Summary

A fixed stl version of http://www.thingiverse.com/thing:210111 that works with Slic3r.

Instructions

From @de_baseggio: "After slicing this 10cm high column change the extruder temperature in the GCODE file after 10mm travel in the Z axis. Examine the print and determine the best extruder temperature for the filament you are currently using. The printed columns can be stored and used as reminders if the same filament is used in the future."

In the gcode, look for the M104 command. Example:

M104 S205 ; set temperature

Then add it to the gcode produced from your slicer, after the end blocks, like this:

...
G92 E0
M104 S200 ; set temperature
G1 Z10.200 F7800.000
...

Set the correct temp based on the Z location from the command:

G1 Z

Add all temperatures to the gcode near the command to move to a new Z in the correct order as shown above.

Hope that helps.

Extruder Temperature Testing