¶ Overview
https://www.pandapi3d.com/bdwidth
bdwidth sensor is an optical width(diameter) and motion sensor for 3D filament.
Just power it, then you can measure your filament motion&diameter.
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Flow rate adjust: adjust the flow rate in real time
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Jam/Runout sensor: Pause the printer while jam or runout (laser optical tracking chip)
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Width Accuracy: +/- 0.01mm (high resolution 0.005mm CCD sensor chip)
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Connection: USB or I2C, Low power 5V*49mA = 0.245W
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No calibration required
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firmware update from the usb (Only needs updating when we release a new bdwidth.hex)
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No mechanical contact with the filament, no wear due to the use of optical components
¶ Quick start
¶ 1.Connection
Plug the bdwidth sensor into the USB port or I2C port(it can be any two gpios) on the 3D printer mainboard
¶ 2.Install software module
cd ~
git clone https://github.com/markniu/bdwidth.git
chmod 777 ~/bdwidth/klipper/install.sh
~/bdwidth/klipper/install.sh
¶ 3.Configure Klipper
add the following section into your klipper config file,
here we connect the bdwidth to the usb port
[bdwidth]
port:usb
# usb or i2c
#i2c_software_scl_pin:PA8
#i2c_software_sda_pin:PA14
# needed if the port is i2c
serial:/dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
# needed if the port is usb
default_nominal_filament_diameter: 1.75 # (mm)
enable: all
# disable or enable the sensor after power on.
# the value should be one of width/motion/all/disable
# width(only enable the width function)
# motion(only enable the motion function)
# all(enable both the width and motion)
# disable(disable both the width and motion)
min_diameter: 1.0
# Minimal allowed diameter for flow rate adjust and runout.
max_diameter: 2.0
# Maximum allowed diameter for flow rate adjust and runout.
# The default is default_nominal_filament_diameter + max_difference.
extruder:extruder
runout_delay_length : 8.0
# (mm) increase this value if the print speed is high or with high flowrate
# else it may trigger the pause
flowrate_adjust_length : 5 # (mm)
pause_on_runout: True
sample_time:2
# in seconds
sensor_to_nozzle_length: 750
# The distance from sensor to the melting chamber/hot-end in
# millimeters (mm). The filament between the sensor and the hot-end
# will be treated as the default_nominal_filament_diameter. Host
# module works with FIFO logic. It keeps each sensor value and
# position in an array and POP them back in correct position. This
# parameter must be provided.
# how to measure:https://github.com/markniu/bdwidth/blob/main/doc/lengthToNozzle.jpg
logging: True
# Out diameter to terminal and klipper.log can be turn on|of by
# command.