Strain Gage
thingiverse
A Quick Force Indicator for Prusa MMU2 Filament Pull: A simple, yet effective device to gauge the force required to draw filament through the Prusa MMU2. It's not a precise measurement, but will give you a relative comparison of drag. Take a reading using the pointer and the "teeth". Displayed with a 16-ounce weight attached. You'll need a wire or string to secure the alligator clip/clamp onto the filament. This setup can also help determine how much force your Bondtech gears can withstand before slipping.
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