Robotics Chapter 5,6,7

Product planning that considers the robots that will assemble a product is ____.

designing for manufacturability

The relationship of the ____ to work fixtures must be taken into account when designing a work station.

end effector

Greater flexibility may be achieved by mounting a robot on the ____ within the work envelope, instead of the floor.

Both A and B.

The work envelope is defined by the type of joints a robot is equipped with and its ____.

degrees of freedom

The six possible degrees of freedom can be broken into two categories: body and ____.

wrist

The smallest incremental movement a robot can make is called ____.

resolution

The accuracy of movement of a robot’s tool tip is described in terms of ____.

spatial resolution

The ____ is how precisely the end effector is programmed to reach a predetermined point.

accuracy

The variation in movement that occurs when an action or task is performed several times is described as ____.

repeatability

The ____ of a robot describes how fast it can accelerate, decelerate, and come to a stop at a given point.

Both B and C.

The maximum weight of material a robot is capable of handling on a continuous basis is the ____.

payload

A robot’s ability to provide precise points in the process of accurately locating parts is described as ____.

fixturing

Robots used for ____ are generally small and designed to move small parts accurately at high speeds.

assembly work

Automated guided vehicles (AGVs) use a ____ for navigation.

All of the above.

____ robots are mobile and can move to a work area to perform necessary tasks.

Service

Minimizing the number of parts required for a product makes assembly more complex.

False

Plans to provide a safe working environment are considered only after a robotic system is designed and installed.

False

Work station design should place control panels outside the robot’s work envelope.

True

Robots with six degrees of freedom can work anywhere within the work envelope.

True

Resolution expresses how precisely a robot’s hand is programmed to reach a predetermined point.

False

As speed increases, accuracy decreases.

True

A robot’s load-handling capacity is reduced when its boom is fully extended, compared to when the boom is retracted.

True

Injection molding is an example of a pick-and-place operation.

False

It is easier to correct issues with inaccuracies than issues with repeatability.

True

Continuous-path programming must be used for robotic spray operations.

True

Service robots are mobile and can move to the work area to perform the necessary tasks.

True

Force-sensing equipment can identify contact with a workpiece and adjust tools for constant pressure.

True

Engineering products with the robots that will assemble them in mind is called ______________________________.

designing for manufacturability

An automated device that is designed to perform only one function is ______________________________.

dedicated equipment

Safety devices that prevent unauthorized access to hazardous areas are ______________________________.

interlocks

The ______________________________ is different for each robot configuration and is defined by its type of joints and degrees of freedom.

work envelope

The closest distance between movements of a robot is ______________________________.

command resolution

Spatial resolution takes into account command resolution and ______________________________.

mechanical inaccuracy

The two most important factors that influence operational speed are the desired accuracy and ______________________________.

payload

In ______________________________ operations, robots remove and quench casted metal parts.

die casting

Robots used for spot welding typically have __________________________ or more axes of motion, which allow them to approach the weld at any angle.

six

Robots used in machining processes have a high degree of ______________________________.

repeatability

Robotic inspection systems consist of two subsystems: one accumulates data and the other ___________________ data and presents it in a meaningful way.

analyzes

Up and down motion.

Elbow

Movement about a vertical axis

Waist

Side-to-side movement of the wrist

Yaw

Rotation of the wrist

Roll

Extension and retraction of the arm

Shoulder

Up and down movement of the wrist

Pitch

Riveting

Machining processes

Palletizing

Pick-and-place

Mobile security robot

Service

Apply sealant

Spray operations

Stamping

Machine loading and unloading

Fastening parts together

Assembly

A combination of components that work together to form a unit is a(n) ____.

system

A(n) ____ system transfers power from one point to another through mechanical motion that is used to do work.

electromechanical

When subsystems are combined, the result is referred to as a ____.

synthesized system

The process of converting alternating current power to direct current is called ____.

rectification

____ devices operate within the transmission path and alter the flow of power.

Control

The ____ is a subsystem that displays information about operating conditions at points throughout the system.

indicator

Control in mechanical systems is accomplished by changing ____.

All of the above.

In electrical systems, a ____ system signals a response to a particular form of energy.

sensing

A(n) ____ system provides a lapse in time before the load device becomes energized.

delay timing

The ____ unit of an industrial robot determines its flexibility and efficiency.

control

In a closed-loop system, the signal or data that provides information about interaction between the control unit and the load is called ____.

feedback

The ____ compares the feedback signal from the controlled element to a reference signal or standard.

comparator

The rotary motion, or turning force, of an electric motor is called ____.

torque

The ____ is the rotating component of a motor and includes the armature, shaft, and associated parts.

rotor

The coil wires wrapped around the electromagnets in the stator are called ____.

field windings

As the mechanical load on a dc motor increases, the motor speed ____.

decreases

A ____ dc motor has two sets of field windings.

compound-wound

A ____ motor has a solid rotor, called a squirrel cage rotor.

single-phase induction

The difference between the synchronous speed and the rotor speed is called ____.

slip

____ systems are machines that change the position or speed of a mechanical object in response to system feedback.

Servo

A(n) ____ motor is comprised of a rotor and a stator assembly, and contains no brushes, commutators, or slip rings.

synchronous

DC stepping motors are primarily used to change electrical pulses into ____.

rotary motion

Work occurs when energy is transformed into mechanical motion, heat, light, chemical action, or sound.

True

The most common source of power for synthesized systems is alternating current (ac).

True

Single-phase ac power consists of three alternating currents that vary by 120°.

False

Examples of loads include digital meters, pressure gauges, tachometers, and thermometers.

False

The transmission path provides a channel for the transfer of energy.

True

In a mechanical system, control is accomplished by changing pressure, direction, force, and speed.

True

Timing systems convert electrical energy into mechanical motion.

False

Open-loop control systems use sequencers and mechanical stops to control the end point positions of the robot arm.

True

A digital system is a set of components that work together to process numeric information.

True

In an electric motor, the armature is an electromagnet.

True

The counter electromotive force flows against the voltage coming into a dc motor.

True

Horsepower is a measure of the amount of current produced over a specified amount of time.

False

In a series-wound dc motor, the armature and field circuits are connected in a series arrangement.

True

In bifilar construction, three separate wires are simultaneously wound into the stator coil slots.

False

In a mechanical system, ______________________________ measure physical quantities, such as pressure, speed, and force.

indicators

The ______________________________ of a sensing system outputs a signal that is used to control the load device.

detector

The ______________________________ receives data from both the input source and the output device, and determines if a correction signal should be sent to the actuator.

error detector

A(n) ______________________________ motor is the only dc motor that can also be operated using ac power.

universal

______________________________ occurs when energy is transformed into mechanical motion, light, heat, chemical action, or sound.

work

In an automated system, the part(s) designed to produce work is referred to as the ______________________________.

load

______________________________ timing systems may include both interval and delay timing to provide energizing action in an operational sequence.

cycle

Flexible, fiber-optic rods that transfer light energy from its source to distant locations are called ______________________________.

light pipes

As the armature of a dc motor rotates, it generates its own voltage called ______________________________.

counter electromotive force

The ______________________________ rating of a motor represents the power of the motor.

horsepower

Examples of ______________________________ in automated systems include electric motors, heating systems, lighting systems, alarms, and mechanical actuators.

loads

A(n) ______________________________ open-loop system simply turns the system off or on.

full control

The ______________________________ is the rotating part of a motor that creates torque.

rotor

Changes in the field current result in corresponding changes in the ______________________________ of the electromagnetic field.

flux