Take the hassle out of manual bed leveling with a smart sensor upgrade.

What Is a BLTouch or CR-Touch?

A BLTouch and CR-Touch are both auto bed leveling sensors that help your 3D printer automatically detect the height of your bed at various points. They eliminate the need for manual paper leveling and improve first layer consistency.

BLTouch: Uses a retractable physical pin and works on many printers.

CR-Touch: Creality's version, uses a metal probe and is more durable.

Why Use One?

Better First Layers

Less Frequent Manual Adjustments

Compensates for Uneven Beds

Saves Time in the Long Run

What You'll Need

A 3D printer that supports BLTouch or CR-Touch

The BLTouch or CR-Touch kit (usually includes sensor, wires, and mount)

Basic tools (screwdriver, hex wrench)

Firmware update from Creality (or custom like Marlin)

USB cable or SD card for firmware upload

Installation Steps

Mount the Sensor

Attach the sensor to the designated place on the hotend carriage using the provided bracket.

Ensure it's securely fastened and doesn't interfere with the nozzle.

Connect the Wires

Plug the wiring harness into the correct ports on your mainboard.

Typically 5-pin or 3+2-pin layout, depending on your printer.

Important: Turn off the printer before plugging in wires!

Update the Firmware

Download the correct firmware for your printer + sensor combo (from Creality's site or Marlin if custom).

Flash the firmware using an SD card or USB cable.

Once complete, reboot the printer.

Configure Z-Offset

Home the printer, then slowly lower the nozzle until it lightly touches a piece of paper.

Set this distance as your Z-offset.

Save the setting (usually through the LCD menu or G-code: M851, M500).

Run the Bed Leveling

Use the menu to start "Auto Bed Leveling" or G29 via terminal.

The sensor will probe multiple points and store the bed mesh.

Tips for Success

Double-check wiring - reversed wires may damage the sensor.

Always re-check Z-offset after a nozzle or bed change.

Save your mesh data after probing (M500 saves settings).

Run mesh leveling regularly if you frequently move your printer.

Conclusion

Installing a BLTouch or CR-Touch is one of the best upgrades for consistent, hassle-free 3D printing. With auto bed leveling, you'll waste less time on calibration and get better first layers-especially helpful if you're printing frequently or using large build plates.