Metric Hole Test Pattern
thingiverse
This is a metric hole test pattern designed for measuring detail and accuracy in printed materials. The 3mm thick flat piece features standard metric drill bit size holes, ranging from 1mm to 3mm in 0.1mm steps and from 3mm to 10mm in 0.1mm and 0.25mm steps. Hole arrangement requires minimal material, achieved through a physics simulation library. A cleaner key is available on the blog site, while the pattern can be found on Shapeways. If you're up for a challenge, try arranging circles to cover the smallest area while maintaining organization.
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