Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Re: Re: Sub Diameter Tools

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
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,
-Rick

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins