A customizable model to test areas of your heatbed for proper first-layer printing.

How to use:

1. print the model
2. check that first layer "squish" is the same on all the circles
3. raise/lower the nozzle at the left, right, front or back of you bed to adjust

The included STL model has nine circles which are 0.3mm high as I tested with 0.2mm layers with a first layer printed at 150% (0.3mm) and I only wanted to lay down a single layer for this test.

You can customize this model to set your preferred height, circle diameter, number of circles and distance between circles.