5-Steps Guide: Creating a Prosthetic Hand in Fusion 360

Prosthetic Hand

Have you ever wondered how prosthetic hands are made? If so, you’re not alone. Prosthetics are fascinating devices that can help people regain lost function and independence. In this article, we’ll take a look at how to create a prosthetic hand in Fusion 360, a powerful 3D modeling software. We’ll cover everything from designing the hand to 3D printing it. So whether you’re a curious hobbyist or a medical professional, read on to learn more about the process of creating prosthetic hands.

The first step in creating a prosthetic hand is to design it. This can be done using 3D modeling software like Fusion 360. When designing the hand, it’s important to consider the patient’s specific needs and requirements. For example, the hand should be the right size and shape for the patient’s hand, and it should be able to perform the tasks that the patient needs it to perform. Once the hand has been designed, it can be 3D printed. 3D printing is a process of creating a physical object from a 3D model. To 3D print the hand, you’ll need a 3D printer. 3D printers are available in a variety of sizes and prices, so you can find one that fits your needs and budget.

Once the hand has been 3D printed, it can be assembled and fitted to the patient. The assembly process will vary depending on the design of the hand. Once the hand has been assembled, it can be fitted to the patient. This process will typically involve taking measurements of the patient’s hand and making any necessary adjustments to the hand. Once the hand has been fitted, the patient can begin using it to perform everyday tasks. Prosthetics can make a big difference in the lives of people who have lost a limb. They can help people regain lost function and independence, and they can improve their quality of life. If you’re interested in learning more about prosthetics, there are a number of resources available online. You can also find support groups and other resources for people who have lost a limb.

Creating the Base Plate

The base plate is the foundation of the prosthetic hand. It attaches to the user’s residual limb and provides a stable platform for the rest of the hand.

To create the base plate, start by creating a new sketch in Fusion 360. Draw a rectangle to represent the overall shape of the base plate. Then, add rounded corners to the rectangle to make it more comfortable to wear.

Extrude the Sketch

Once you have finished sketching the base plate, you need to extrude it to give it thickness. Select the sketch and then click on the “Extrude” button in the toolbar. In the Extrude dialog box, enter the desired thickness of the base plate. For example, you might enter 10mm.

Creating the Palm

The palm is the part of the prosthetic hand that connects the fingers to the base plate. To create the palm, start by creating a new sketch on the top plane of the base plate. Draw a circle to represent the shape of the palm. Then, add two smaller circles to represent the thumb and little finger sockets.

Step Description
1 Create a new sketch on the top plane of the base plate.
2 Draw a circle to represent the shape of the palm.
3 Add two smaller circles to represent the thumb and little finger sockets.

Modeling the Fingers

Now that the palm is complete, it is time to create the fingers. We will be using the same basic technique as we did for the palm, but this time we will be creating five separate fingers.

Finger Phalanges

The fingers are made up of three bones, called phalanges. The first phalanx is the longest and is located at the base of the finger. The second phalanx is shorter and is located in the middle of the finger. The third phalanx is the shortest and is located at the tip of the finger. In Fusion 360, these phalanges are modelled using a combination of cylinders and joints.

Creating the Phalanges

To create the phalanges, we will first create a cylinder for the first phalanx. The diameter of the cylinder should be equal to the width of the palm. The length of the cylinder should be equal to the length of the first phalanx. We will then create a second cylinder for the second phalanx. The diameter of this cylinder should be slightly smaller than the diameter of the first cylinder. The length of this cylinder should be equal to the length of the second phalanx. We will then create a third cylinder for the third phalanx. The diameter of this cylinder should be even smaller than the diameter of the second cylinder. The length of this cylinder should be equal to the length of the third phalanx.

Once the phalanges are created, we will need to join them together using joints. The joints will allow the fingers to bend. To create a joint, we will select the two phalanges that we want to join together. We will then click on the “Joint” tool in the “Assembly” workspace. We will then select the type of joint that we want to create. In this case, we will create a hinge joint.

Phalanx Diameter Length
First 10mm 20mm
Second 8mm 15mm
Third 6mm 10mm

Designing the Thumb

The thumb is a complex and essential component of the prosthetic hand. Follow these steps to design it in Fusion 360:

1. Create a Cylinder for the Thumb Base

Sketch a circle and extrude it to create a cylinder. This will serve as the thumb’s base.

