149 lines
6.3 KiB
Python
149 lines
6.3 KiB
Python
# Support for filament width sensor
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#
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# Copyright (C) 2019 Mustafa YILDIZ <mydiz@hotmail.com>
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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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ADC_REPORT_TIME = 0.500
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ADC_SAMPLE_TIME = 0.001
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ADC_SAMPLE_COUNT = 8
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MEASUREMENT_INTERVAL_MM = 10
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class FilamentWidthSensor:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.reactor = self.printer.get_reactor()
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self.pin = config.get('pin')
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self.nominal_filament_dia = config.getfloat(
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'default_nominal_filament_diameter', above=1.0)
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self.measurement_delay = config.getfloat('measurement_delay', above=0.)
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self.measurement_max_difference = config.getfloat('max_difference',
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above=0.)
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self.max_diameter = (self.nominal_filament_dia
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+ self.measurement_max_difference)
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self.min_diameter = (self.nominal_filament_dia
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- self.measurement_max_difference)
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self.is_active = True
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# filament array [position, filamentWidth]
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self.filament_array = []
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self.lastFilamentWidthReading = 0
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# printer objects
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self.toolhead = self.ppins = self.mcu_adc = None
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self.printer.register_event_handler("klippy:ready", self.handle_ready)
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# Start adc
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self.ppins = self.printer.lookup_object('pins')
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self.mcu_adc = self.ppins.setup_pin('adc', self.pin)
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self.mcu_adc.setup_minmax(ADC_SAMPLE_TIME, ADC_SAMPLE_COUNT)
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self.mcu_adc.setup_adc_callback(ADC_REPORT_TIME, self.adc_callback)
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# extrude factor updating
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self.extrude_factor_update_timer = self.reactor.register_timer(
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self.extrude_factor_update_event)
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# Register commands
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self.gcode = self.printer.lookup_object('gcode')
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self.gcode.register_command('QUERY_FILAMENT_WIDTH', self.cmd_M407)
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self.gcode.register_command('RESET_FILAMENT_WIDTH_SENSOR',
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self.cmd_ClearFilamentArray)
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self.gcode.register_command('DISABLE_FILAMENT_WIDTH_SENSOR',
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self.cmd_M406)
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self.gcode.register_command('ENABLE_FILAMENT_WIDTH_SENSOR',
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self.cmd_M405)
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# Initialization
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def handle_ready(self):
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# Load printer objects
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self.toolhead = self.printer.lookup_object('toolhead')
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# Start extrude factor update timer
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self.reactor.update_timer(self.extrude_factor_update_timer,
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self.reactor.NOW)
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def adc_callback(self, read_time, read_value):
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# read sensor value
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self.lastFilamentWidthReading = round(read_value * 5, 2)
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def update_filament_array(self, last_epos):
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# Fill array
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if len(self.filament_array) > 0:
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# Get last reading position in array & calculate next
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# reading position
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next_reading_position = (self.filament_array[-1][0]
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+ MEASUREMENT_INTERVAL_MM)
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if next_reading_position <= (last_epos + self.measurement_delay):
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self.filament_array.append([last_epos + self.measurement_delay,
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self.lastFilamentWidthReading])
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else:
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# add first item to array
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self.filament_array.append([self.measurement_delay + last_epos,
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self.lastFilamentWidthReading])
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def extrude_factor_update_event(self, eventtime):
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# Update extrude factor
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pos = self.toolhead.get_position()
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last_epos = pos[3]
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# Update filament array for lastFilamentWidthReading
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self.update_filament_array(last_epos)
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# Does filament exists
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if self.lastFilamentWidthReading > 0.5:
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if len(self.filament_array) > 0:
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# Get first position in filament array
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pending_position = self.filament_array[0][0]
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if pending_position <= last_epos:
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# Get first item in filament_array queue
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item = self.filament_array.pop(0)
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filament_width = item[1]
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if ((filament_width <= self.max_diameter)
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and (filament_width >= self.min_diameter)):
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percentage = round(self.nominal_filament_dia**2
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/ filament_width**2 * 100)
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self.gcode.run_script("M221 S" + str(percentage))
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else:
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self.gcode.run_script("M221 S100")
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else:
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self.gcode.run_script("M221 S100")
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self.filament_array = []
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return eventtime + 1
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def cmd_M407(self, params):
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response = ""
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if self.lastFilamentWidthReading > 0:
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response += ("Filament dia (measured mm): "
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+ str(self.lastFilamentWidthReading))
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else:
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response += "Filament NOT present"
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self.gcode.respond(response)
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def cmd_ClearFilamentArray(self, params):
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self.filament_array = []
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self.gcode.respond("Filament width measurements cleared!")
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# Set extrude multiplier to 100%
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self.gcode.run_script_from_command("M221 S100")
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def cmd_M405(self, params):
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response = "Filament width sensor Turned On"
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if self.is_active:
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response = "Filament width sensor is already On"
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else:
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self.is_active = True
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# Start extrude factor update timer
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self.reactor.update_timer(self.extrude_factor_update_timer,
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self.reactor.NOW)
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self.gcode.respond(response)
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def cmd_M406(self, params):
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response = "Filament width sensor Turned Off"
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if not self.is_active:
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response = "Filament width sensor is already Off"
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else:
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self.is_active = False
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# Stop extrude factor update timer
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self.reactor.update_timer(self.extrude_factor_update_timer,
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self.reactor.NEVER)
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# Clear filament array
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self.filament_array = []
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# Set extrude multiplier to 100%
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self.gcode.run_script_from_command("M221 S100")
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self.gcode.respond(response)
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def load_config(config):
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return FilamentWidthSensor(config)
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