Filament and Printer Test Card

I wanted to make a compact test object with many features that can also double as filament swatch. Features:

Overhang test: 40° / 45° / 50° / 55° / 60° / 65° / 70° (with overhangs around corners)

Bridging: 1cm / 2cm / 3cm with 1mm height, a bridging ramp (1cm width, 0-1mm height) to check thin overhang layers, 3 bridging cylinders (1cm long, 1mm/1.5mm/2mm diameter) and a bridged area on the bottom side.

Ramp (0-1mm): Check transparency of one to a few layers.

Stringing

Fine towers: 0.75mm / 1mm / 1.25mm / 1.5mm

Tolerances/clearance test: rotating parts with horizontal and vertical axes; clearances 0.15mm / 0.2mm / 0.25mm / 0.3mm

Holes: Lots of holes for checking with screws/axles/rods/magnets. one row is 1mm to 3mm, the other is 4mm down to 3mm, both in 0.1mm steps. There are small markings every 0.5mm. There are also some horizontal holes, from 1mm to 2.1mm (in 0.1mm steps); you can check where a piece of filament fits if you want to use that as a hinge for example. The top right hole is 5mm and can be used to string a couple of cards together.

Spherical surfaces (bottom and top): check how the printer behaves with these. The upward dome also makes another (and difficult) overhang test.

Suitable for any layer height (the ramps are sliced into steps/layers by the slicer; layer height can later be inferred from the number of steps).

Mine were printed on a Prusa Mini+ with standard settings of 0.2mm - quality (except I used Hilbert curve for one).

I don't have many different filaments, so I didn't need a storage solution yet. The card is of credit card size, but with 3mm height. It uses a 10.3g of filament and takes 1h17min (0.20mm quality).