Cooling Calibration Column (quick printing)
The purpose of this column is to test for small prints that the previous layer is being adequately cooled before the next layer is printed. The column should be nicely layered and 1cm high. It will print on a slow printer in less than 15 minutes.
Should the column be garbled this probably means the previous layer is still molten while the next layer is being printed. Try slowing the print speed and/or adding a print cooling fan.