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    Re: Postscript code for making Bygrave Scales
    From: Marcelo S
    Date: 2014 Mar 31, 11:47 -0300

    I understand that all the Hewlett-Packard printers supports
    postscript, including the new ones.
    2014-03-29 12:56 GMT-03:00, Robin Stuart :
    > Off and on over the past few years I have been developing Postscript code to
    > produce Bygrave line of position slide rule scales. An earlier version of
    > the code was posted previously
    > http://fer3.com/arc/m2.aspx/Bygrave-Stuart-apr-2011-g16126 and was used to
    > produce Bygrave reproductions
    > http://fer3.com/arc/m2.aspx/MHR1-reproduction-Hasper-mar-2011-g16033
    > http://fer3.com/arc/m2.aspx/MHR1-reproduction-Morris-apr-2011-g16115 In
    > those versions the rules for the scale ticks were programmed in the
    > Postscript code itself. It became clear that there is enough variability and
    > idiosyncrasies between the original Bygrave, the H�henrechenschieber MHR1
    > and modern incarnation in the form of flat Bygraves that this approach is
    > not workable. Instead the new Postscript code I have written requires that
    > the characteristics of each and every tick on the scale be specified either
    > by reading the data from an external file or embedding it in the Postscript
    > code itself. The required data can be easily generated by a high level
    > computer language or perhaps a spreadsheet. Embedding the scale data in the
    > Postscript creates a self-contained file that could be sent directly to a
    > Postscript printer if such things still exist. For development and tweaking
    > I find it faster and more convenient to read the data from an external file.
    > This works fine on my Windows XP computer but so far I haven't been able to
    > get it to work under Windows 8.1. Something to do with access permissions I
    > guess. Any suggestions?
    > I attach a document explaining how to run the code, some examples of the
    > output that is possible and a zip file containing the code needed to produce
    > them.
    > I believe that the code could be used to produce a practical modern Bygrave
    > for actual sight reductions. This would probably require plastic tubes to be
    > ground to precise diameters but to date I have not located a facility to do
    > this. I appears to be relatively straightforward to produce the end caps,
    > locking knobs and other fittings by 3D printing.
    > Robin Stuart
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    > Attached File: http://fer3.com/arc/imgx/BygraveScales.pdf
    > Attached File: http://fer3.com/arc/imgx/BygraveAltFlat.pdf
    > Attached File: http://fer3.com/arc/imgx/BygraveFlat.pdf
    > Attached File: http://fer3.com/arc/imgx/BygraveMHR1.pdf
    > Attached File: http://fer3.com/arc/imgx/BygraveMkIIA.pdf
    > Attached File: http://fer3.com/arc/imgx/Stuart-BygraveFiles.zip
    > View and reply to this message: http://fer3.com/arc/m2.aspx?i=127398

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