M12 Inductive Probe mount for Satsana 4020 Dual Remix

This is an M12 size inductive probe mount that fits in combination with @Elias_1320404 's Dual 4020 Satsana remix hot-end cooler for the Ender3 and Ender3Pro.

Also fits when using @Senkii_375738 ‘s Ender3 Direct Drive mod and clears @PraetorianCZ ’s QR Code Cover

Version 1:

- Requires a slightly longer screw for mounting (M3x8mm should suffice) - For M12 sized bed level probes - V1 is made for use with the original nuts from the probe, but not the washers. - Offset: -49mm / -9mm (against default Mk8 hot-end) Version 2:

- Requires a slightly longer screw for mounting (M3x8mm should suffice). - For M12 sized bed level probes. - Slightly narrower than V1 so the probe is closer to the nozzle. - V2 is made for use with an M3x4x4.2 threaded insert and a short M3 screw for fastening probe. - Possibly also usable with an M4 tap and an M4 bolt for fastening probe. Might not be as strong! - Offset: -43mm / -7mm (against default Mk8 hot-end)

Fits the popular inductive proximity sensors from the LJ12A3 series and other M12 sized probes.

I'm using the LJ12A3-4-Z/BX-5V NPN NO which runs on 5volts and should be far easier to connect than the 6-36v versions. (non -5V modelnumbers)

Warning: 5Volt probe requires a spring steel printbed! Also tested with a sheet of aluminium kitchen foil under a regular flexi magnetic bed. It seems to work for me, but your mileage may vary

To connect an 5volt LJ12A3 probe: I've connected positive of the probe (brown wire) to the 5V/VCC pin of the ICSP header on the v1.1.4 (Melzi 8bit) board for power, ground (blue wire) to the left pin of the Z-endstop and signal (black wire) to the right pin of the Z-endstop header. For this, I've used a single strand of a dupont flatcable for the positive and a 2pin JST-PH connector for signal and ground.

V1 Custom Probe offset in TH3D UF2 when using a stock Mk8 hot-end: #define NOZZLE_TO_PROBE_OFFSET { -49, -9, 0 }

V2 Custom Probe offset in TH3D UF2 when using a stock Mk8 hot-end: #define NOZZLE_TO_PROBE_OFFSET { -43, -7, 0 }

And since this is a NPN NO sensor, the switching logic should be inverted with this addition to the configuration.h of UF2: #define INVERT_EZABL_LOGIC