2. Sketch the Profile Plane

Insert a new plane perpendicular to the base cylinder. This plane will define the shape of the thumb’s profile.

3. Sketch the Thumb Profile

On the profile plane, sketch a C-shaped curve that forms the outline of the thumb. Trim or extend the curve to achieve the desired shape.

4. Extrude the Thumb Profile

Extrude the thumb profile along the Z-axis to give it thickness. Ensure that the thickness is sufficient for the desired joint size and strength.

5. Create the Thumb Joints

The thumb consists of two joints: the metacarpophalangeal (MCP) joint and the interphalangeal (IP) joint. These joints allow the thumb to move and grip objects. Here’s how to create them:

a) MCP Joint: Sketch a circle on the thumb base and extrude it to create a cylinder. Rotate the cylinder around the thumb’s axis to create the MCP joint.

b) IP Joint: Sketch a smaller circle near the end of the thumb and extrude it to create a cylinder. Rotate it around the thumb’s axis to create the IP joint.

c) Joint Parameters: Adjust the cylinder dimensions and joint angles to match the desired joint size, range of motion, and stability.

d) Check Interference: Use the “Clash Detection” tool to ensure that the joints do not interfere with each other or with any other components of the prosthetic hand.

Building the Palm

Now we will start designing the palm portion of the prosthetic hand. This will be the main body of the hand and will house the motors, sensors, and other components.

1. Sketch the Palm Base: Create a new sketch on the XZ plane and draw a rectangular shape for the palm base. The dimensions will depend on the desired size of the hand.

2. Extrude the Palm Base: Extrude the rectangle upwards to create a solid palm base.

3. Create Finger Mounting Holes: Sketch circles on the top surface of the palm base where the fingers will be attached. Extrude these circles through the palm base to create mounting holes.

4. Sketch the Battery Compartment: Create a new sketch on the back of the palm base and draw a rectangular shape for the battery compartment. Extrude this rectangle upwards to create a solid compartment.

5. Create Motor Mounting Holes: Sketch circles on the sides of the battery compartment where the motors will be mounted. Extrude these circles through the battery compartment to create mounting holes.

6. Add Details and Features: The palm can be further customized with additional details and features to enhance its functionality and aesthetics. Here are some suggested details to consider:

Detail Purpose
Wrist Connector Connects the hand to the wrist and allows for rotation and flexion
Sensor Mounting Points Provides attachment points for sensors to monitor hand movement and force
Control Buttons Enables the user to control the hand’s functions manually
Aesthetics and Ergonomics Customizes the hand’s appearance and ensures a comfortable fit for the user

Creating Sensory Inputs

Sensory inputs are crucial in creating a realistic and functional prosthetic hand. Fusion 360 allows you to incorporate various sensors into your design, providing sensory feedback to the user.

  1. Pressure Sensors: These sensors detect force applied to the hand and transmit signals to the user, providing tactile feedback.

  2. Position Sensors: These sensors track the movement of the prosthetic hand, enabling the user to perceive its position in space and adjust accordingly.

  3. Temperature Sensors: Incorporating temperature sensors into the prosthetic hand allows the user to detect objects’ temperature, providing additional sensory information.

  4. IMU (Inertial Measurement Unit): An IMU consists of accelerometers and gyroscopes, which measure the prosthetic hand’s orientation and motion. This information can be used to control the hand’s movement and stabilize it.

  5. EMG (Electromyography) Sensors: EMG sensors detect muscle activity, allowing the user to control the prosthetic hand using their own muscle signals.

  6. Vibration Motors: These motors can create tactile feedback by vibrating at different frequencies and intensities, providing sensory cues to the user.

  7. Haptic Feedback Sensors: Haptic feedback sensors create a sense of touch by providing resistance to the user’s movement. This resistance can be adjusted to simulate the feel of various objects.

Integrating Motors and Actuators

Integrating motors and actuators into a prosthetic hand is crucial for providing it with movement and functionality. The type of motors and actuators used will depend on the specific design and intended uses of the hand.

