Interface board for heated bed sensors — BambuLab X1/P1 series (BML-26300)

Interface board for heated bed sensors — BambuLab X1/P1 series (BML-26300) is an electronic adapter designed to connect temperature and related sensors from a heated print bed to the mainboard of BambuLab X1 and P1 series 3D printers. It performs signal conditioning and provides stable electrical connections to ensure the printer receives accurate temperature data from the bed, which is essential for consistent first-layer adhesion and controlled print processes. The board is intended for use when replacing a faulty sensor assembly, carrying out repairs, or performing upgrades that require a dedicated interface between the heated bed sensors and the printer electronics.

Advantages

The interface board offers reliable signal conditioning to reduce noise and preserve accurate temperature readings from the heated bed. Its connector layout matches BambuLab X1 and P1 series wiring schemes, simplifying installation and minimizing the need for soldering or custom wiring. By restoring correct sensor communication with the printer mainboard, the board helps maintain stable temperature control during printing cycles and supports consistent print quality.

Suitable for

• Replacing a damaged or malfunctioning heated bed sensor interface on BambuLab X1 and P1 series printers
• Repairing printers after bed sensor failures or intermittent temperature readings
• Upgrading or refurbishing heated bed assemblies where a dedicated interface board is required
• Service technicians and advanced users performing maintenance or diagnostics on bed temperature circuits

Key specifications

• Compatibility: BambuLab X1 and P1 series heated bed sensor systems
• Function: signal conditioning and connector interface for bed temperature sensors
• Electrical: designed for low-voltage sensor signals used in printer bed thermistors/thermocouples (match original printer wiring)
• Connectors: board-mounted connectors matching original bed-to-mainboard cabling for plug-and-play replacement
• Form factor: compact PCB sized to fit the bed assembly area of supported printers

How to use

Power down the printer and disconnect it from mains before starting. Remove access panels to reach the heated bed wiring, unplug the original sensor connector(s) from the mainboard, and detach the bed-side connector if applicable. Mount the interface board in the designated position on the bed assembly or in the cable path using the existing mounting points or non-conductive fasteners. Connect the bed sensor leads to the board and then connect the board’s output connector to the printer mainboard, ensuring secure, correct orientation of all connectors. Reassemble panels and restore power, then verify proper temperature readings in the printer firmware or control software before starting a print.

Usage recommendations

Use only when compatible with BambuLab X1 and P1 series beds; confirm connector types and wiring orientation before installation. Handle the board by its edges to avoid static damage and ensure connectors are fully seated. After installation, run a temperature calibration or test to confirm stable readings and correct behavior under normal printing temperatures.