I have designed an inductive sensor bracket and LED hood for my gMax 1.5 XT. I don’t have a single extruder assembly so I could only create an inductive sensor bracket for the dual extrusion assembly. Auto bed leveling is a complete game changer for your 3-D printer. While I have not found a set it and forget it nirvana of 3-D printing; auto bed leveling brings it pretty darn close. Enjoy!!!!
This bracket and LED hood are extremely easy to install and print. No supports are required and no additional screws are necessary. I am using E3D V6 hot ends however the bracket should work with the stock Reprap hot ends.
Inductive sensor used:
LJ18A3-8-Z/BX-G 3-Wire DC 6-36V 200mA NPN NO 8mm Inductive Proximity Switch
The sensor is great because it allows for an 8 mm proximity which gives you plenty of room between the sensor and your extrusion nozzles. Available through Amazon prime too!!
Here’s a great video on how to set up auto bed trimming (auto bed leveling) with an inductive sensor using marlin firmware.
To help accelerate your firmware modifications I am including my probe offset from extruder defines below. You should be able to use the X and Y values however your Z offset will have to determine yourself.
NOTE: The build bed that comes with a stock gMax printer is acrylic and will not react to the inductive sensor. This does not mean you cannot use an inductive sensor with the acrylic bed. All you have to do is lay down aluminum tape in the areas that are probed for auto bed leveling. You can cover the aluminum tape with painters tape to use the entire bed with whatever material you would like to print.
Uses existing screws from hotend mounting point on motor bracket
Bracket now screwed into place.
with e3d nozzles the sits best around 30mm from the bottom of the backet
Stock LED hood wont accommodate the sensor - This one does
The 'g' and 'a' Tho!