Can a Linear-Coil Spring Improve the Accuracy of a Weighing Machine?

In summary, a weighing machine based on a potentiometer works by changing the current in the circuit through adjusting the length of a wire, which in turn changes the deflection in the ammeter. To address the issue of uneven force distribution and bending springs, a possible solution is to use a linear-coil spring and suspend a basket from it, allowing for more lateral stability on expansion rather than compression. This design is similar to the 2-pan Roverbal balance, which also ensures uniform weight distribution regardless of where the weights are placed.
  • #1
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Project: Weighing machine based on potentiometer
Principle: On changing the length of the wire current in the circuit will change which will change the deflection in the ammeter

Set up: On top of four or three spring(same spring constant) a board is attached so when a weight is kept on top of it, the spring will compress and Jockey/slider attached with the board will slide on the wire and length changes

Problem: the problem is that when a weight is kept on top of the board, the spring tries to bend and the distribution of the force is not uniform. So is there a way out so that the force of the springs will be uniformly distributed and the spring will not bend?
 
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  • #2
is there a way out so that the force of the springs will be uniformly distributed and the spring will not bend?
A linear-coil spring is usually more laterally stable on expansion rather than compression.
Replace board with basket - suspend basket from spring - put weights to be measured in basket.
There are many designs that do what you want with your equipment - eg. look at how a 2-pan Roverbal balance works (with those it does not matter where the weights are placed in the pan: how do they do that?)
 
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Related to Can a Linear-Coil Spring Improve the Accuracy of a Weighing Machine?

1. How does a weighing machine work?

A weighing machine works by using a load cell, which is a device that measures the force applied to it. When an object is placed on the weighing machine, the load cell compresses and measures the force. This force is then converted into an electrical signal and displayed on the machine's screen as weight.

2. What is the accuracy of a weighing machine?

The accuracy of a weighing machine depends on various factors such as the type and quality of the load cell, the design of the machine, and the calibration process. Generally, most weighing machines have an accuracy of around 0.1% to 0.01%, meaning that they are accurate within 1 gram to 0.1 grams.

3. How do you calibrate a weighing machine?

To calibrate a weighing machine, you will need calibrated weights that have a known and accurate weight. Place the weights on the machine and adjust the calibration settings until the displayed weight matches the known weight of the weights. This process should be repeated regularly to ensure the accuracy of the weighing machine.

4. Can a weighing machine measure different units of weight?

Yes, most modern weighing machines have the capability to measure weight in different units such as kilograms, pounds, ounces, etc. You can usually switch between units by pressing a button or selecting the desired unit on the machine's display.

5. How do you maintain a weighing machine?

To maintain a weighing machine, you should regularly clean the machine to remove any dust or debris that may affect its accuracy. You should also avoid placing heavy objects on the machine and regularly calibrate it to ensure its accuracy. If the weighing machine is not functioning properly, it is best to contact a professional for repairs.

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