K8200/3Drag Auto Bed Leveling with 8mm Proximity Switch
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Mount for 8mm bed level sensor.
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Correct bed leveling is essential for good prints - Marlin firmware now has this awesome feature of measuring the bed and automatically adjusting the Z axis when printing.
As this YouTube video demonstrates.
I had a small used 8mm inductive proximity sensor (IA08BSN40PC) from an earlier project. It is compact, but I think, expensive from new...
The sensor will detect detect a metal bed (not glass, etc.) from approximately 3mm. It must be supplied with 6 - 36V and has an output just below the supply voltage.
Output must be converted to 3 - 5V before connected to the controller. This is done with two resistors and one zener diode as shown on the picture (before protected with shrink tube).
There are a lot of good guides to setup the firmware and activate the auto bed leveling feature. Tom's Guide has a good video explaining the setup.
>> If you like it, please leave a like, rating or a tip... :)
Instructions
Except for the sensor and electronics no extra mechanical parts are needed. Use the existing two M3 screws already in the extruder to mount the the printed part.
For Marlin firmware setup, search the web as there are a lot of good guides out there...
Print Settings
- 0.20mm layer height, 15% infill
- 2 perimeters, 3 top and 2 bottom layers
- No support needed