mirror of https://github.com/Desuuuu/klipper.git
extruder: Support a minimum extrude temperature
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>
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@ -135,6 +135,9 @@ pid_deriv_time: 2.0
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# will be smoothed to reduce the impact of measurement noise
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pid_integral_max: 255
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# The maximum "windup" the integral term may accumulate
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min_extrude_temp: 170
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# The minimum temperature (in Celsius) at which extruder move
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# commands may be issued
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min_temp: 0
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# Minimum temperature in Celsius (mcu will shutdown if not met)
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max_temp: 210
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@ -4,7 +4,7 @@
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import logging
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import stepper, heater
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import stepper, heater, homing
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class PrinterExtruder:
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def __init__(self, printer, config):
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@ -20,6 +20,8 @@ class PrinterExtruder:
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def motor_off(self, move_time):
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self.stepper.motor_enable(move_time, 0)
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def check_move(self, move):
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if not self.heater.can_extrude:
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raise homing.EndstopError(move.pos, "Extrude below minimum temp")
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if (not move.do_calc_junction
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and not move.axes_d[0] and not move.axes_d[1]
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and not move.axes_d[2]):
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@ -28,6 +28,8 @@ class PrinterHeater:
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self.mcu_pwm = self.mcu_adc = None
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self.thermistor_c = Thermistors.get(config.get('thermistor_type'))
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self.pullup_r = config.getfloat('pullup_resistor', 4700.)
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self.min_extrude_temp = config.getfloat('min_extrude_temp', 170.)
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self.can_extrude = False
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self.lock = threading.Lock()
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self.last_temp = 0.
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self.last_temp_time = 0.
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@ -49,6 +51,8 @@ class PrinterHeater:
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control_algo = self.config.get('control', 'watermark')
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algos = {'watermark': ControlBangBang, 'pid': ControlPID}
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self.control = algos[control_algo](self, self.config)
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if self.printer.mcu.output_file_mode:
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self.can_extrude = True
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def run(self):
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self.mcu_adc.query_analog_in(REPORT_TIME)
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def set_pwm(self, read_time, value):
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@ -87,12 +91,16 @@ class PrinterHeater:
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with self.lock:
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self.last_temp = temp
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self.last_temp_time = read_time
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self.can_extrude = (self.last_temp >= self.min_extrude_temp
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and self.target_temp >= self.min_extrude_temp)
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self.control.adc_callback(read_time, temp)
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#logging.debug("temp: %.3f %f = %f" % (read_time, read_value, temp))
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# External commands
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def set_temp(self, print_time, degrees):
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with self.lock:
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self.target_temp = degrees
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if self.target_temp < self.min_extrude_temp:
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self.can_extrude = False
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def get_temp(self):
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with self.lock:
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return self.last_temp, self.target_temp
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