The LJ12A3-4-Z / BX remote sensor detects metals at a distance of 4mm. This makes it the perfect solution for the bed leveling of a heated bed. This can be used for example in marlin (software) as "car bedleveling (ABL)"
By using this function you do not have to adjust the bed by hand each time, but the software ensures that it remembers the different heights, measures the bed and compensates for the differences per corner in the software. In order to automatically enter the g code during printing.
The sensor detects metal at a precision of 4 mm. Should you have a glass bed? Then this is no problem. But just make sure that aluminum foil or tape is attached to make the detection possible. Please note that the detect distance is 4 mm. And that this has to go through the glass bed.
The sensor has a small red LED that will shine when the bed is 4mm near the sensor, this sensor has a thread M18 with which you can easily connect the sensor to your 3D printer or CNC machine.
This sensor operates at 6-36V, the signal voltage is the same as the input voltage so the signal will also be 6-36V. The sensor was tested at 5V without resistance and worked properly . When connected to 12V there must be a transistor.
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