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Motion Matters: Analyzing Robotic Arms and Preparing for User Interviews
How can we analyze and describe robotic arm motion to design a solution that meets a real user's needs?
Learning Intentions:
Apply the tangent ratio to calculate angles from measurements and prepare precise, open-ended interview questions to gather useful data from a real user.
Today's Concept:
You've been estimating angles. Today you calculate them. The tangent ratio — tan θ = opposite / adjacent — gives you a tool to find an exact angle from two measurements instead of guessing with a protractor. It's the first step toward precision in your design.
You're also getting ready to interview your user. A bad interview question gets you a one-word answer. A good one gets you the detail your design depends on. Before you walk into that conversation, you need questions specific enough to produce numbers and observations you can actually use.
Activity
Activity
Explore It – Motion Analysis
Your homework this weekend is to interview a real person about a task that is tiring, repetitive, or hard. Ask your planned questions. Bring notes and motion details back for Monday!
Take a photo, make a sketch, or write detailed notes about any motions the user describes so you don’t forget.
Next week, you’ll use what you learned in your interview to start designing a robotic arm solution. We’ll sketch, plan, and simulate motion using the trig skills we’ve practiced.
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