Parametric temperature & bridging tower + G-Code generator

This is a completely parametric temperature tower remake from Tronnic's work (rather than a remix). I liked its basic design, but I missed the ability to tweak on parameters, and hence it is!

You can:

• Set the temperature range and the change rate (in intervals of 1 degrees minimum), and either increasing or decreasing temperature as the tower rises.
• Modify the length and thickness of the bridge, and how many cones (for stringing check) are on it.
• Choose the angles for both overhang tests.
• Choose the size of the modules (depth and height, as the width is calculated automatically depending on the bridge length and the overhang angles). 
• Choose between two base styles: the default rounded, wider base (as in Tronnic's design) or another, slimmer one, that doesn't protrude from the tower. You can also select its thickness. If you choose the rounded base, you can select its corner radius, to make smaller or bigger bases; that works well with materials that are hard to stick to the plate and usually you'd print with a wide brim (like polypropylene).
• Choose the font that the numbers will be printed in, and its depth. 

The OpenSCAD customizer will output the G-Code you need to add to "After Layer Change" section in "Printer Settings" of your slicer to fit the temperatures. Make sure you enter the layer height you'll be printing at, and preferably that you have the first layer of the same height as the others, and the filament temperatures set at the starting ones (to avoid conflicts between instructions).

The OpenSCAD customizer will also output a suggested file name for your tower; to export it as STL, render it in CGAL with F6 or menu Design->Render, then F7 or the click the "STL" button or File->Export->STL. The nomenclature of this file is:

Temp_tower-{module depth}x{module height}-{first temperature}_to_{last temperature}_step{temperature change rate}-br{bridge length}x{bridge thickness}-c{number of cones}-a{overhang angle on the short side}_{overhang angle on the long side}-(thin_)base{base thickness}(_cr{corner radius})-{layer height}(-{text depth if != 0.6}td)(-{material})

The file naming convention may look overcomplicated, but it helps to tell apart different tower designs.

Finally, with the Recymbol library installed, you can add a recycling symbol in one of three styles (for print-on-print, simple bridging or stacked bridging —which looks better-). The library is not required; the customizer program will just output some errors, and that's it. But installing it is easy, and it's free: just download the library file, open your OpenSCAD library folder (see the menu File->Show Library Folder in OpenSCAD), create a "Recymbol" folder in it, and drop the library.scad file in that "Recymbol" folder; no additional steps required.

As seen in the pictures, the recycling symbol can be printed in another color, without an MMU, with the “print-on-print” technique by Davin Montes. It's more detailed in the Recymbol entry, but in a nutshell you just print the symbol, remove purge line and skirt, change filament, and print the tower just on it ("print-on-print"). There's an offset to the negative spaces in the tower so there's no smearing or dragging.

You might want to check also my other calibration utilities, all parametric and customizable:

• The extruder multiplier calibration cube
• The simple temperature tower, with G-Code generator
• The E-Cor tower (waveform for the TMC stepper drivers), with G-Code generator.
• The parametric overhang test, with support enforcer generator.
• The ironing calibration matrix, with modifier generator.

And, also, the non-parametric-but-modifiable precise Live-Z calibration test.

Once you're done testing and calibrating, sample your filaments with the parametric swatches!

Happy printing!