The main function and control of this BL Touch clone is the same as most auto bed levelling sensors. Consisting of a small servo and a micro switch, the 3D Touch can be used on almost every 3D printer control board.
By using a progressively designed solenoid and hall sensor, the 3D Touch can integrate high precision in a simple structure. To make it more user-friendly, it includes smart functions such as self-test, false alarm, alarm release and test mode (for G-Code M119).