Balance Scales for low gram weights

thingiverse

I made these scales to measure few- and sub-gram objects using known weights as counterbalance. They can go up to 30g, but accuracy is limited to about 25mg with good tuning. However, the design lacks consistency and requires balancing before each measurement. Moreover, measurements can be affected by static electricity due to the plastic material. I advise against using these scales for scientific purposes; instead, invest in real weighing equipment. To assemble the scales, use the thinnest wire possible for pivot points to minimize friction. Begin by balancing the beam, then balance with connected cups, adding tape as needed. The highest hanging point on the middle beam offers least precision but easiest balance, while the lowest point provides highest precision but is hardest to balance. If you want to create your own sub-gram weights, follow these steps: 1. Obtain a known weight object, like a coin. 2. Coil wire and cut it to match the known object's weight. 3. Count the number of wraps for reference. 4. Cut the desired number of wraps for your new weight.