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Hein,
I did'nt have time to look at your scales until now.
They look very good! How do you create them?
Is it hard to adapt the program to different tube
diametres? Do you think it would be feasible to also
print a reverse numbering?

Wolfgang



Am Sonntag, 24. Januar 2010 19:08 schrieb Hein Bodahl:
> On 23.01.2010 06:56, Gary LaPook wrote:
> > You guys appear to be trying to achieve
> > perfection. The original Bygrave and my copy both
> > achieve the same level of accuracy, one or two
> > minutes of arc, even though my tube is only 1.5
> > inches in diameter. I just cut and tried different
> > percentage settings for my printer until I got a
> > reasonable fit and it works as well as the
> > original. It's not worth pulling your hair out to
> > try to get better accuracy.
>
> What hair I have left is hardly worth pulling out
> for any reason :) I am using my sextant in an
> armchair 100 miles from the nearest natural brine.
> This is a wonderful, educational hobby for me. As
> such, nitpicking time consumption is essential. If
> someone else also can benefit from it, all the
> better.
>
> After some consideration and testing, 50mm (2")
> seems to do the trick for me. 50mm  will keep the
> entire cot scale divided down to at least 1' on a
> 35cm (14") long tube. It may not be necessary but I
> think it looks good.
>
> I have attached the prototype scales, one continuous
> cos-cot for A3 sheets to save a little on tube
> length, and separate cot and cos scales for A4
> sheets in case somebody with an A4 printer wants to
> try.
>
> As some of the labels will be cut of on the right
> side I have extended the scales on the left side.
> They are intended to be cut vertically exactly where
> the scales start at the bottom (digitally if you
> want to overlap).
>
> Hein

   

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