# Support for filament width sensor # # Copyright (C) 2019 Mustafa YILDIZ # # This file may be distributed under the terms of the GNU GPLv3 license. import filament_switch_sensor ADC_REPORT_TIME = 0.500 ADC_SAMPLE_TIME = 0.03 ADC_SAMPLE_COUNT = 15 class HallFilamentWidthSensor: def __init__(self, config): self.printer = config.get_printer() self.reactor = self.printer.get_reactor() self.pin1 = config.get('adc1') self.pin2 = config.get('adc2') self.dia1=config.getfloat('Cal_dia1', 1.5) self.dia2=config.getfloat('Cal_dia2', 2.0) self.rawdia1=config.getint('Raw_dia1', 9500) self.rawdia2=config.getint('Raw_dia2', 10500) self.MEASUREMENT_INTERVAL_MM=config.getint('measurement_interval',10) self.nominal_filament_dia = config.getfloat( 'default_nominal_filament_diameter', above=1) self.measurement_delay = config.getfloat('measurement_delay', above=0.) self.measurement_max_difference = config.getfloat('max_difference', 0.2) self.max_diameter = (self.nominal_filament_dia + self.measurement_max_difference) self.min_diameter = (self.nominal_filament_dia - self.measurement_max_difference) self.diameter =self.nominal_filament_dia self.is_active =config.getboolean('enable', False) self.runout_dia=config.getfloat('min_diameter', 1.0) # Use the current diameter instead of nominal while the first measurement isn't in place self.use_current_dia_while_delay = config.getboolean('use_current_dia_while_delay', False) # filament array [position, filamentWidth] self.filament_array = [] self.lastFilamentWidthReading = 0 # printer objects self.toolhead = self.ppins = self.mcu_adc = None self.printer.register_event_handler("klippy:ready", self.handle_ready) # Start adc self.ppins = self.printer.lookup_object('pins') self.mcu_adc = self.ppins.setup_pin('adc', self.pin1) self.mcu_adc.setup_minmax(ADC_SAMPLE_TIME, ADC_SAMPLE_COUNT) self.mcu_adc.setup_adc_callback(ADC_REPORT_TIME, self.adc_callback) self.mcu_adc2 = self.ppins.setup_pin('adc', self.pin2) self.mcu_adc2.setup_minmax(ADC_SAMPLE_TIME, ADC_SAMPLE_COUNT) self.mcu_adc2.setup_adc_callback(ADC_REPORT_TIME, self.adc2_callback) # extrude factor updating self.extrude_factor_update_timer = self.reactor.register_timer( self.extrude_factor_update_event) # Register commands self.gcode = self.printer.lookup_object('gcode') self.gcode.register_command('QUERY_FILAMENT_WIDTH', self.cmd_M407) self.gcode.register_command('RESET_FILAMENT_WIDTH_SENSOR', self.cmd_ClearFilamentArray) self.gcode.register_command('DISABLE_FILAMENT_WIDTH_SENSOR', self.cmd_M406) self.gcode.register_command('ENABLE_FILAMENT_WIDTH_SENSOR', self.cmd_M405) self.gcode.register_command('QUERY_RAW_FILAMENT_WIDTH', self.cmd_Get_Raw_Values) self.runout_helper = filament_switch_sensor.RunoutHelper(config) # Initialization def handle_ready(self): # Load printer objects self.toolhead = self.printer.lookup_object('toolhead') # Start extrude factor update timer self.reactor.update_timer(self.extrude_factor_update_timer, self.reactor.NOW) def adc_callback(self, read_time, read_value): # read sensor value self.lastFilamentWidthReading = round(read_value * 10000) def adc2_callback(self, read_time, read_value): # read sensor value self.lastFilamentWidthReading2 = round(read_value * 10000) # calculate diameter diameter_new = round((self.dia2 - self.dia1)/ (self.rawdia2-self.rawdia1)* ((self.lastFilamentWidthReading+self.lastFilamentWidthReading2) -self.rawdia1)+self.dia1,2) self.diameter=(5.0 * self.diameter + diameter_new)/6 def update_filament_array(self, last_epos): # Fill array if len(self.filament_array) > 0: # Get last reading position in array & calculate next # reading position next_reading_position = (self.filament_array[-1][0] + self.MEASUREMENT_INTERVAL_MM) if next_reading_position <= (last_epos + self.measurement_delay): self.filament_array.append([last_epos + self.measurement_delay, self.diameter]) else: # add first item to array self.filament_array.append([self.measurement_delay + last_epos, self.diameter]) def extrude_factor_update_event(self, eventtime): # Update extrude factor pos = self.toolhead.get_position() last_epos = pos[3] # Update filament array for lastFilamentWidthReading self.update_filament_array(last_epos) # Check runout self.runout_helper.note_filament_present( self.diameter > self.runout_dia) # Does filament exists if self.lastFilamentWidthReading > 0.5: if len(self.filament_array) > 0: # Get first position in filament array pending_position = self.filament_array[0][0] if pending_position <= last_epos: # Get first item in filament_array queue item = self.filament_array.pop(0) filament_width = item[1] elif self.use_current_dia_while_delay: filament_width = self.diameter else: filament_width = self.nominal_filament_dia if ((filament_width <= self.max_diameter) and (filament_width >= self.min_diameter)): percentage = round(self.nominal_filament_dia**2 / filament_width**2 * 100) self.gcode.run_script("M221 S" + str(percentage)) else: self.gcode.run_script("M221 S100") else: self.gcode.run_script("M221 S100") self.filament_array = [] return eventtime + 1 def cmd_M407(self, gcmd): response = "" if self.lastFilamentWidthReading > 0: response += ("Filament dia (measured mm): " + str(self.diameter)) else: response += "Filament NOT present" gcmd.respond_info(response) def cmd_ClearFilamentArray(self, gcmd): self.filament_array = [] gcmd.respond_info("Filament width measurements cleared!") # Set extrude multiplier to 100% self.gcode.run_script_from_command("M221 S100") def cmd_M405(self, gcmd): response = "Filament width sensor Turned On" if self.is_active: response = "Filament width sensor is already On" else: self.is_active = True # Start extrude factor update timer self.reactor.update_timer(self.extrude_factor_update_timer, self.reactor.NOW) gcmd.respond_info(response) def cmd_M406(self, gcmd): response = "Filament width sensor Turned Off" if not self.is_active: response = "Filament width sensor is already Off" else: self.is_active = False # Stop extrude factor update timer self.reactor.update_timer(self.extrude_factor_update_timer, self.reactor.NEVER) # Clear filament array self.filament_array = [] # Set extrude multiplier to 100% self.gcode.run_script_from_command("M221 S100") gcmd.respond_info(response) def cmd_Get_Raw_Values(self, gcmd): response = "ADC1=" response += (" "+str(self.lastFilamentWidthReading)) response += (" ADC2="+str(self.lastFilamentWidthReading2)) response += (" RAW="+ str(self.lastFilamentWidthReading +self.lastFilamentWidthReading2)) gcmd.respond_info(response) def get_status(self, eventtime): return {'Diameter': self.diameter, 'Raw':(self.lastFilamentWidthReading+ self.lastFilamentWidthReading2), 'is_active':self.is_active} def load_config(config): return HallFilamentWidthSensor(config)