Quote Originally Posted by John S View Post
How big's that Aztec calender ?
About 150mm.

Here's my attempt with the same G-code:

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That was with 1:1 ratio and 10mm pitch screws...

http://www.youtube.com/watch?v=Gh2pjXQY5U8

Wish I could afford to use the 20mm aluminium waiting on my router bed to make a 740mm one!