This gauge tests your 3D Printers ability to resolve small clearances between parts. It is a valuable tool for determining what you need to use in your designs to create moving parts without them fusing together. 

each arm features gaps from 0.15mm to 0.5mm with a center spinner at 0.4mm clearance. Clearances are between surfaces - for example the 0.5mm will have 1mm of play (assuming perfect tolerance, of course!) Use a flat head screwdriver to release stuck parts, if they will release at all. 

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Angus Deveson - Maker's Muse

3D Printing Recommendations (FDM):

• 0.15mm layer height recommended
• 3 perimeters with a minimum of 3 bottom and 3 top layers.
• PLA with good cooling will resolve the highest detail
• NO support material
• NO brim
• Skirt recommended to prime the nozzle

NOTE: Some slicers may indicate the model has errors due tight geometry around the text areas. Don't worry, the model will slice and print fine!