Industrial Robots — Kinematics and Programming

Industrial robots are programmable mechanical manipulators used to automate tasks in manufacturing: welding, painting, pick-and-place, assembly, and palletising. Key concepts include robot kinematics (how joint angles map to end-effector position), work envelope, payload, repeatability, and programming (teach pendant, offline programming, ROS).

Why companies use it

·Robots provide consistent quality and cycle time on repetitive tasks where human fatigue causes variation
·Collaborative robots (cobots) from Universal Robots, FANUC CRX, and KUKA LBR work safely alongside humans without safety fencing
·Return on investment for robotic cells is typically 18–36 months in medium-volume manufacturing
·Robots can work in environments unsafe for humans: high temperature, dust, fumes, and confined spaces

What hiring managers look for

·Automation engineers who can programme, commission, and troubleshoot industrial robots are in high demand across manufacturing sectors
·Knowledge of major robot brands (FANUC, KUKA, ABB, Yaskawa, Universal Robots) and their programming environments shows practical breadth
·Understanding robot safety (ISO 10218-1, ISO/TS 15066 for cobots) is essential in any role involving robot system integration
·Experience with offline programming (RoboDK, Delmia, Visual Components) reduces robot commissioning time and risk

Typical interview questions

What is the difference between a robot's repeatability and its accuracy?

Explain forward kinematics and inverse kinematics. Which is harder to solve and why?

What is a robot's work envelope and why does it matter for system integration?

How do you ensure safety when humans and industrial robots work in the same area?

Describe a robot cell you have programmed or commissioned. What was the application and what challenges did you encounter?

Common mistakes

·Confusing repeatability (how precisely a robot returns to a taught point) with accuracy (absolute position accuracy) — most industrial robots are highly repeatable but not necessarily accurate
·Not performing a risk assessment before installing a robot cell — ISO 10218-2 requires a risk assessment of the complete robot system
·Teaching robot points under ideal conditions without accounting for part variation — robust robot programmes use vision systems or compliant tooling to compensate
·Ignoring cable management in the robot cell design — cables on the robot arm are subject to continuous flexing and fail prematurely without proper management
·Programming robots with teach pendant exclusively on complex paths — offline programming dramatically reduces production downtime during commissioning

Real engineering example

An electronics manufacturer automated a PCB depanelling process with a FANUC M-10iA robot. Initial commissioning using teach pendant programming took 6 days and left the line down. When a new panel format required a programme change, the team used RoboDK offline programming, creating the new programme in 4 hours and validating it in simulation before downloading to the robot. Line downtime for programme changes dropped from 6 days to 6 hours.

Topics covered

industrial robotskinematicsFANUCKUKAABBcobotROSautomationprogramming

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Mechatronics Engineer →Manufacturing Engineer →Motion Control Engineer →Embedded Software Engineer →

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