Summary

A quick print to indicate how much offset is needed when fine tuning, multi- print head printers.
V.2 has a built in direction indicator. Shorter height, faster print.

Instructions

V.2 has an printed direction indicator. Just print and adjust. You don't need to let it finish printing. Stop the job after 3 or 4 layers. Check for alignment, and adjust for any offset.

V.1 Before removing this from printer, mark the front side with a sharpie or other marker. You can't tell which side is what if you remove it without an indicator
The inner square should have slight nibs sticking out evenly on all sides of the outer square. If they do not match, measure the larger nib, and divide by 2 for the offset adjustment amount.

Dual print head calibration chip (Improved)