Re: gEDA-user: Part Rotation in XY-data

["John Luciani" <jluciani@xxxxxxxxx>]

On Sun, Nov 9, 2008 at 9:47 AM, Bert Timmerman <bert.timmerman@xxxxxxxxx> wrote:
> Hi John, Duncan and all,

> Maybe this issue was on the list before, I can't remember :)
>
> Anyway, if we start to rotate elements with arbitrary angles
> (angle is !0, !90, !270, !360), output from pcb's XY-exporter is likely
> to give some serious problems with pick-and-place machines.
>
> Example:
>
> Pin #1 is at the Mark = 0,0
> Pin #2 is somewhere in the upper left quadrant
> Rotate the element 0.5 degrees around pin #1
>
> 0.0 degrees != 0.5 degrees --> Jackpot !!

You need three points to determine the angle.
Pin1 (P1) is the center. Pin2 (P2) in the original position.
And Pin2 (P2') in the rotated position. There is 0.5degrees
between  P1-P2 and P1-P2'.

0 degrees only occurs if P2 == P2'

(* jcl *)


>
> Just my EUR 0.02
>
> Kind regards,
>
> Bert Timmerman.
>
>
>
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>



-- 
http://www.luciani.org


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