = config.getlist("heater", ("extruder",))
self.heater_temp = config.getfloat("heater_temp", 50.0)
self.last_on = self.idle_timeout
self.last_speed = 0.
def handle_connect(self):
# Heater lookup
pheaters = self.printer.lookup_object('heaters')
self.heaters = [pheaters.lookup_heater(n) for n in self.heater_names]
# Stepper lookup
all_steppers = self.stepper_enable.get_steppers()
if self.stepper_names is None:
self.stepper_names = all_steppers
return
if not all(x in all_steppers for x in self.stepper_names):
raise self.printer.config_error(
"One or more of these steppers are unknown: "
"%s (valid steppers are: %s)"
% (self.stepper_names, ", ".join(all_steppers)))
def handle_ready(self):
reactor = self.printer.get_reactor()
reactor.register_timer(self.callback, reactor.monotonic()+PIN_MIN_TIME)
def get_status(self, eventtime):
return self.fan.get_status(eventtime)
def callback(self, eventtime):
speed = 0.
active = False
for name in self.stepper_names:
active |= self.stepper_enable.lookup_enable(name).is_motor_enabled()
for heater in self.heaters:
current_temp, target_temp = heater.get_temp(eventtime)
if target_temp or current_temp > self.heater_temp:
active = True
if active:
self.last_on = 0
speed = self.fan_speed
elif self.last_on < self.idle_timeout:
speed = self.idle_speed
self.last_on += 1
if speed != self.last_speed:
self.last_speed = speed
curtime = self.printer.get_reactor().monotonic()
print_time = self.fan.get_mcu().estimated_print_time(curtime)
self.fan.set_speed(print_time + PIN_MIN_TIME, speed)
return eventtime + 1.
def load_config_prefix(config):
return ControllerFan(config)