Re: atm Final figuring with full size lap - minimizing effect

Bratislav Curcic (epabcc@epa.ericsson.se)
Thu, 3 Aug 95 08:49:25 EST

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Why don't you use a subdiameter lap ? Say, 2 inch plywood disc (for an 8" mirror) covered with soft pitch, scalloped at the edges is a very powerful tool. Go slow, with circular and elliptical strokes. Another advantage of the small tool is that is VERY slow in action. Radial elliptical strokes result in a tremendous smoothing action. See Ceravolo's article on "High finesse figuring" in old TM magazine (#35 or thereabouts).

Bratislav

Next message: John Q. Runchey: "Re: atm Re: use of wood for a telescope tube"
Previous message: David J. Lane: "Re: atm Attaching encoder to azimuth bearing"
Maybe in reply to: Mitch Berkson: "atm Final figuring with full size lap - minimizing effect"
Next in thread: Mitch Berkson: "atm Subdiameter pitch lap"