Basic object for Creality CR-30 belt alignment

A basic 2 layer high brick to help align the printer belt on a Creality CR-30 (or other belt-based printer).

Alignment can be troublesome when printing standard objects on a belt printer, since a multi-layer object will mean that the print head is often printing layers that are off the surface, making a mess before you have had a chance to properly get the bottom layer made. Using this brick you can focus on the task since you are only printing 2 bottom layers and can make frequent small adjustments until you get the layer just right !