Layer Adhesion Measurement Device

This apparatus is intended to be used with a trigger-pull-force scale. They are probably only a couple bucks on line, or you can use my 3D printed one here: https://www.thingiverse.com/thing:5752380

The handle eats a couple meters but you only print it once. The keys are designed to use very little filament (about a meter) and print in under an hour at 0.1mm layers.

The concept is pretty simple. Put a key in the handle, and hook the pull-force gauge onto the key. Pull down until the rod snaps off, and record the reading on your force gauge. Do this for several extrusion temps and make a plot. You'll see quickly what temp provides optimal strength for the given layer thickness(es). For the example shown in the second image, it's clear the filament should be extruded at 210C regardless of layer thickness.

I have drawn up 6 labeled keys, 200C, 210C, and 220C at 0.1 mm and 0.2 mm layer-heights each. You can obviously slice them at whatever settings you want, but I hav