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Re: Re: Re: Sub Diameter Tools

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Posted by Rick Crockett on February 6, 2001 05:32:16 UTC

Hi Walter.

Remember the China Lake group?

I prefer pitch on the harder side. If it is too hard though, sleaks and scratching are easier to occur. Certainly use nylon mesh material to put small channels into the pitch as you do not want a long hard stretch of pitch to allow the polishing compounds to roll along. If a particle cannot bury into the pitch, you want it to be carried off in the channels. I prefer TOT with a 2/3 diameter tool but really any size can be made to work by adjusting your stroke and testing often. I strongly recommend making and using a dall null testor for paraboloids. That will enable you to quickly see what your strokes are doing. Yes you can trim the pitch and the ATM volumes discuss sizes, shapes and strokes.

Good Luck,

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