GEEETech Inductive Sensor Holder by Jahmez

Last crawled date: 3 years, 1 month ago

Just a remix without radial fan mount
Sensor:
LJ18A3-8-Z-BX-DC-6-36V-8mmhttp://www.ebay.com/itm/LJ18A3-8-Z-BX-DC-6-36V-8mm-Inductive-Proximity-Switch-Sensor-/351221468247?hash=item51c66e4c57:g:ZgEAAOSwUEVYDd7P
See photos for schematic. Here's a description in text. Also for coding see youtube video. IMPORTANT: Dont forget to add G29 to your slicer Gcode.
I am using the GT2560 Board (2 wire connteor to Z-min endstop). I removed the two connectors from my z-min endstop. The positive z-min goes to the black sensor wire via a 10k resitor. The negative goes directly to ground, in this case wired to -12V ground from the main power line.
The blue ground sensor wire goes to ground and is wired via 10K resitor to the positive z-min. This is essential to prevent 12v going into a 5v line.
The brown sensor wire goes directly to 12V+ connection going to the GT2560 which comes from the main power pack (IE take it from where you want as long as its 12V always on).
The Code I needed was a little different then what I remixed from.
If you follow this video he will explain the code. https://youtu.be/EcGFLwj0pnA
Update: The sensor has become unreliable, I am going to try replacing the sensor and see if that fixes the issue. I am getting inconsistent readings across the bed
Update 2:
I have switched to an aluminum bedplate and purchased the sensor shown in the youtube video, LJ12A3-4-Z/BX (bough here:http://www.ebay.com/itm/LJ12A3-4-Z-BX-Inductive-Proximity-Sensor-Switch-NPN-DC6-36V-3D-Printer-CNC-/261823325802?hash=item3cf5e2e66a:g:UCUAAOSwNSxVEZA5)
Also, you need to change this "#define min_software_endstops" to false if you want to be able to define a " #define Z_PROBE_OFFSET_FROM_EXTRUDER" with a negative number
I've uploaded a second file for the smaller 12mm diameter of this new sensor.