Re: [CAD_CAM_EDM_DRO] Wigglers and Tricks

Joe,

An optical center punch? is this to align the spindle or to punch the
intersection of scribed lines? I started to think there was a
"periscope" type device that chucked up in the collet, and "peered" down
at the work, giving some sort of alignment gradicule. I wonder if
something like that would be practical? I have a "bomb site" for an old
HP 7475, etc. plotter; if one could add a mirror at 45deg., and mount
the whole thing, it might be useful.

Maybe the ball end wigglers find the center of a drilled/bored hole? I
finally saw/read up on the "tophat" (?) centerfinder in Rudy's
tapes/books (I can't remember which).

I saw OMW's "Center Test Wobbler" (for lathe) at the P.R.I.M.E. show,
but at $30 plus shipping, I thought I might make one, when I need it. I
still wonder if the long needle is bent a little, will it still be
accurate? I examined one on the table, and it didn't seem to be true.
Maybe it doesn't matter?

Alan

Joe Vicars wrote:

>
> You can make your own wiggler with a peice of chewing gum or clay
> and a small steel needle (like from a wood moisture meter). Stick the
> clay on the end of the endmill you are getting ready to cut with and
> stick the needle in the clay then use like a regular wiggler. Find your
> center then take the clay off and start cutting. Make sure the needle
> is small so if it flies out it won't matter. But it won't fly out.
> Obviously not the most accurate or desirable method.
> Another must have item is an Optical Center Punch. It is the best
> fifty bucks I ever spent and it is the closest you will ever get using
> scribe lines and punches.
> The only remaining trick with the wiggler is finding the center of
> an already made hole. I would like someone to tell me how this is done.
>