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Mechanical design interview questions for robotics roles
The mechanical questions robotics interviews ask: fits, materials, bearings, mechanisms, motor sizing and design for manufacture, with answer notes.
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Author: Jignesh Panchal
Jignesh Panchal is the founder of Jaadu Digital and author of Robotics Engineering, an India-focused robotics publication. The site uses AI-assisted research and drafting; educational guides and illustrative calculations are not claims of hands-on testing or machinery-safety certification.
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Pneumatic cylinder sizing for robot grippers and lifts
Size pneumatic cylinders properly: bore selection, force per bar, air consumption, compressor sizing, speed control and gripper force checks.
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Ackermann steering for robots: geometry, linkage and code
Ackermann steering for robot builds: wheel angle geometry, linkage choices, servo sizing, path curvature control and odometry integration.
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Force torque sensors for robots: types, specs and use
Six-axis force torque sensing explained: technologies, the specs that matter, gravity compensation, admittance control and a cheap load cell start.
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Complementary filter for IMU: tilt angle without a Kalman filter
Fuse accelerometer and gyroscope on an Arduino: the alpha equation, loop timing, gyro bias calibration and the failure cases that break the…
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Embedded systems interview questions for robotics roles
The embedded interview questions Indian robotics employers ask: C fundamentals, interrupts, protocols, RTOS, power and debugging, with answer notes.
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Robot controller PCB design in KiCad: layout that survives
Design a small robot controller board in KiCad: power blocks, trace width for motor current, grounding, protection, connectors and safe bring-up.
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Vacuum gripper design: force, cups and vacuum generators
Size a vacuum gripper properly: holding force, safety factors, cup types, ejector versus pump, flow on porous parts, sensing and failure modes.
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ArUco markers for robot positioning: detection and pose
Detect ArUco markers in OpenCV and turn them into a metric robot pose: dictionaries, solvePnP, pose ambiguity, accuracy limits and docking tips.
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Camera calibration with OpenCV: chessboard to millimetres
Calibrate a robot camera with OpenCV: capture a good chessboard set, read the RMS error, undistort images and turn pixels into millimetres.