This is the pattern I'm talking about:
Now, the simplest but most time consuming way would be to just draw the holes in sketcher, probably in multiple sketches to keep the elements per sketch to a manageable number, but this would be just a copy. I'd rather learn how to build the pattern myself to change the parameters.
Some observations:
Holes of the same size always form a circle around the center of the pattern.
The number of holes per circle is always the same, which means you only need to sketch one "real" hole per circle and can use the circular pattern to fill in the rest.
The the size of every circle of holes changes by the same amount (i.e. circle 1 is 50mm, circle 2 is 55mm, circle 3 is 60mm and so on).
This may be wrong, but it seems like the distances of four holes in a diamond shaped pattern are always identical:
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o
/ \
o o
\ /
o
Now, all of these observations are not enough to sketch the pattern as it is. I haven't figured out how to align the holes to form the guillauché style pattern and also how to determine the size of the holes relative to each other.
Maybe some of you want to weight in?