Beacon Eddy Current Surface Scanner and Contact Probe (Rev H)

Eddy current displacement sensor for homing and surface scanning in 3D printers. Works with Kalico and Klipper. Ships fully assembled and includes a USB cable. WARNING: Requires a conductive surface or substrate on the printer bed to work. Bed stacks that include oversized fixed magnets are not recommended and may not work with Beacon. BTT Pi and BTT Manta are known to cause damage to Beacon devices, and must be used with an inline hub or a different SBC. Eddy Current Surface Scanner for 3D Printers Native displacement output: no Z motion necessary for sensing Scan mode mesh: dense grid sampling in a matter of seconds Low thermal drift: minimized by design, with active compensation for everything else Rev H Rev H adds a high temperature rated accelerometer, so resonance testing and input shaping run from the probe with no ADXL to mount and remove, measuring up to 100C and surviving standby to 115C. The sensitivity and thermal drift figures in the table below are relative improvements rather than absolute measurements. Contact Mode Contact is one of two probing modes, alongside proximity, the non-contact scanning the probe is better known for. The nozzle physically touches the bed and the sensor detects the moment its own Z motion is interrupted, with no switch or moving parts. Either mode can be selected per command or set as the config default. Contact handles automatic Z offset and model calibration, and placed in a print start macro it recalibrates on every print, so nozzle and plate changes stop mattering. It is also immune to fixed magnets and to metallurgical variation in the plate, meaning beds that scan mode cannot read are often still workable. Full details are in the Beacon contact documentation. Printer Compatibility Firmware: Kalico and Klipper Connection: USB to single board computer Bed: conductive surface or substrate, 400um or thicker. Bare steel, WHAM BAM, PEI coated or laminated steel, and similar. Use with beds employing large or oversized fixed magnets is not recommended. Includes 1x Beacon board (main PCB, sensing PCB, headers, cable connector) 1x custom USB cable (6ft free, or 10.5ft for an additional fee) Variations Normal: best for Annex or StealthBurner printers Normal: main PCB and sensing PCB are assembled flat Low-Profile: best for VzBot, RatRig, or K3 Frostbite printers Low-Profile: main PCB and sensing PCB are assembled flat, as is the cable connector Warranty 30-day standard warranty, following the date of delivery Using a BTT Pi or BTT Manta board with the Beacon without an inline hub voids the warranty Additional Information Variation Normal, Low Profile Cable Length 6ft, 10.5ft Size 38mm x 27.5mm Form-Factor Planar Weight 3.3 grams Bandwidth 1kHz Resolution 0.5 um Temperature Rating 115C sensor, 115C amplifier Sensitivity +20% Thermal Drift -40% Coil Material Improved performance and durability Accelerometer Fully rated (100/120C) Probing Modes Proximity (scan) and contact Firmware Kalico and Klipper Device ID Enumerates as Beacon_RevH under /dev/serial/by-id/ Data Link USB (cable included) Input Protection Improved ESD and reverse polarity Bed Material Conductive surface or substrate, 400um or thicker. Bare steel, WHAM BAM, PEI coated or laminated steel, and similar.