BL Touch Auto Bed Leveling Sensor

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Summary

BLTouch is a type of semiconductor hall sensor and is an electronic component for 3D printers.

BLTouch is an auto leveling sensor for 3D Printers that can precisely measure the tilt of Bed surface. It could work with any kinds of bed materials, such as glasses, woods, metals, and so on.

Features

Main functions and controls of BLTouch are the same as usual auto bed leveling sensor, consists of RC servo and micro switch. Thus, BLTouch can be applied on almost every board.

BLTouch is fulfilled with simple structure and high precision by using progressively designed solenoid and hall sensor. It aims for user convenience and enjoyable printing by adding many smart functions, such as self-test, alarm, alarm release & Touch Switch mode, Blue LED for servo signal indicating and Z-probe(Zmin) Testing.

Smart

Self-test : The push pin operate two times in a test when the power is on.

Alarm : The AI will flash the LED indicator if a problem is detected during a self-test or operation.

Wiring defect indicator : Blue and Red LED for indicating wiring defects. 

High-precision

BLTouch’s Standard Deviation in repeatability is around 0.005mm, at that precise.

Technology

BLTouch consists of Atmel ATtiny13A or ATtiny2313A(V2.2 and later), solenoid, and a push pin.

Innovative Solenoid : Ultra Power Saving

On idle state, while the push-pin is whether pulled out or retracted, there are no any electric current flowing on solenoid. Standby electric current in the whole device is below average of 15mA on working state,

but while the pin is moving, in a sudden about 100ms, under 300mA flows in the device.

Low power consumption even drops joule heating, and it prevents heat problem.

Hall Sensor : Free Bed Selection

BLTouch does not uses either optical, nor proximity(inductive/capacitive) sensor.

BLTouch is controlled by hall effect, providing high precision. Thus the bed material can be freely selected.

Optimized structure : Larger Build Size

BLTouch is a small, and technology-intensive device. Build size can be set larger than other existing auto bed leveling sensor.

Easy to Use 

BLTouch uses existing RC Servo motor signal intactly, so just plug BLTouch on the same pins after removing servo motor.

Control by G-code