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R

Term Definition
RAM

Random Access Memory is the portion of memory with the capability to both read and write information.

Rapid prototyping

A series of approaches to obtaining an initial or prototype of a part or assembly quickly. See, for example, stereolithography.

Real time

The current time or moment when a process or event is occurring.

Real-time system

Use of precise timing in controlling an event typically consisting of multiple changing variables.

Recovery Time

The length of time which it takes a transducer to return to normal after applying a proof pressure.

Redundancy

Duplication to enhance reliability.

Relay

An electromechanical device for remote or automatic control that is actuated by variation in conditions of an electric current. The relay operates other devices in the same or a different circuit.

Relay Ladder Logic

This programming language expresses a program as a series of "coils" and "contacts", simulating the operation of electromechanical relays. The resultant program is the equivalent of a boolean equation, which is executed continuously in a combinatorial manner. The advantage of this language is the familiarity many electricians have with the simple operation of relays. Disadvantages include the complexity of large, cross-connected programs, and the difficulty of expressing such non-binary functions as motion control and analog I/O. An alternative technique now being widely used is State Language control.

Requirements

1) Customers have requirements or needs. If organizations are listening to customers, they will clearly identify customer requirements. The challenge for organizations is to translate these requirements into precise product/service specification. 2) Laws, statutes, rules, procedures, policies, specification, objectives, goals, operating directives, performance standards, etc.

Resolver

A position transducer that uses magnetic coupling to measure absolute shaft position during one revolution.

Rework

Repeated work required when a process fails or standards are missed.

Robotics

The study of the design and use of robots, particularly for their use in manufacturing and related processes.

ROM

Read Only Memory is memory used for system functions without the capability of being rewritten.

Router

A device that operates at the Network Layer of the OSI model (Layer 3) to connect networks of different architecture by resolving the addressing differences between the networks.

RP

Rapid Prototyping

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