Measure coffee beans right from the scoop!

This functional print is a weighting scale disguised as a coffee scoop, use it to measure coffee beans and more!

BOM

• 1x each .stl

• 6x M3 x 16mm countersunk bolts (longer ones if not countersunk)

• 6x M3 nuts

• A Sharpie and a syringe (or other known volume) for calibration

How to print

Print one of each .stl at 20% infill. The spoon should be printed with the handle laying flat, the fulcrum should be laying on its side and have a brim, while the counterweight should be printed with the nut holes facing up and countersinks on the bottom. The scoop has a bit steep of a overhang but printed nicely on my stock Ender 3 Pro without supports at 0.16mm dynamic layer height and 75mm/s speed.

The counterweight should be a snug fit, sand the spoon as needed util the desired snugness is met.

Calibration

A sample PDF is provided with my measurements, ready to be printed and glued to the spoon. I printed in a colored A4 sheet and cut it to size, using common packing tape to fix it.

For determining your own calibration scale, use water in a syringe to get measurement points.

• Add 5mL of water to the scoop
• Find balance point and mark it
• Add 10mL of water
• Find balance point and mark it again
• Measure the distance betweet the two marks (in cm)
• Find your scale (in grams/cm) by dividing your measurement by 10.
• e.g The spacing between 5mL and 15mL was 3.4cm, therefore you should mark a gram every 0.34cm.

This is important because every filament and infill setting may result in a different weight distribution, so without performing calibration first the scale would be useless.

Safety

This print should be safe to use with whole beans, however care should be taken with ground beans/other porous materials. Please use food-safe PLA if measuring anything porous.

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(Please use this link as the Tip Me button isn't supported in Brazil)

Attribuition

This design is based on a scoop sold by Pressca in Brazil.