SACA Industrial Robot Operations 2

Question 1

What are the degrees of freedom (DOF) of a standard 6-axis industrial robot, and what does each axis typically control?

Accepted Answer

6 DOF: 3 for position (X,Y,Z) and 3 for orientation (roll, pitch, yaw) — enabling the TCP to reach any point in space at any angle

Answer

A 6-axis robot uses the first 3 axes to position the wrist center point in 3D space (waist rotation, shoulder rotation, elbow rotation) and the last 3 wrist axes to orient the tool (roll/pitch/yaw) — providing full 6-DOF capability.

Question 2

What is 'tool change' capability in industrial robotics, and what device enables automatic tool switching?

Accepted Answer

An automatic tool changer (ATC) — a mechanism allowing the robot to exchange end-effectors from a rack without human intervention

Answer

An automatic tool changer (ATC) consists of a master plate on the robot flange and tool plates on each end-effector at a tool rack. The robot drives the master plate onto a tool plate, locks it, disconnects air/electrical/signal utilities from the previous tool, and connects them to the new tool — all automatically.

Question 3

In robot programming, what is the difference between 'MOVJ' (joint motion) and 'MOVC' (circular motion)?

Accepted Answer

MOVJ moves the TCP along the shortest joint-space path (curved in Cartesian); MOVC moves the TCP along a circular arc through three defined points

Answer

MOVJ (joint interpolation) moves all joints simultaneously, resulting in the fastest but unpredictable TCP path shape. MOVC (circular interpolation) controls the TCP along a smooth circular arc defined by start, via, and end points — required for welding circular seams or dispensing adhesive on curved paths.

Question 4

What is a 'safety-rated monitored stop' in collaborative robot applications?

Accepted Answer

A robot safety function that monitors for human presence and commands the robot to stop and hold position if a person enters the collaborative workspace

Answer

Safety-rated monitored stop (SRMS) uses safety-rated presence detection (safety scanner, light curtain, or proximity sensor) — when a human enters the monitored zone, the robot decelerates to a safety-rated stop and holds position, resuming automatically when the human leaves.

Question 5

What is 'palletizing' in industrial robotics and what robot configuration is typically preferred for this task?

Accepted Answer

Stacking products onto pallets in defined layer patterns; preferred robot: high-payload, large-reach articulated robot or dedicated palletizing robot (4-axis)

Answer

Palletizing places boxes, bags, or cases onto pallets in structured layer patterns to maximize pallet density and stack stability. Dedicated palletizing robots (FANUC M-410, Kuka KR QUANTEC PA) are optimized for high payload (100-1000kg), large reach, and fast layer-building cycle times.

SACA - Smart Automation Certification Alliance Practice Test

SACA - Smart Automation Certification Alliance Practice Test

SACA Industrial Robot Operations 2