[ATM] sharpie test

["c f" <quantemlp@hotmail.com>]

Hello to everybody,

I am grinding out 2 12" mirrors from the same tool.  I have gone through 80, 
120 and pretty much 220.  I decided to do a sharpie on both mirrors.  I 
found that using MOT, that the center lines vanished or ringed out to the 
edge.  The center started vanishing first within a couple of strokes,  by 50 
strokes, the lines had ringed out center to edge on both mirrors.  The 
stroke was the typical stroke but larger than 1/3 W stroke.  I plan on doing 
the sharpie again around 9 micron.  does this sound normal or should I stop 
here, back the bus up some and do a second sharpie using 1/3 W stroke, or 
just finish up with the 220.  These are 12" f5 mirrors at this point.

thanks everybody, and clear skys
charles


_______________________________________________
ATM mailing list http://www.atmlist.net/