Because dimensional accuracy is a difficult balance between the printer motors precision, the filament and the slicer settings I design this test to help calibrate my printer as fast as possible with a quick print. This is a ~15min print test and with it you can measure :

• DIMENSIONAL PRECISION IN THE XYZ AXIS

  • box size is 20x20x15mm
  • bottom hole and corresponding circular peace is 10mm diameter ( 0 tolerance )
  • side square hole and corresponding peace is 6x6mm ( 0 tolerance )
  • side circular hole is 6mm diameter

• FLOW PRECISION

  • box wall is 0.8mm ( best size to test 0.4mm nozzles )

• HORIZONTAL EXPANSION AND HOLES EXPANSION

  • this is great to find the balance between horizontal and hole expansion in Cura
  • if the box has the expected 20x20mm and the circular peace perfectly fit the hole then your horizontal expansion is perfect

• VERTICAL HOLES PRECISION

  • this test is best fit to tune your Z axis

My inspiration for my design : https://www.thingiverse.com/thing:3535060 https://www.thingiverse.com/thing:3220015

Enjoy and post your results!