Re: [CAD_CAM_EDM_DRO] Profile finishing-suggestions?

Hi David:
The way it is dealt with in toolrooms, is a combination of 4 strategies:
1) small small stepovers. Often 0.002 or less for a 1/4 ball.
2) waterline profiling on near vertical surfaces, x parallel, y parallel,
radial or flowline toolpaths on more horizontal surfaces
3) biggest ballcutter you can crowd into the features.
4) handwork to finish.

Dressing a profile on a rubberized abrasive wheel is not difficult, but it
is difficult to do accurately.
I have had best success shaping them with a bench grinder.
Stick them in a Dremel or Foredom, and run them gently against the grinding
wheel while both spindles are running.
WEAR YOUR SAFETY SHADES!!!!!!!!
Wit a radius gage, and a good light source, it is amazing how accurate you
can get, but it takes patience, and it will stink up the shop.

Cheers

Marcus


-----Original Message-----
From: David M. Munro <munro@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Saturday, June 09, 2001 6:43 AM
Subject: [CAD_CAM_EDM_DRO] Profile finishing-suggestions?

>I am currently cutting a big radius with a smaller radius ball mill. I
>am getting a certain amount of stepping on the curve, as would be
>expected:
>
>http://www.arcadianclock.com/curve.jpg
>
>I need to finish this to a smooth straight grained surface, like a
>Scotch Brite wheel produces. I've thought of mounting such a wheel on
>the machine spindle, and dressing it to a larger radius and making the
>cuts again with that. How do I dress a Scotch Brite wheel to a radius?
>Does a dressing diamond do it? A carbide tool bit?
>
>This must be a fairly common situation in CNC shops that mill profiles
>with ball mills. Is there a standard procedure for finishing profiles?
>
>
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