Motor-Driven Timers
When a process has a definite on and off operation, or a sequence of successive operations, a motor-driven timer is generally used (Figure 7– 10 and Figure 7– 11). A typical application of a motor-driven timer is to con- trol laundry washers where the loaded motor is run for a given period in one direction, reversed, and then run in the opposite direction.
Generally, this type of timer consists of a small, synchronous motor driving a cam-dial assembly on a common shaft. A motor-driven timer successively closes and opens switch contacts, which are wired in circuits to energize control relays or contactors to achieve desired operations.
Related posts:
AUDIO AND VIDEO SYSTEMS - LOUDSPEAKERS
AUDIO AND VIDEO SYSTEMS - ELECTRONIC MUSIC SYNTHESIZERS
Field effect transistors (Fets):Enhancement Insulated Gate FETs (MOSFETs)
summary of Integrated Circuits
Programmable Controllers An engineer’s guide - Industrial control with conventional computers
Processing - Digital Electronics
Electronics Explained - Electronic Concepts: More Interesting Than You Think
Power Supply Design:Voltage Regulator Systems
Transformer,three phase:Three-Phase Transformer and Three-phase Transformer Connections.
Transformer:Simplified Diagram
INTRODUCTION TO MACHINERY PRINCIPLES:COMMON TERMS AND PRINCIPLES
OBJECTIVE TESTS ON D.C. GENERATORS.
INTRODUCTION TO NETWORKING WIRED AND WIRELESS
Capacitor-Start Motor Connections