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extruder: Support a minimum extrude temperature

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Allow the config file to specify the minimum temperature for the
extruder and check for that temperature prior to moving the extruder
motor.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-09-30 19:04:24 -04:00
parent 3167e8ddbe
commit 9faa0fbd25
3 changed files with 14 additions and 1 deletions
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8
klippy/heater.py
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@ -28,6 +28,8 @@ class PrinterHeater:
self.mcu_pwm = self.mcu_adc = None
self.thermistor_c = Thermistors.get(config.get('thermistor_type'))
self.pullup_r = config.getfloat('pullup_resistor', 4700.)
self.min_extrude_temp = config.getfloat('min_extrude_temp', 170.)
self.can_extrude = False
self.lock = threading.Lock()
self.last_temp = 0.
self.last_temp_time = 0.
@ -49,6 +51,8 @@ class PrinterHeater:
control_algo = self.config.get('control', 'watermark')
algos = {'watermark': ControlBangBang, 'pid': ControlPID}
self.control = algos[control_algo](self, self.config)
if self.printer.mcu.output_file_mode:
self.can_extrude = True
def run(self):
self.mcu_adc.query_analog_in(REPORT_TIME)
def set_pwm(self, read_time, value):
@ -87,12 +91,16 @@ class PrinterHeater:
with self.lock:
self.last_temp = temp
self.last_temp_time = read_time
self.can_extrude = (self.last_temp >= self.min_extrude_temp
and self.target_temp >= self.min_extrude_temp)
self.control.adc_callback(read_time, temp)
#logging.debug("temp: %.3f %f = %f" % (read_time, read_value, temp))
# External commands
def set_temp(self, print_time, degrees):
with self.lock:
self.target_temp = degrees
if self.target_temp < self.min_extrude_temp:
self.can_extrude = False
def get_temp(self):
with self.lock:
return self.last_temp, self.target_temp