From: Larry Sayre 
To: Nils Olof Carlin 
CC: ATM 
Reply-To: Larry Sayre 


Nils Olof Carlin wrote:

>Larry,
>
>what I did was let it do a standard 18 pt cell (error  5.23 nm RMS);
>let forces on the inner ring vary: 3.44 nm
>then add another ring of 18 points and repeat;
>it gave a RMS error of 1.33nm for fixed forces;
>then let the rel force vary on the two inner rings,
>this lowered to 1.04nm:
>
>diameter 762
>thickness 40
>focal-length 3048
>n-mesh-rings 20
>rel-support-radii 0.253032 0.537123 0.819881
>rel-force 0.610218 0.637556 1
>num-support 6 12 18
>support-angle 0 15 0
>basis-ring-size 6
>basis-ring-min 0
>obstruction-diam 127
>optimize rel-support-radii 0 0.01
>optimize rel-support-radii 1 0.01
>optimize rel-support-radii 2 0.01
>optimize rel-force 0 0.01
>optimize rel-force 1 0.01
>part triangle 6 point 0 0 point 1 0 point 1 11
>part bar 3 part 0 0 part 0 1
>
>HTH
>
>Nils Olof
>
>
>
Nils;

This result is excellent, but linking the 18 outer points (which are
indepnendent in your example) will take some effort.

Thanks,
Lawrence Sayre

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as his noblest activity, and reason as his only absolute.

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