Re: [CAD_CAM_EDM_DRO] Home / Limit switches

Carlos,

On cnc routers, limit switches at the low ends of the X and Y and the high
end of the Z are recommended.

Most of the time, I just use a G91 command to set my 0,0,0 point wherever I
wan it.

On most systems when you do the home, it then knows where the boundary's
limits are even when you do a G91.

Bob Campbell

----- Original Message -----
From: Carlos Guillermo <carlos@...>
To: CAD_CAM_EDM_DRO <CAD_CAM_EDM_DRO@egroups.com>
Sent: Thursday, January 25, 2001 9:48 AM
Subject: [CAD_CAM_EDM_DRO] Home / Limit switches


> List -
>
> The current discussion on g-code and coordinate systems has me
> wondering about what switches are really needed on the machine
> axes. The typical setup sounds like 2 limit switches and a home
> switch per axis. Why is the home switch necessary? Can't you
> just reference one of the limit switches and add ½ travel to get
> to the center? That shouldn't even be needed if you're going to
> just go and set your part origin somewhere else (so it seems).
>
> Does anybody out there omit the home switch?
>
> Carlos Guillermo
> VERVE Engineering & Design
>
>
>
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