Re: [CAD_CAM_EDM_DRO] limit switches: mech vs proximity

In a message dated 11/19/2000 10:39:00 PM Hawaiian Standard Time,
jmw@... writes:

> . Maybe a
> prox sw could be mounted on a spring mechanism to protect it?
>
> Voice of experience?
>
> Thanks very much.
>
> --Jack W.
>
>
>

Jack,

You first need to define if you are setting up a home switch or a limit
switch. A limit could be spring mounted as it need not define a precise
location. It simply prevents the machine from "jumping the tracks". A home
sensor should be set up rigidly to have any repeatability. I know large
industrial limit switches such as Omrons or Honeywells can be accurate to
with in .001 or .002". This makes for a decent home even when not combined
with an index pulse. IMO

Peter
THRD, Inc.


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