Hall effect proximity sensors

[Voicecoil]

I was just asking for general advice rather than for a specific device - but likely something like the NJK-5001C

[the great waldo]

I was just asking for general advice rather than for a specific device - but likely something like the NJK-5001C

Hi Voicecoil
I'm not sure if you checked your original post but you wrote "I'm thinking of using these for homing sensors" however "these" didn`t refer to anything, so a sensible reply would have been difficult. Maybe this was just a typo ?
Cheers
Andrew

[Voicecoil]

Hi Voicecoil
I'm not sure if you checked your original post but you wrote "I'm thinking of using these for homing sensors" however "these" didn`t refer to anything, so a sensible reply would have been difficult. Maybe this was just a typo ?
Cheers
Andrew

"These" referred to the title of the thread.......

[the great waldo]

Ahh

Ok I got it.

Cheers
Andrew

[cropwell]

https://www.google.co.uk/url?sa=t&rc...DWNnAf7sglZ7fP

Page 64

But I personally would stick to Inductive sensors.

[magicniner]

2 inductive sensors in series on each axis, one sensing the linear position and one sensing a rotating tab or chopper on the ball screw or stepper would give you accurate, repeatable homing.

[Voicecoil]

2 inductive sensors in series on each axis, one sensing the linear position and one sensing a rotating tab or chopper on the ball screw or stepper would give you accurate, repeatable homing.

Having a rotating tab on the ballscrew is a good idea - essentially magnifies the resolution - I'll see if there's room to incorporate it.

[cropwell]

2 inductive sensors in series on each axis, one sensing the linear position and one sensing a rotating tab or chopper on the ball screw or stepper would give you accurate, repeatable homing.

I presume these would have to be the Normally Open types. I think it is over the top for woodwork, but probably OK for watchmaking.

[johnsattuk]

2 inductive sensors in series on each axis, one sensing the linear position and one sensing a rotating tab or chopper on the ball screw or stepper would give you accurate, repeatable homing.

Generally I don't use N/O types for limit switches, they dont cover broken connections. Could use two N/C in parallel