On 05/08/2018 10:04 PM, Gene Heskett wrote:
On Tuesday 08 May 2018 22:19:25 Jon Elson wrote:
On 05/08/2018 06:57 PM, John Dammeyer wrote:
I had a brake disk surface ground so it can be laid on the mill
table and a dial indicator swept around without jamming into the
T-Slots. For the work I've done to date it's been adequate. It
fits on my surface plate so I could scrape it even flatter and maybe
someday it will move up to project #42.
I have a program that generates a full circular arc, and
then goes to the center of the arc.
So, I can mill a path around the circle, then swap the end
mill for a dial test indicator, and sweep the
circle. So, I can tram the head to the actual X-Y plane of
motion, not just the surface of the table.
And, in fact, due to wear, I get a little bit of a saddle
shape there. But, you can set the tram to
get the best average of the X-X and Y-Y deviations.
Jon
And that, Jon, is the best idea yet. I assume you can adjust the diameter
so as to re-use the milled plate again for the next time?
Yes, either change diameter or just cut the ring a little
deeper each time.
Jon
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