Re: laser edge finder

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@...> wrote:

>
> Graham,
>
> Seems they use adjusting screws, but like you I can't be sure how
> many. Were I to make one, I'd use 6 or 8 set up in two sets of 3 or
> 4 and use "catspaw" lathe chuck methods to accomplish the task.
>
> This would be a foirly easy thing to make, but as previously
> mentioned by another; I worry about the size of the spot, and the
> resulting accuracy available.
>
> Ballendo
>

That's how they usually align small lasers and some big ones although
I don't know what "catspaw" chuck methods are. There just seemed to
be only one set of screws.

Spot size is an issue, you can certainly stop the beam down a little
but not a huger amount however if your beam is nice and round and say
1mm in diameter then you can put it into a decent 1mm hole and only
when centralized will you not see the beam on the edges of the hole.
Even so its hard to see how it can beat a wobbler which if you ensure
you give it time to react is as accurate as your DROs in my experience.

Graham