Re: LIMIT SENSORS FOR MACHINE AXIS

Bob,
You missed one other possibility. Although I haven't used
them yet, I have a supply of Omron Photo-Electric Switches that would
work well as limit switches. They come with a blade that passes
between a yoke, to break the beam.

Marv Frankel
Los Angeles

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Robert Colin Campbell"
<bob@...> wrote:

>
> John,
>
> For limit switches there are basically two choices. One is a micro

switch

> and the other is a inductive proximity sensor.
>
> I like the inductive proximity sensor as they are normally easy to

install

> and are non contact. You should select the ones with 2 mm normal

sensing

> distance. I buy mine from www.Automationdirect.com
>
> Our breakout boards support either one.
>
> You will want a switch on both ends of the X and Y axis travel and

one at

> the top of the Z axis travel.
>
> In Mach one end will do double duty for the home and limit.
>
> Robert Colin Campbell
> Bob Campbell Designs
> www.Campbelldesigns.net
> Mach 2/3 breakout boards
> Relay boards
> Spindle Speed boards
> Stepper motors
> Plasma Torch Height control
>
> ----- Original Message -----
> From: "john_glynn57" <john_glynn57@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, March 26, 2008 12:03 PM
> Subject: [CAD_CAM_EDM_DRO] LIMIT SENSORS FOR MACHINE AXIS
>
>
> >I am building a router and am wondering what are the best type of
> > sensors to use for the ballscrew driven axes:
> > 1 referencing
> > 2. limit switches
> > 3. stop switch
> >
> > my problem is that there seems to be too much choice but im sure

that

> > there is a best option. Could anyone help me make a choice.
> >
> > John glynn
> >
> >
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