Auto-leveling via BL-Touch, 3D touch, Inductive Probe, Physical Microswitch or Optical Endstop

 According to ALL3DP, “BL-Touch is equivalent to a microswitch mounted on a servo arm controlled by a servo motor. When the tool head lowers to home the nozzle in the Z-axis, the pushpin triggers the hall sensor, at which point the pushpin retracts and the tool head raises.” It works in such an automatic way that BL-Touch can gather and collect information all the way long during printing, and then adjust the print bed in time.


According to 3D experts’ expereince and data, BL-Touch’s Standard Deviation in repeatability is around 0.005mm.

In addition the BL-Touch device makes it easier to set the printer bed ready without wasting time fiddling with the bed and Z-axis height. Even though you are not a machinist, bed leveling is not a hassle either.

Anyway, BL-Touch is very much like a shining star on the top of the Christmas tree. If it is equipped on your 3D printer, more fine results will come out, the quality first layer of the prints, the high precision and etc. Enjoying DIY fun and enhancing mechanical skills can be obtained without it.

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