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For questions about the BLTouch automatic leveling sensor for 3D Printers.

BLTouch is an auto leveling sensor for 3D Printers that can precisely measure the tilt of the bed surface. It works with any kinds of bed materials, such as glass, wood, metal, etc.

From BLTouch :: Auto Bed Leveling Sensor for 3D Printers

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.