Clock Builder Script

UPDATES:

Current development version to be found on git hub here:
github.com/syvwlch/Printable-Clock-Project

v2 - 2011 05 08
Now uses a club-tooth escapement rather than a ratchet-wheel Graham.
Backwards compatible with existing clock scripts.

v3 - 2011 05 13
Modified to make use of the new library feature for adding holes to the drum. Backwards compatible with existing clock scripts.
Summary of changes to the code:
https://github.com/syvwlch/Printable-Clock-Project/commit/d9a7dec80f6a474103868612170651c668f812d3

v4 - 2011 05 18
Modified to support the ratcheting drum designed by rustedrobot.
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There are things that get re-used by various clocks and test jigs, but don't really merit inclusion in the library itself. I got a little tired of managing multiple clock scripts, and having to make sure the latest improvements made it into the various configurations.

So, all this common logic, for pla