View source for 3D Filament Temperature Tower

If you have a new filament, and you're not sure what temperature to use with it, one way to explore the possible settings is to make a Temperature Tower, which uses different temperatures for each section.
[[File:OpenSCAD Temperature Tower Customization.png|thumb|Customize these values]]
There are lots of Temperature Tower models out there. I've been using this one, because it is easy to customize the tower: https://www.thingiverse.com/thing:4876406

If you open this model in [https://openscad.org/ OpenSCAD], you can edit the start and end temperatures. You may want to look at the filament manufacturer's suggested range and go a few steps beyond it in both direction.

Click the Render button (cube with hourglass) and then the STL button to export the STL.
[[File:Custom G-code.png|thumb|Custom G-code]]
Open PrusaSlicer and load the STL. Set the filament to a good guess for your filament. A setting like "Generic PETG" should work if there is no manufacturer-specific preset. 

Make sure you're set up for the the Expert UI (Configuration > Configuration Assistant...) will let you change this. Go to the Printer tab, and select Custom G-code. In the Before layer change G-code box, enter
 ; TEMP FOR LAYER {layer_num - 7} TOWER FLOOR {(layer_num-7) / 50 + 1}
 M104 S{<START TEMPERATURE> - (layer_num-7) / 50 * 5}
And change the <code><START TEMPERATURE></code> to match what you set in OpenSCAD.

Slice the model and export the gcode.

I have found that PrusaSlicer likes to forget the custom G-code when I change unrelated things, so I like to double check my gcode by running something like this:
 grep 'TEMP FOR LAYER .*[05]0' -A 1 Temp_Tower_235-195_PLA_w_gcode_0.2mm_PETG_MK3S_2h29m.gcode
This shows you a bunch of the temperature changes, so you can double check them:
 ; TEMP FOR LAYER 50 TOWER FLOOR 2
 M104 S230
 --
 ; TEMP FOR LAYER 100 TOWER FLOOR 3
 M104 S225
 --
 ; TEMP FOR LAYER 150 TOWER FLOOR 4
 M104 S220
 --
 ; TEMP FOR LAYER 200 TOWER FLOOR 5
 M104 S215
 --
 ; TEMP FOR LAYER 250 TOWER FLOOR 6
 M104 S210
 --
 ; TEMP FOR LAYER 300 TOWER FLOOR 7
 M104 S205
 --
 ; TEMP FOR LAYER 350 TOWER FLOOR 8
 M104 S200
 --
 ; TEMP FOR LAYER 400 TOWER FLOOR 9
 M104 S195
[[File:Temp Tower Check.jpg|thumb|Temp Tower Check]]
When you're sure your G-code is right, print the model. I like to check after the base prints, and again after the first floor to make sure the nozzle temperature is actually what it should be.
[[Category:3D Printing]]