Proximity sensor

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Description

The modulated proximity sensor and loom consists of an infra-red emitter and detector and the four wire loom to connect it to the controller PCB.

The proximity sensor is attached to the X carriage and it works by bouncing infra-red light off the surface of the print bed. The intensity of the reflection gives the distance the surface is from the device. Over a range of a few millimetres it is accurate to approximately 10 microns. The detector will also pick up any other infra-red radiation in the environment so the device works differentially: the reading with the emitter turned off is subtracted from the reading with the emitter turned on to eliminate environmental IR interference.

For further details see the proximity sensor Github repository here. There are details including the PCB layout, which includes the dimensions of the device.

Updating Ormerod 1 kits with RRP 4-wire modulated proximity probe are discussed on the forum here.

Additional information

Wiring loom

Included, Not included

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