Hi there,
i did a remix of a temperature calibration thing i have seen.
Did some tests and i think it works pretty well.
I used it with PLA an did a temperature change of 3°C every 10mm (50th at 0,2mm layerhight).
The number of shells outside is 2 so that the cubold isn’t to fragile and it fits more to real prints.
The difference is 51min with 2 shells to 31min with one shell.
http://www.thingiverse.com/thing:824963
Direct link to the gcode with the right temperature settings without heating bed and only one extruder.
http://www.minamaxe.de/3DPrint/tmpcalv1_1f_rev2.gcode
I hope one can see it, the print looks smoother at 186°C.
My Idea is to build a little database of the different printing materials and good starting point temperatures.
Maybe it is worth to give it a try.
Misc