Choosing the Right Motors and Actuators

When selecting motors and actuators for a prosthetic hand, several factors need to be considered, including:

  • Power and torque: The motors should provide sufficient power and torque to move the hand’s fingers and wrist.
  • Size and weight: The motors and actuators should be small and lightweight to minimize the overall weight of the hand.
  • Controllability: The motors and actuators should be easily controlled to achieve the desired hand movements.

Types of Motors and Actuators

The following are common types of motors and actuators used in prosthetic hands:

  • DC motors: DC motors are inexpensive and provide good power-to-weight ratios.
  • Servo motors: Servo motors offer precise control and can be easily integrated with control systems.
  • Linear actuators: Linear actuators provide linear motion and are used to move fingers up and down.

Integrating Motors and Actuators into the Hand

Once the motors and actuators have been selected, they need to be integrated into the prosthetic hand. This involves mounting the motors and actuators to the hand, connecting them to the fingers and wrist, and wiring them to the control system.

Control System for Motors and Actuators

The control system is responsible for receiving input from the user and sending signals to the motors and actuators to generate the desired hand movements. The control system can be implemented using microcontrollers or other electronic devices.

Testing and Calibration

Once the motors and actuators have been integrated into the hand, it is important to test and calibrate the system to ensure proper operation. This involves verifying that the motors and actuators are moving correctly and that the control system is responding to user input.

Motor/Actuator Type Advantages Disadvantages
DC motor Inexpensive, good power-to-weight ratio Limited controllability
Servo motor Precise control, easy integration More expensive, larger size
Linear actuator Linear motion, easy to use Limited range of motion

Finalizing the Design

1. Review the Design

Once the design is complete, take a step back and carefully review it. Check for any inconsistencies, errors, or areas that need improvement. Ensure that all the components fit together seamlessly and that the design meets the desired functionality and aesthetic requirements.

2. Optimize for 3D Printing

Consider the limitations and capabilities of your 3D printer when finalizing the design. Ensure that the model is properly oriented for printing, has sufficient wall thickness, and avoids overhangs that may require supports. Optimize the design for efficient use of material and minimize printing time.

3. Export the Design

Export the completed design into an appropriate file format for 3D printing. Common formats include STL, OBJ, and STEP. Ensure that the exported file is compatible with your slicer software and meets the requirements for your specific 3D printer.

4. Slicing and Printing

Once the design is exported, use a slicing software to generate the G-code instructions for your 3D printer. Adjust the slicing parameters, such as layer height, infill density, and print speed, to optimize the print quality and strength of the prosthetic hand.

5. Assembly and Testing

After printing the components, assemble the prosthetic hand according to the design. Check the fit and functionality of each component. Make any necessary adjustments or modifications to ensure that the prosthetic hand operates smoothly and meets its intended purpose.

6. Post-Processing

Depending on the printing material used, post-processing may be necessary. This may include sanding, smoothing, or painting the prosthetic hand to improve its appearance and durability. Additional finishing touches, such as adding straps or a protective coating, may also be considered.

7. Evaluation and Refinement

Once the prosthetic hand is complete, evaluate its functionality, comfort, and overall performance. Identify any areas for improvement and make necessary refinements to the design. This iterative process ensures that the final product meets the user’s needs and expectations.

8. Future Iterations

The design of a prosthetic hand is an ongoing process. Advancements in technology and materials may lead to future iterations of the design. Consider incorporating innovative features, improving the aesthetics, or optimizing the ergonomic aspects of the prosthetic hand for future upgrades.

9. Sharing the Design

Consider sharing the final design with the open-source community or other interested individuals. This allows others to benefit from your work, encourages collaboration, and promotes the advancement of assistive technology. Make sure to include appropriate documentation and licensing information to ensure proper usage and attribution.

Printing and Assembling the Prosthetic Hand

1. Printing the Parts

Use a 3D printer to print the individual parts of the prosthetic hand using the STL files from Step 9. Set the printer settings according to the material used and the recommended print parameters.

2. Removing and Cleaning the Prints

Once printing is complete, carefully remove the parts from the printer bed and clean them to remove any excess material or support structures. Use a hobby knife or clippers to trim any rough edges.

3. Assembling the Thumb

Insert the thumb dowel pin into the thumb joint piece and secure it with super glue. Slide the thumb base over the dowel pin and attach it to the joint piece using screws.

