> I'm at a point with my six inch mirror that I've just about removed
> all the pits left over from the larger grits ( I'm currently using
> #240). However, I have a distinct bubble in the center of the
> mirror while grinding.
>
> I suspect that I should get rid of this bubble before moving on to the
> next smaller grit. I was going to continue with the present grit using
> normal 1/3 center over center stroke and alternating the mirror and
> tool on top until the bubble is gone. Any advice ?
>
> Thanks,
> Gary Lowell
> glowell@sgi.com
Gary,
You will sometimes see a bit of a bubble in the center at the beginning of a wet. As the grit spreads out and distributes itself more evenly, the bubble should dissappear. If you still have a bubble at the end of the wet, then you are not in full contact yet. Spend a little more time with the tool on top and shorten the strokes a just a bit. Otherwise - just keep going... you'll get there. ________________________________________________
Greg Granville - N3SPE - (day)814-865-3310 ARL-PSU gag1@psu.edu (eve)814-339-7244