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fan: Support setting a max_power attribute for the print cooling fan

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-07-04 11:38:44 -04:00
parent 09140a51d5
commit 5793271308
2 changed files with 11 additions and 3 deletions
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7
klippy/fan.py
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@ -11,21 +11,22 @@ class PrinterFan:
def __init__(self, printer, config):
self.last_fan_value = 0.
self.last_fan_time = 0.
self.max_power = config.getfloat('max_power', 1., above=0., maxval=1.)
self.kick_start_time = config.getfloat('kick_start_time', 0.1, minval=0.)
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):
value = max(0., min(1., 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 < 1.
if (value and value < self.max_power
and not self.last_fan_value and self.kick_start_time):
# Run fan at full speed for specified kick_start_time
self.mcu_fan.set_pwm(mcu_time, 1.)
self.mcu_fan.set_pwm(mcu_time, self.max_power)
mcu_time += self.kick_start_time
self.mcu_fan.set_pwm(mcu_time, value)
self.last_fan_time = mcu_time