Chabot College
November 1999
Replaced Fall 2010
Course Outline for Machine Tool Technology 71A
NUMERICAL CONTROL PROGRAMMING I
Catalog Description:
71A – Numerical Control Programming I
(May be repeated 3 times)
4 units
Introduction to programming and operating three axis computer numerical controlled drilling and
milling machines. Instruction includes the standard X-Y-Z Cartesian coordinate system, manual and
automatic milling machine operation, absolute and incremental positioning, tape coding and
preparation, and fabrication of basic and intermediate three axis drill and mill parts. Prerequisite:
Computer Science 8 or Computer Application Systems 8. Strongly recommended: Industrial
Technology 74 (may be taken concurrently). 2 hours lecture, 6 hours laboratory.
[Typical contact hours: lecture 35, laboratory 105]
Prerequisite Skills:
Before entering the course the student should be able to:
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identify various parts of a computer system and what each does;
identify major software applications packages and what they do;
know how to use common features of windows and the desktop;
know how to organize files and folders using Windows Explorer;
be familiar with features common to Windows Software;
know what the internet is, what a browser is, and be able to navigate the internet;
know what the World Wide Web is and how to use search engines;
know how to send, receive, and manage electronic mail;
identify ethical and security issues;
demonstrate significant digits and their relationship to measurements;
use a calculator to perform arithmetic operations involving measurements;
perform numerical evaluation of formulas and solve simple linear equations;
demonstrate the concept of ratio and solve proportions;
demonstrate numerical trigonometry, polar coordinates, and perform elementary calculations;
perform conversions between English and Metric measurements;
calculate volumes and areas.
Expected Outcomes for Students:
Upon completion of the course, the student should be able to:
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demonstrate the basic concepts of the Cartesian coordinate system;
compare cutter location coordinates using basic trig functions;
prepare basic three axis numerical control programs;
use computer software to prepare N/C machine control tapes;
set up and run basic three axis computer numerical control drill and mill programs.
Course Content
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Introduction to numerical control machine tools
Cartesian coordinates
Absolute and incremental positioning
Program format, codes, and style
Canned cycles
Chabot College
Course Outline for Machine Tool Technology 71A, Page 2
November 1999
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Polar coordinate programming
Simple looping operations
Basic subroutine programming
Contour milling
Cutter compensation
Manual data input (M.D.I.) operation
Methods of Presentation:
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Lecturing
Machine demonstrations
Video aids
Visual aids
Production of programs and parts
Assignments and Methods of Evaluating Student Progress:
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Homework assignments – read specified section and answer questions
Laboratory Projects – follow established procedure and program and machine assigned parts
Exams
Short quizzes
Attendance
Textbook(s) (Typical):
Bridgeport Programmers/Operators Manual, Bridgeport Machine Tool Company
Fadal Programmers/Operators Manual, Fadal Machine Tool Company
Computer Numerical Control from Programming to Networking, Lin, Jonathan S.C., Delmar
Publishing Company, 1994
Special Student Materials:
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Scientific calculator
Plastic circle template
One 45 degree and one 30-60 degree plastic triangle
One 6 inch scale
Protractor
Compass
PC formatted diskette
Safety glasses
mc 12/8/99
COMT71A