Programming Exercise 3-19 Answer
CNC Turning Center Combined Projects Answers
Programming Exercise 3-20 Answer
CNC Turning Center Program Error Diagnosis Answers
ANSWERS TO UNIT 4: CNC MACHINING CENTER PROGRAMMING
CNC Machining Center Tool List
Identifying Programming Coordinates for Milling Answers
Linear Interpolation on the CNC Machining Center
Face Milling Answers
Programming Exercise 4-1 Answer
Programming Exercise 4-2 Answer
Contour Milling Answers
Programming Exercise 4-3 Answer
Circular Interpolation Answers
Programming Exercise 4-4 Answer
Programming Exercise 4-5 Answer
Circle Milling Answers
Programming Exercise 4-6 Answer
Cutter Diameter Compensation Answers
Programming Exercise 4-7 Answer
Programming Exercise 4-8 Answer
Programming Exercise 4-9 Answer
Programming Exercise 4-10 Answer
Canned Cycles Answers
Programming Exercise 4-11 Answer
Programming Exercise 4-12 Answer
Programming Exercise 4-13 Answer
Programming Exercise 4-14 Answer
CNC Machining Center Combined Projects Answers
Programming Exercise 4-15 Answer
CNC Machining Center Subprogram Application Answers
Programming Exercise 4-16 Answer
Programming Exercise 4-17 Answer
CNC Machining Center Program Error Diagnosis Answers
INDEX
Acknowledgments
I give thanks first to the Lord, Our God, for blessing me with the opportunity, knowledge, and ability to share in this work. Many thanks are due to all of the parties listed below, who helped on this project. Special thanks are due to the publisher, Industrial Press, including President Alex Luchars; Managing Editor, Laura Brengelman; former Editorial Director, John Carleo; and Production Manager, Janet Romano.
Thanks to Robert Weinstein, Editor, of Gerson Publishing Company, for his efforts in editing this text.
Thanks as well to:
• T.J. Long; Katie Richardson, and Larry Meenan of Kennametal for their assistance and contribution of tooling graphics and other technical data from the NOVO online application.
• Greg Mercurio of Shop Floor Automations for allowing the use of Predator Virtual CNC software for program verification in the previous edition.
• Carr Lane Manufacturing for technical data charts.
About the Author
Ken Evans has held diverse machining and related jobs throughout his career and is currently a CNC Programmer at a prominent aerospace company. He learned the machinist trade in 1976 at Cessna Aircraft in Wichita, Kansas. Evans began his formal teaching career in 1984 at the T.H. Pickens Technical Center in Colorado, while working full-time as a CNC machinist and quality control inspector.
From 1991 to 2010, he served as a Machine Tool Technology instructor at Davis Applied Technology College in Kaysville, Utah, teaching foundational through advanced-level courses in the machining curriculum, including Mastercam CAD/CAM classes for students, educators, and private industry. He also was designated a certified Project Lead the Way, Computer Integrated Manufacturing (CIM) instructor. From 1997 to 2003, Ken worked for a local machine tool distributor in Salt Lake City as a MAZAK certified Training and Applications Specialist and one of the nation’s first Mazatrol Conversational Programming instructors.
Ken loves the outdoors; he enjoys gardening, mountain biking, and golf.
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
