Re: [CAD_CAM_EDM_DRO] final finishing of steel bed

In a message dated 12/15/2004 6:13:45 AM Central Standard Time,
eexgs@... writes:

I would like to polish out the machining marks


Graham: Not that it would be THE fix for this quandary, but consider
"FINISHING" with super-sharp inserts. If you can't find "aluminum cutting" inserts
(specifically ground for that, which have super-sharp positive-rake edges),
try GRINDING the edge slightly on a 220 grit diamond wheel. If matching the
depth-of-cut of TWO is not straightforward, try cutting with only ONE.

Second: If you have a head-tilt adjustment, you might put some kind of
fixture in the collet much like a LONG-radius fly-cutter with a dial-gage on the
end of that, the plunger-tip registering the distance to the CLEAN
table-surface; swing it manually, observe the indication. Tap the adjustment with a
brass hammer, and swing and check left and right extremes again. Repeat as
necessary until reading is same on both. Be certain to REMOVE this
measuring-fixture before your turn on the quill!!!

Sometimes when you get it "as close as possible" but there is still a bit of
"poor overlap result", try FEEDING from the opposite direction. Sometimes
it matters which SIDE of the cutter hits the work-piece surface first.


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