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fan: Enable heater_fan objects on an MCU shutdown event 

Should the MCU go into an error state, set the heater_fan to
max_power.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-10-12 11:31:12 -04:00
parent 3c4d14bfa9
commit 3506d1e994
2 changed files with 11 additions and 2 deletions
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7
config/example-extras.cfg
View File

@ -29,7 +29,8 @@
# Heater cooling fans (one may define any number of sections with a
# "heater_fan" prefix). A "heater fan" is a fan that will be enabled
# whenever its associated heater is active.
# whenever its associated heater is active. In the event of an MCU
# software error the heater_fan will be set to its max_power.
#[heater_fan my_nozzle_fan]
# See the "fan" section for fan configuration parameters.
#pin: ar4
@ -40,6 +41,10 @@
#heater_temp: 50.0
# A temperature (in Celsius) that the heater must drop below before
# the fan is disabled. The default is 50 Celsius.
#fan_speed:
# The fan speed (expressed as a value from 0.0 to 1.0) that the fan
# will be set to when its associated heater is enabled. The default
# is max_power.
# Additional micro-controllers (one may define any number of sections

6
klippy/fan.py
View File

@ -39,6 +39,10 @@ class PrinterHeaterFan:
heater = config.get("heater", "extruder0")
self.heater = extruder.get_printer_heater(printer, heater)
self.heater_temp = config.getfloat("heater_temp", 50.0)
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_shutdown_value(max_power)
printer.reactor.register_timer(self.callback, printer.reactor.NOW)
def callback(self, eventtime):
current_temp, target_temp = self.heater.get_temp(eventtime)
@ -47,7 +51,7 @@ class PrinterHeaterFan:
return eventtime + 1.
power = 0.
if target_temp or current_temp > self.heater_temp:
power = 1.
power = self.fan_speed
print_time = self.mcu.estimated_print_time(eventtime) + FAN_MIN_TIME
self.fan.set_speed(print_time, power)
return eventtime + 1.