Inductive Sensor: Difference between revisions
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*-8- refers to the distance of sensing | *-8- refers to the distance of sensing | ||
*Z/BY refers to normally open vs normally closed | *Z/BY refers to normally open vs normally closed | ||
=Tom's Guide 1= | |||
*Mentions 12v sensor with voltage divider. Video description sources the 5V sensor | |||
<html><iframe width="560" height="315" src="https://www.youtube.com/embed/EcGFLwj0pnA" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe></html> | |||
=Samples= | =Samples= | ||
Revision as of 20:05, 6 June 2018
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 for the 2018 D3D with LCD screen - where we use the 8 mm distance sensing to facilitate the sensor not hitting the print bed.
- 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
Tom's Guide 1
- Mentions 12v sensor with voltage divider. Video description sources the 5V sensor
Samples
- From Aliexpress - 3 Wire Polarity: NPN Detection
- Voltage: DC 5V
- Detection Distance: 4mm
- Ouput Status: Normally Open
- Output current: 300mA
- Detection objects: Conductor
- Part number: LJ18A3-8-Z/BX
Notes
- NPN vs PNP - [1]
- See D3D BOM for sourcing.
- See D3D Height Controller for design