Balance Scales for low gram weights

thingiverse

<p>I made these scales to measure few- and sub-gram objects using known weights as counterbalance, though can go up 30g. It can tell about 25mg difference at best with good tuning, though it's lacking consistency and needs to be balanced before every measurement. Because of plastic material measurements can be affected by static electricity. For hobby purposes only. For anything scientific buy real scales. </p> <p>Use thinnest wire possible to create pivot/hang points to reduce friction. First balance the beam, then balance with cups connected adding pieces of tape where needed.</p> <p>Highest hang point of the mid beam is the least precision but easiest to balance, lowest is the highest precision but hardest to balance<p> <p>If you want to make your own sub-gram weights:</p> <ol> <li>Get a known weight object, like a coin</li> <li>Coil up some wire</li> <li>Cut the coil to same weight as known object and count number of wraps</li> <li>Cut number of wraps to your desired weight</li> </ol>