Inductive Sensor
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Introduction
Inductive sensors are used to sense the Z height on 3D printers. For Marlin with RAMPS - use one that has a 5V output, as opposed to 12V, as RAMPS cannot handle 12V without using additional components.
Part numbers look like LJ18A3-8-Z/BY-5V.
- 5V is the critical part - 5V output
- LJ18 - the 18 refers to the diameter of the sensor in mm
- -8- refers to the distance of sensing
- Z/BY refers to normally open vs normally closed
- NPN vs PNP - [1]
- See D3D BOM for sourcing.
- See D3D Height Controller for design