Re: Fine Centering Scope

I bought the one from Enco many years ago and use it often. The stated accuracy is 0.0001, but is more like 0.001. But I still find it useful where edge finders, wigglers, and the like are useless. I do cast injection molds which might need some machining or changes after casting. With the scope I can alien the mill spindle with an edge of a small cavity or the tangent of a hole. Using contact devises could easily damage the mold and most features would be too small to use an edge finder anyway. I do have 3 axis DRO to help position the cutter. I use collets for the scope and cutter. The run out of the collet also effects the accuracy. Using the scope effectively will require a lot of time and practice, and twisting your head around to see through the eye piece is frustrating. There are much more accurate scopes available but they are also 10 times the price. If you are only trying to locate over a mark on the workpiece, setting up the scope will take a lot longer than the other methods.
--
Billy Hiebert
HIEBERT SCULPTURE WORKS
Small Part Injection Molding
http://www.hieberts.com

Joseph Gwinn wrote:
I've seen an optical tool intended for centering the spindle of a mill over a crosshair or mark on a workpiece, one that doesn't require such good vision as many do not have.

Enco has it as item 240-0404 for $170: <http://www.use-enco.com/CGI/INSRIT?PMAKA=240-0404>.

MSC has what appears to be the same thing, with more description and a higher price: <http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=1758752&PMT4NO=25857782>. The long description is in the printed catalog, not the website.

Travers also has it as item 57-101-650, for $237! Well, they used to - it no longer appears on their website. In the 2007 paper catalog, it appears on page 805 as a TTC Fine Centering Scope. But it probably didn't sell well.

I did find this thread from 2006: <http://www.cnczone.com/forums/archive/index.php/t-26230.html>.

And this one <http://www.artsoftcontrols.com/forum/index.php?topic=1563.10>.

And this user's website (about halfway down): <http://homepage2.nifty.com/modelicengine/c05062.htm>.


In any event, even at $170 it's kind of expensive for what it does, and I wonder if anybody has any experience with it or anything like it. Also, does anyone know the actual make and model? It seems to start with SKO.


Thanks,

Joe Gwinn

.

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