Re: [CAD_CAM_EDM_DRO] CNC mill home sensor question

Corey,

If the switch changes state as a small metal block gets near it, then it
most likely is a proximity sensor.

I am sure that someone who has a Denford will help.

Bob Campbell
Bob Campbell Designs
www.Campbelldesigns.com
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: "corey94945" <vandal968@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, October 30, 2005 8:57 PM
Subject: [CAD_CAM_EDM_DRO] CNC mill home sensor question


>I got a CNC mill on Monday that has a dead controller. It's a Denford
> Easimill 3 and I'm going to use a Campbell Combo breakout board and
> Mach3 to control it. I spent most of yesterday and today removing the
> bits that won't be re-used (computer, screen, relays, etc.) and
> figuring out the pinouts for everything that is being re-used (stepper
> controllers, limit switches, motors, etc.). I have a question about
> the switches that set the origin on each axis. This machine has the
> type that looks like a small spark-plug and registers when it
> appraoches a small steel block. They have two very small wires coming
> out of them.
>
> How do these switches work? Do they need a circuit to run them, or
> can they act like cherry switches with a conventional hookup? This is
> my first CNC project, I appreciate any help.
>
> cheers,
> c
>
>
>
>
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