4. Assembling the Fingers

Insert the finger dowel pins into the finger joint pieces and secure them with glue. Attach the finger bases over the dowel pins and fasten them to the joint pieces using screws.

5. Assembling the Palm and Wrist

Connect the finger assemblies to the palm base by inserting dowel pins and securing them with screws. Assemble the wrist joint by inserting the wrist pivot into the palm base and securing it with a screw.

6. Attaching the Wrist Enclosure

Slide the wrist enclosure over the wrist joint and secure it with screws. This will enclose the electronics and battery pack inside the hand.

7. Installing the Electronics

Insert the Arduino Nano and servo motors into the dedicated slots in the wrist enclosure. Connect the servo wires to the Arduino board according to the wiring diagram.

8. Installing the Battery

Place the 9V battery into the battery compartment in the wrist enclosure and secure it with battery terminals or tape.

9. Finishing and Testing

Test the hand by connecting it to a power source and using the Arduino software to control the servos. Adjust the servo positions if necessary to ensure smooth finger movements.

10. Customization and Adjustments

The prosthetic hand can be customized to fit different hand sizes and needs. Adjust the lengths of the fingers and thumb by modifying the STL files in Fusion 360 and reprinting the parts. Experiment with different materials and design variations to suit specific requirements.

How to Create a Prosthetic Hand in Fusion 360

Creating a prosthetic hand in Fusion 360 is a complex task, but it can be done with the right tools and knowledge. This guide will show you how to create a basic prosthetic hand in Fusion 360, from start to finish.

First, you will need to create a new project in Fusion 360. Once you have created a new project, you will need to import the STL file of the prosthetic hand. You can find STL files of prosthetic hands online, or you can create your own using a 3D modeling program.

Once you have imported the STL file, you will need to create a new body in Fusion 360. The body will be the main component of the prosthetic hand. To create a new body, click on the “Create” tab and then click on the “Body” button.

Next, you will need to insert the STL file into the body. To do this, click on the “Insert” tab and then click on the “Insert Mesh” button. Navigate to the STL file that you want to insert and click on the “Open” button.

Once you have inserted the STL file, you will need to scale it to the correct size. To do this, click on the “Transform” tab and then click on the “Scale” button. Enter the desired scale factor and click on the “OK” button.

Now you will need to create the joints for the prosthetic hand. To do this, click on the “Create” tab and then click on the “Joint” button. Select the two components that you want to connect and click on the “OK” button.

Repeat this process for each joint in the prosthetic hand. Once you have created all of the joints, you will need to constrain them. To do this, click on the “Constrain” tab and then click on the constraint that you want to apply. For example, you can apply a revolute joint constraint to allow the joint to rotate, or a translational joint constraint to allow the joint to move in a straight line.

Once you have constrained all of the joints, you will need to add a motor to the prosthetic hand. To do this, click on the “Insert” tab and then click on the “Motor” button. Select the joint that you want to attach the motor to and click on the “OK” button.

Now you will need to wire the motor to the controller. To do this, click on the “Wire” tab and then click on the “Wire” button. Select the motor and the controller and click on the “OK” button.

Finally, you will need to test the prosthetic hand. To do this, click on the “Play” button in the toolbar. The prosthetic hand will start to move. You can use the controller to control the movement of the prosthetic hand.

People also ask about How to Create a Prosthetic Hand in Fusion 360

What is the best material to use to create a prosthetic hand?

The best material to use to create a prosthetic hand depends on the specific application. For example, if the prosthetic hand is going to be used for everyday activities, then a lightweight and durable material such as carbon fiber or titanium may be a good choice. However, if the prosthetic hand is going to be used for more demanding activities, such as sports or heavy lifting, then a stronger material such as steel or aluminum may be a better choice.

How much does it cost to create a prosthetic hand in Fusion 360?

The cost of creating a prosthetic hand in Fusion 360 will vary depending on the specific materials and components that are used. However, as a general rule of thumb, you can expect to spend between $500 and $2,000 to create a basic prosthetic hand.

How long does it take to create a prosthetic hand in Fusion 360?

The time it takes to create a prosthetic hand in Fusion 360 will vary depending on the complexity of the hand and your level of experience with the software. However, as a general rule of thumb, you can expect to spend between 20 and 40 hours to create a basic prosthetic hand.