Читать книгу Student Workbook for Programming of CNC Machines - Ken Evans - Страница 7

Preface

Many textbooks written on the subject of CNC programming include a multitude of practical examples; however, very few include enough practice exercises for readers to verify their understanding. This edition of Student Workbook to Accompany Programming of CNC Machines provides many practical exercises designed to verify comprehension of CNC programming. Although this workbook is written as a companion to Programming of CNC Machines, Fourth Edition, it may be used to confirm anyone’s knowledge of CNC programming. There are many ways to program a part in order to get the accurate results. The proven method offered in the answer key is consistent with the companion text. Most important, the part is produced to specifications, both safely and efficiently.

It is possible for someone to program a CNC machine without actual machining experience. Still, the result will be better if a practical background exists. Feeds and speeds, tool selection, and work holding methods are very hard to learn from a book. Practical experience has been proven to be the best teacher. It is also a plus to have a thorough understanding of shop mathematics. A student who has been taught the basic fundamentals in these matters, beforehand, will have the most success writing CNC programs in the long term.

Units 1 through 4 of this workbook should be used to verify that you have learned the basic skills necessary to write CNC programs, line-by-line, to make a variety of workpieces. The answer key for each unit provides answers/solutions to verify correct programming. Try to complete as many questions and examples as possible without using the answer key. It would be better to use the text (Programming of CNC Machines, Fourth Edition) to look up the required information, rather than go directly to the answers. The text is a reference tool; just like your machinist tools, it was designed to help you get the job done. Whenever it is possible, consult with your trainer for additional ideas or methods to evaluate your work.