Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: sz8sc9 on June 28, 2007, 03:50:58 AM

Title: Inductive proximity switch
Post by: sz8sc9 on June 28, 2007, 03:50:58 AM

I have bought one on ebay, the idea is to test it as homing switch or tool lenght gauge. I see that operating voltage is 10-30V and the output will be the same minus a  drop of 1-2V.  So I'm looking for a diagram showing how to interface it to the home's pin or the input pin of the parallel port of the pc.
Any help will be much appreciated. Thank you.

Gianni

Title: Re: Inductive proximity switch
Post by: Chaoticone on June 28, 2007, 08:35:32 AM

Hey Gianni,
    I will work on a diagraham for you. You can't take the signal straight to the parallel port. I use prox switches and use them to operate solid state relays which send a 5v signal to the parallel port. Do you know if it is a PNP or NPN switch?

Brett

Title: Re: Inductive proximity switch
Post by: sz8sc9 on June 28, 2007, 09:25:30 AM

Brett,

Very kind of you. It's a npn, RS No 249-2451.

regards,
Gianni

Title: Re: Inductive proximity switch
Post by: Chaoticone on June 28, 2007, 11:45:04 AM

If you are using a NPN, you may not have to use the solid state relay but for safe measure, I'll assume you do. The way this is drawn, it has the + voltage for the prox. and the ss relay coming from the same source. Make sure this voltage is acceptable for both.

I hope it helps,
Brett

Title: Re: Inductive proximity switch
Post by: sz8sc9 on June 28, 2007, 12:19:37 PM

Brett,

Simple and effective, thank you.
I'll let you know how it works.

cheers,
Gianni