RE: [ATM] Petal Laps, Star Laps,Starfish and other deformed creatures...

[Don Bates <dbates59@yahoo.com>]

Jerry:

You confirmed what I was thinking. A fast mirror would
benefit more from a modified lap. The actual quote by
M.Texerau on page 95 is: "The merit of the full,
unimpaired tool, in perfect working condition, is not
a thing to sacrifice lightly". 
Sounds good to me.

Don


--- Jerry <wa4guu@verizon.net> wrote:

> Right on Grasshopper! 
> 
> The f6.6 should be easy (relative) to figure with a
> normal lap.
> 
> Now if you have much time and pitch you could try
> various methods and learn
> the pros and cons of stars and other alternative
> laps. But a shorter f ratio
> might be better for that. And when you see the
> difference in smoothness that
> you get with a full size normal lap on the f6.6
> compared to what you get
> with the others you will only want an abnormal lap
> when you need one.
> 
> Jerry
> 
> 
> -----Original Message-----
> From: Don Bates
> 
> Since I am about to parabolize my 10" f6.6 plate, I
> was wondering if anyone had any thoughts about using
> so called "Star Laps". Many threads seem to extol
> the
> virtues of a star pattern to keep the edges from
> lagging behind the center. However, like a young
> student of Kung Fu, I keep hearing my master
> Texerau's
> warning, "Do not take lightly the condition of a
> perfectly mated lap, and deform it without a good
> reason, grasshopper". 
> Is it really a good idea to jump out of a perfectly
> good airplane and deform the lap that I have so
> carefully cared for? Will I reach Parabola Nirvana
> or
> Hyperbola Hell? 
> 
> Don
> 
> 
> 



		
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