How to design a 3D Printing Coin Sorter

3D printing technology has revolutionized several sectors, providing practical and customizable solutions to everyday problems. In the financial sector, where counting coins can be a tedious and error-prone process, 3D printing offers a unique opportunity to create tools that increase efficiency and accuracy.

The 3D printed euro coin separator combines practicality with cost savings. Using affordable materials and an optimized design, this device allows for quick and accurate separation of different euro coins. The 3D printing approach not only reduces production costs compared to traditional manufacturing methods, but also allows customization and adjustments according to the user's needs, making it a versatile and adaptable tool.

This article covers the creation and functionality of a euro coin separator, developed using 3D printing and designed to make counting and organizing money easier. Additionally, we will present performance tests that demonstrate the effectiveness of the device in counting euro coins. With this, it is expected to show how 3D printing can be a practical and efficient solution to specific problems, such as counting coins, contributing to more agile and accurate financial processes.

Currency Separator Structure

Have you ever wondered how you could organize your coins quickly and efficiently? How can a 3D printed coin separator turn this everyday task into a streamlined process for counting coins?

One of the great advantages of using a coin separator is that it facilitates the process of organizing and counting coins. Without it, the process is slow and tiring. Below is the structure of the euro coin separator.

Next, we will discuss the structure of each part of the euro coin tab.

Coin separator mechanisms

The coin separator is made up of several parts. Among them, we have:

1. Coin tower;

2. coin collectors,

3. engine base,

4. gears, and

5. Support base.

The coin tower is used so that the user can place coins that will be separated and organized. Next, we have its structure.

The tower is used to align the coins that will be separated. These coins will be moved through the two gear mechanisms that are presented below.

The smaller gear will be coupled to a direct current motor. The larger gear will be coupled to the smaller one and will be used to move the coins.

Why use two gears with different tooth quantities?

The rotation ratio between gears is determined by the relationship between the number of teeth of the gears involved. When a larger gear (with more teeth) is coupled to a smaller one (with fewer teeth), the smaller gear rotates more times for each complete rotation of the larger gear. For example, if a larger gear has 40 teeth and a smaller gear has 20 teeth, the rotation ratio is 2:1.

This means that the smaller gear will rotate twice for every full rotation of the larger one. This inversely proportional relationship between the number of teeth and rotation speed allows the modification of speed and torque in the system.

The tooth ratio between the gears allows the larger gear to move more slowly during the coin movement process. The DC motor coupling base is shown below.

At the top of the base we have the coupling of the two gears. Below we have the coupling between them.

As you can see, the DC motor is coupled to the smaller gear and this will transmit the movement to the larger gear. The larger gear is made up of several circular holes. These holes will be used to move the coins to their respective locations.

The coins will reach the holes of the larger gear through the coin alignment tower, that will be coupled with the base dc motor. Below we have a presentation of its structure.

As the coins move, they will fall into the coin collectors. Each collector has a specific diameter. This diameter is based on the size of the coin. Below we have the structure of the collectors fixed to the support base.

Finally, we have the union of the support base, the coin selectors and the motor base. This can be seen in the figure below.

Next, we will present the process of moving and selecting coins.

Currency Separation Results

The coin separator project presented satisfactory results during its operation. To simulate the project, pieces with dimensions identical to European coins were selected. Below we have a representation of the coins that represent each value with different colors.

To start the process, all coins were inserted into the coin tower and the DC motor was started.

In the picture below, you can see that the coins fall due to the effect of gravity onto the holes in the coin movement gear.

Next, see the rotational movement of the larger gear carrying out the process with several coins.

Finally, we have all the coins separated into their respective storage locations. As can be seen, the system presented satisfactory results and was quite fast in the process of organizing and separating the coins.

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