choosing proximity sensors?

[driftspin]

Hello all.
I'm in the process of choosing proximity and homing switches. I have noticed that there are different sensing distance switches from 1 to 4 mm are there any benefits in choosing switches with a 1mm sensing distance (are they going to be more accurate for homing?) Any other information gratefuly accepted ie npn or pnp.
Cheers Andrew

Hi waldo,

I spend only €13,- on 5 units... m8 6-36 vdc 2mm sensing distance.

Aliexpress

lj8a3-2-z/bx npn

Just a single meter of wire on the sensor.

I use a sloped metal surface of about 20 deg for sensing.

I am very impressed by the accuracy.

homing is spot on on a cheap 0.01 mm tdi every time.

They switch to negative / ground on contact.Almost no resistance compared to grond.

In the off position they have about 10k series resistor in the switching wire

Had to do some tinkerring with resistors to interface with the cheap 5 axis Bob i have.

Not sure what your budget is for them or what controller electronics you have.

Grtz Bert.


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