Re: home/limit switches - combined

["Joel Jacobs" <jj-at-spyparts.com>]

Thanks Matt for the reply,  I will just move the switches to the limit
inputs then.  Will I have to separate the Z switch - they are all in series
now - since the Z switch is at the + limit and the X and Y switches are at
the - limit.
  Also, I will go and verify that the soft limits are moving and check g92
also - I'll let you know what I find.

Joel

----- Original Message -----
From: Matt Shaver <mshaver-at-erols.com>
To: Multiple recipients of list <emc-at-nist.gov>
Sent: Tuesday, February 27, 2001 6:10 PM
Subject: Re: home/limit switches - combined


>
> Joel Jacobs wrote:
>
>
> > Since the software limits aren't terribly useful - they don't stay
relative
> > to machine zero,  would it be possible to wire one switch to both the
home
> > input and a limit input?
>
> If the software limits don't stay relative to machine zero, then that's
> a bug that needs to be fixed. You might try G92, rather than G10L2Pn, as
> a workaround until this can be fixed.
>
> > I understand EMC only looks at the home input
> > while homing and ignores it thereafter.  What I don't know is does EMC
> > ignore the limit switches while homing?  I would think it would have to
to
> > combine these functions.  Anyone tried this?
>
> Actually, during a homing cycle the axis will home against the first
> switch it hits (limit switch OR home switch), this is to allow for
> systems that don't have home switches. I've used this setup on a
> Bridgeport since they only have one switch for each of the X and Y axes.
>
> Matt
>
>