Re: [CAD_CAM_EDM_DRO] I forgot

Gene wrote:

> I have been reading the posts about home switches and have some
> questions. I have put limit switches on all axis but never thought about
> home switches. Do you absolutely need them? I thought, probably wrongly,
> that you could position the stage at the proper place in relation to the
> part and then designate the 0 position with software.

The reason for home switches is that you can leave the fixture on
the machine and shut down the CNC computer. When you start up
the computer the next day, you do the home routine, and the fixture
is aligned to the coordinates just as the day before. So, you don't
have to get out the edge finders, co-ax indicators, gage blocks
and tissue paper, etc. If you never leave a setup on the machine
or never make a part over several days, it is not needed. I don't
have home switches on mine, but I intend to add them, as I DO
sometimes want to retrieve the exact coordinate offset the next day.

Jon