Robot Manipulator Design Advanced Topics - Part 2

Robot manipulators are everywhere in modern automation — from factories to service robots. In this post, we’ll go over the key basics that every robotics engineer should know before designing a robot arm.

📋 3 Things to Know Before Starting

Before you design a robot arm, ask yourself these important questions:

• 1. What task will the robot do?
  Will it lift, move, weld, or assemble something? The task helps you decide the structure and capabilities.
• 2. Where will the robot work?
  This is called the workspace — the area the robot must reach and move in. You need to know the size, shape, and environment.
• 3. What will the robot carry?
  The weight (payload) affects the material choice, joint design, and motor power. You want it strong, but not too heavy!

🔍 Why Robot Arms Matter

Robot arms bring huge benefits to industry and daily life. They help to:

• Save time and reduce production delays
• Cut labor costs and improve return on investment
• Protect humans from dangerous or boring tasks
• Reduce errors and improve quality
• Work non-stop, 24/7, with no breaks!

🦾 Robot Arm vs Human Arm

Robot arms are inspired by the human arm. Here's how they compare:

• Base: Like the human torso
• Shoulder, Elbow, Wrist: Give the arm flexibility and reach
• End Effector: Like the hand — it grabs or moves things

Both are designed to reach, grip, and move objects — just in different ways.

📐 How to Define the Workspace

The workspace is the area the robot arm can reach. There are two main ways to analyze it:

• Graphical Method: Use CAD software to draw the robot and see its movement range visually.
• Analytical Method: Use geometry and math formulas to calculate reach based on joint lengths and angles.

✅ Compare both methods to check your accuracy. If they match, you’re on the right track!

🎥 Watch the Full Video

Want a visual explanation? Watch the full video here:
Robot Manipulators Design - Part 2 (YouTube)