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Language: English Portuguese
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Paper Machine Auxiliary Systems Series (Details)Includes 8 courses for $299/year. Paper Library (Details)Includes 92 courses for $1,499/year.
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Training Time: 23 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese
Sectional drive technology has evolved over the years and advancements in drive and motor designs are continuously being made. Innovations have allowed for increasingly higher machine speeds and production rates. Yet, for all of the advancements in technology, the purpose of sectional drive systems remains the same. That is to give the papermaker a means of controlling the speed and tension of the paper web as it is transferred from one section to another. AC sectional drives are most common on newer machines because of the durability, energy efficiency and affordability of AC motors. This module covers the purpose, types, and operation of paper machine adjustable drives.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What is draw?Draw is the speed difference between the sections of a paper machine and is usually expressed as a percentage.
How do DC drives work?DC drives control the speed of the motor by varying the voltage. A DC motor's speed varies proportionally with the applied voltage.
How do AC drives work?AC drives control the speed of the motor by changing the frequency supplied to the motor. The motor speed is directly proportional frequency.
What are common sectional controls?Each section of the machine usually has run, stop, jog, crawl or slow, slack take-up, and draw controls.
What is a regenerative drive?Under braking conditions, regenerative drives convert mechanical energy of the motor and connected load into electrical energy.
Below is a transcript of the video sample provided for this module:
Paper Machine Drying
View Course
Paper Machine General Safety
Paper Machine Line Shaft Drives
AC Motor Operation and Types
DC Motor Operation
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