# Making a Fraction Calculator

TLDRIn this video, the host guides viewers through crafting a DIY fraction calculator, a tool that simplifies adding and subtracting fractions in imperial measurements. The process involves creating two circles, each divided into 64 sections, using a spoke generator for precision. After marking values and drilling holes, the circles are assembled with a drive pin rivet, allowing one to rotate freely. The calculator is tested with fraction addition and subtraction, and the host shares a downloadable pattern for viewers to create their own, enhancing woodworking accuracy.

### Takeaways

- 😀 The video is a tutorial on creating a DIY fraction calculator.
- ✂️ The project involves making two circles, each divided into 64 sections, to represent fractions.
- 💻 A spoke generator program is recommended for dividing the circles into equal sections.
- 🎨 The first circle is marked with incremental values starting from zero, representing fractions of an inch.
- 🔵 The second circle is marked similarly but has a different starting point and includes a cut-out for a handle.
- 🔩 The two circles are connected using drive pin rivets to allow the top circle to rotate freely.
- 🛠️ A scroll saw is used to cut the hardboard according to the patterns created.
- 🔨 Holes are drilled in the larger wheel for the rivets, and a central hole is drilled in both pieces to align them.
- ✅ The calculator is used by aligning fractions on the top circle with the zero mark on the bottom circle and rotating to add or subtract.
- 🔧 Modifications can be made to the design, such as removing the handle or adding decimal equivalents for fractions.
- 📧 The creator offers a PDF pattern for the calculator, which can be requested via email.

### Q & A

### What is the main project discussed in the video?

-The main project discussed in the video is making a fraction calculator.

### Why did the presenter decide to make their own fraction calculator?

-The presenter decided to make their own fraction calculator because the one they previously used was no longer in production and they couldn't find a link to purchase one.

### How many sections does each circle of the fraction calculator need to be divided into?

-Each circle of the fraction calculator needs to be divided into 64 equal sections.

### What tool did the presenter use to divide the circle into 64 sections?

-The presenter used a spoke generator program found online to divide the circle into 64 sections.

### What is the purpose of marking zero on the fraction calculator?

-Marking zero on the fraction calculator is to establish a starting point for all calculations.

### How does the presenter correct the mistake made while marking the fractions on the calculator?

-The presenter corrects the mistake by erasing the incorrect markings and rewriting the correct fractions in pencil.

### What material is used to make the fraction calculator?

-The fraction calculator is made using hardboard, with the lower wheel using 1/8-inch thick hardboard and the top wheel using 1/4-inch thick hardboard.

### How are the two discs of the fraction calculator fastened together?

-The two discs of the fraction calculator are fastened together using drive pin rivets.

### How does the presenter demonstrate the use of the fraction calculator?

-The presenter demonstrates the use of the fraction calculator by adding fractions such as 1/8 and 1/8, showing how to reset the calculator to zero and how to read the results in the answer window.

### What issue did the presenter encounter with the prototype's handle?

-The presenter found that the handle they designed for the prototype got in the way of the measurements and blocked out the holes, making it impractical.

### How can the fraction calculator be modified to include decimal equivalents of fractions?

-The fraction calculator can be modified to include decimal equivalents by making the window on the top circle larger and writing the decimal equivalent of each fraction on the bottom circle where the window would be extended.

### Outlines

### 🔩 Introduction to Building a Fraction Calculator

The video begins with the host introducing a DIY project to create a fraction calculator, inspired by a previous show where one was used. The original calculator is no longer available, prompting the host to make their own. The project starts with laying out two circles, each to be divided into 64 equal sections. A spoke generator program is recommended for this task. The host demonstrates marking values from 1/64 inch increments around the circle, starting at a designated zero point. A second, slightly larger circle is then drawn, with lines extended from the segments to mark drilling points for holes. The zero point is marked in black for clarity. The host also discusses a mistake made during the marking process and how it was corrected.

### 📏 Creating the Top Wheel and Handle for the Fraction Calculator

The second paragraph details the creation of the top wheel of the fraction calculator. The host instructs to choose a starting point and mark fractions in increments of 1/64, going counterclockwise. A circular mark is made for a thumb hole to hold the calculator, and a cut-out section is planned for the zero point to serve as a stop mechanism during calculations. The host also discusses the process of creating a PDF pattern for the wheel and the use of hardboard for the material. The video then transitions to attaching the patterns to hardboard using spray adhesive and proceeds to cutting the shapes on a scroll saw.

### 🛠️ Assembling the Fraction Calculator

In this section, the host focuses on drilling holes in the larger wheel for assembly and using a brad point bit for clean cuts. The top wheel is then aligned with the larger wheel, ensuring the perimeters match, and a central hole is drilled through both pieces. Drive pin rivets are used to fasten the two discs together, allowing the top wheel to spin freely. The host demonstrates the basic functionality of the fraction calculator, explaining how to add fractions by aligning marks and spinning the top wheel until it hits a stop point. The process for subtracting fractions is also briefly touched upon.

### 🔧 Refining the Fraction Calculator Design

The host identifies an issue with the prototype's handle, which obstructs the view of certain fractions. They decide to revise the design by removing the handle and replacing it with a simpler method to hold the calculator. The video shows the process of disassembling, modifying, and reassembling the calculator with a new drive pin. The host also suggests alternative fastening methods, such as using a nut and bolt or a nail, for those who do not have brass drive rivets. They emphasize the calculator's utility in a workshop for simplifying the addition and subtraction of imperial measurements.

### 📝 Conclusion and Offering the Fraction Calculator Pattern

The video concludes with the host expressing gratitude for the viewers' engagement and interest in the fraction calculator project. They offer the pattern for the calculator as a token of appreciation, inviting viewers to contact them via email to receive the PDF file. The host also encourages viewers to like, subscribe, and turn on notifications for future episodes. They reflect on the time-consuming process of creating the pattern and express hope that the viewers will find the calculator useful in their own workshops, suggesting potential modifications such as adding decimal equivalents of fractions.

### Mindmap

### Keywords

### 💡Fraction Calculator

### 💡Spoke Generator Program

### 💡Hardboard

### 💡Scroll Saw

### 💡Drive Pin Rivets

### 💡Imperial Measurements

### 💡Prototype

### 💡Decimal Equivalent

### 💡Wacometer

### 💡Functional PDF

### Highlights

Introduction to creating a DIY fraction calculator.

The inspiration for the project came from a previous show where a fraction calculator was used.

The decision to make a fraction calculator after being unable to find one for sale.

Explanation of the materials needed: two circles to be divided into 64 equal sections.

Utilization of a spoke generator program to create the circle layout.

Marking the starting point and incrementing values by 1/64th inch around the circle.

Correcting a mistake in the measurements and the importance of accuracy.

Creating a larger second circle with extended lines for the segments.

Marking drill holes and the zero point on the extended circle.

Designing a handle and a stop mechanism for the calculator.

Laying out the second circle with a different starting point.

Creating a functional prototype despite the handle design flaw.

Cutting the hardboard to the pattern shapes using a scroll saw.

Drilling 3/32nd diameter holes for the calculator's mechanism.

Assembling the calculator using drive pin rivets.

Demonstration of how to use the fraction calculator for addition and subtraction.

The potential for customization, such as adding decimal equivalents to the calculator.

Offer to share the PDF pattern for the fraction calculator with interested viewers.

Reflection on the learning experience and the iterative design process.

Conclusion and invitation for viewers to engage with future content.