SACA C-215 Robotic Systems Study Guide
Based on the "Robotic Systems (PA)" Curriculum
Core Skills 1: Safety (OSHA and ANSI/RIA R15.06)
1. What is the most important concept when working with industrial robots?
o ANSWER ✓ Safety.
2. What is the primary purpose of a hard stop?
o ANSWER ✓ To prevent the robot from over-traveling beyond its working envelope and
crashing into its own mechanical limits.
3. In a FANUC robot system, how is the Emergency Stop circuit typically wired regarding
contacts?
o ANSWER ✓ It is typically wired with Normally Closed (NC) contacts in series. Opening
any E-Stop breaks the circuit.
4. What is the function of a Deadman Switch (Enable Switch) on a FANUC teach pendant?
o ANSWER ✓ It is a three-position switch that must be held in the center position to
enable robot movement when in Teach mode. Releasing or squeezing it tightly stops
the robot.
5. According to standard safety protocols, when must a risk assessment be performed on a
robotic workcell?
o ANSWER ✓ At every stage of the cell's lifecycle: design, installation, commissioning, and
after any major modification.
6. What defines the "Maximum Space" of a robot?
o ANSWER ✓ The space bounded by the maximum limits of each robot axis movement.
7. What is the purpose of safety-rated soft axis limits?
o ANSWER ✓ To create a software-defined barrier that stops the robot if it attempts to
travel beyond a predefined safe boundary, often used to restrict the "Operating Space."
8. When inside the safeguarded area of a robot, what mode must the robot be in?
o ANSWER ✓ The robot must be in Teach / Manual mode with a slow speed limit (typically
250 mm/s or less).
9. Which organization publishes the industrial robot safety standard R15.06 in the United
States?
o ANSWER ✓ ANSI/RIA (American National Standards Institute / Robotic Industries
Association).
, 10. What is the difference between a "safeguard" and a "protective device"?
o ANSWER ✓ A safeguard is a physical barrier (like a fence), while a protective device is an
electro-sensitive device (like a light curtain) that detects entry.
Core Skills 2: Robot Foundations (Setup and Configuration)
11. What is the first major step in creating a new robot application after the mechanical
installation?
o ANSWER ✓ Mastering (or Calibrating) the robot.
12. In FANUC robotics, what is a "Group"?
o ANSWER ✓ A set of axes (joints) that are coordinated to move together, defining a
mechanism (e.g., the robot arm is Group 1, a positioner might be Group 2).
13. What is the purpose of mastering a robot?
o ANSWER ✓ To synchronize the robot's internal position feedback devices (encoders)
with its actual physical position in space.
14. What is the function of a "Payload Setup"?
o ANSWER ✓ To define the weight and center of gravity of the tool (end effector) the
robot is carrying, allowing the controller to optimize servo performance.
15. What is "Mass"?
o ANSWER ✓ The measure of the amount of matter in an object, which remains constant
regardless of gravity.
16. How does "Weight" differ from "Mass"?
o ANSWER ✓ Weight is the force exerted on a mass due to gravity.
17. When setting up a tool, why is it important to know the "Center of Gravity"?
o ANSWER ✓ To allow the robot to accurately calculate the torques required to hold and
move the load without overloading the motors.
18. What is "Inertia"?
o ANSWER ✓ The resistance of an object to a change in its state of motion. High inertia
requires more torque to accelerate or decelerate.
19. Why is proper "Torque" calculation important for robot joints?
o ANSWER ✓ To ensure the robot's motors are not undersized for the application,
preventing premature failure or safety issues.
20. What is the primary reference point for all robot movements?
o ANSWER ✓ The World Frame.
21. How is the World Frame typically defined on a floor-mounted robot?
Based on the "Robotic Systems (PA)" Curriculum
Core Skills 1: Safety (OSHA and ANSI/RIA R15.06)
1. What is the most important concept when working with industrial robots?
o ANSWER ✓ Safety.
2. What is the primary purpose of a hard stop?
o ANSWER ✓ To prevent the robot from over-traveling beyond its working envelope and
crashing into its own mechanical limits.
3. In a FANUC robot system, how is the Emergency Stop circuit typically wired regarding
contacts?
o ANSWER ✓ It is typically wired with Normally Closed (NC) contacts in series. Opening
any E-Stop breaks the circuit.
4. What is the function of a Deadman Switch (Enable Switch) on a FANUC teach pendant?
o ANSWER ✓ It is a three-position switch that must be held in the center position to
enable robot movement when in Teach mode. Releasing or squeezing it tightly stops
the robot.
5. According to standard safety protocols, when must a risk assessment be performed on a
robotic workcell?
o ANSWER ✓ At every stage of the cell's lifecycle: design, installation, commissioning, and
after any major modification.
6. What defines the "Maximum Space" of a robot?
o ANSWER ✓ The space bounded by the maximum limits of each robot axis movement.
7. What is the purpose of safety-rated soft axis limits?
o ANSWER ✓ To create a software-defined barrier that stops the robot if it attempts to
travel beyond a predefined safe boundary, often used to restrict the "Operating Space."
8. When inside the safeguarded area of a robot, what mode must the robot be in?
o ANSWER ✓ The robot must be in Teach / Manual mode with a slow speed limit (typically
250 mm/s or less).
9. Which organization publishes the industrial robot safety standard R15.06 in the United
States?
o ANSWER ✓ ANSI/RIA (American National Standards Institute / Robotic Industries
Association).
, 10. What is the difference between a "safeguard" and a "protective device"?
o ANSWER ✓ A safeguard is a physical barrier (like a fence), while a protective device is an
electro-sensitive device (like a light curtain) that detects entry.
Core Skills 2: Robot Foundations (Setup and Configuration)
11. What is the first major step in creating a new robot application after the mechanical
installation?
o ANSWER ✓ Mastering (or Calibrating) the robot.
12. In FANUC robotics, what is a "Group"?
o ANSWER ✓ A set of axes (joints) that are coordinated to move together, defining a
mechanism (e.g., the robot arm is Group 1, a positioner might be Group 2).
13. What is the purpose of mastering a robot?
o ANSWER ✓ To synchronize the robot's internal position feedback devices (encoders)
with its actual physical position in space.
14. What is the function of a "Payload Setup"?
o ANSWER ✓ To define the weight and center of gravity of the tool (end effector) the
robot is carrying, allowing the controller to optimize servo performance.
15. What is "Mass"?
o ANSWER ✓ The measure of the amount of matter in an object, which remains constant
regardless of gravity.
16. How does "Weight" differ from "Mass"?
o ANSWER ✓ Weight is the force exerted on a mass due to gravity.
17. When setting up a tool, why is it important to know the "Center of Gravity"?
o ANSWER ✓ To allow the robot to accurately calculate the torques required to hold and
move the load without overloading the motors.
18. What is "Inertia"?
o ANSWER ✓ The resistance of an object to a change in its state of motion. High inertia
requires more torque to accelerate or decelerate.
19. Why is proper "Torque" calculation important for robot joints?
o ANSWER ✓ To ensure the robot's motors are not undersized for the application,
preventing premature failure or safety issues.
20. What is the primary reference point for all robot movements?
o ANSWER ✓ The World Frame.
21. How is the World Frame typically defined on a floor-mounted robot?
