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: Sub Diameter Tools

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Stephen Campbell on February 1, 2001 07:07:58 UTC

You can use a 6" tool!,and the convex curvature(prior to pouring the pitch lap) does'nt even have to match the curvature of the mirror,as long as the lap is making good contact,the pitch will conform to the mirror, as long as there isnt a great difference in r.c. mirror and tool f/5 and f/6.8 is close enough,now if the 10" tool was f/1 or f/10 there might be a problem,remember to press often ,you must maintain good contact,and this is very important:dont use too much overhang! if you turn down the edge its difficult to correct.
Use slow strokes and light pressure and dont let it dry out,use a spray bottle and run a humidifier if the humidity level is low.

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 1994-2024 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