CAM902 - CNC Programming - Basic

Outline info
Semester
School
Last revision date 2017-05-29 00:40:05.033
Last review date 2017-07-17 00:16:20.626


Subject Title
CNC Programming - Basic

Subject Description
This subject introduces students to basic CNC programming. Students learn to write basic NC programs, with common 'G' and 'M' codes, using the simulator package to determine the value of the output. This also allows students to read and interpret existing NC files and codes generated by CAM software such as Mastercam. Seneca College provides instruction in a well-equipped computer lab. This subject does not include instruction on machine set-up or basic machining principles.

Seneca College does not provide student copies of any software used in this subject.

Credit Status
One credit toward the Computer Numerical Control (CNC) Programming Recognition of Achievement

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Program CNC controlled milling machines and lathes using common 'G' codes and miscellaneous functions.

2. Edit programs.

3. Describe the advantages and disadvantages of the CNC machining process.

4. Identify milling and lathe machining centres.

5. Describe the binary coded decimal system.

6. Identify the Cartesian Coordinate System.

7. Program CNC machines using point to point programming techniques.

8. Program CNC machines using continuous path programming techniques.

9. Plan programming sequence of operations.

10. Use cutter compensation to compensate for tool diameter and wear.

11. Use tool length offset compensation to compensate for varying tool lengths.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on http://library.senecacollege.ca for further information regarding cheating and plagiarism policies and procedures.

Discrimination/Harassment
All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at student.conduct@senecacollege.ca.

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

Prerequisite(s)
ABP094, MTH100 and one semester of MAC090 or proven industrial experience that includes knowledge of conventional vertical milling maching or faculty approval.

Topic Outline

  •     History of numerical control (NC)
  •     Advantages and disadvantages of NC
  •     Types of NC machines
  •     The binary coded decimal system
  •     Tape codes
  •     The Cartesian Coordinate System
  •     Point to point programming
  •     Continuous path programming
  •     Preparatory functions
  •     Auxiliary functions
  •     Program planning
  •     Linear and Circular interpolation
  •     Cutter compensation
  •     Tool length offset compensation

Mode of Instruction
Hours
39 Hours

Short lectures are provided before each student works on sample programs.

Prescribed Texts
In Class

  •     The CNC Workshop. Frank Nanfara, Tony Uccello, Derek Murphy, Pub. Addison-Wesley. ISBN: 1-58503-083-X
  •     CNCEZ software

Reference Material
None

Required Supplies
None

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D+ 55%  to  59%
D 50%  to  54%
F 0%    to  49% (Not a Pass)
OR
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online (http://www.senecacollege.ca/academic-policy) or at Seneca's Registrar's Offices.


Modes of Evaluation
Assignments

  • Assignments are due at the beginning of the class on which they are due.
  • A late penalty of 10% per day is assessed for late assignments, including those not handed in at the beginning of class when due.
  • Material will not be accepted after one week following the due date and/or when the marked material is returned to students, whichever comes first.
  • Assignments are to be prepared by computer.

Absenteeism and Exams
  • Students should be aware that absenteeism almost guarantees an inability to achieve satisfactory grades.
  • Students who are absent for an examination due to an emergency (e.g., motor vehicle accident, hospitalization or death in the family) may provide official documentation within five days of the missed exam and be provided a deferred exam at a later date.  Official documentation includes a death notice or an original doctor’s certificate identifying the date, length of time expected absence and the specific reason for the absence.  Examinations missed without official documentation and approval result in a grade of zero.
  • There are no deferred options for missed tests.  The value of missed tests, at the discretion of the Faculty, will be added to other evaluation components

English Proficiency
  • All written work should demonstrate the following characteristics for clarity and conciseness:
-writing is consistent with the rules of English grammar
-spelling and punctuation are correct
-sentences are structured correctly
-main ideas are supported with specific, relevant examples and reasons
-work flows logically through supporting statements/paragraphs
-work is arranged in correct format (e.g., as a report, essay)
-up to 10% of the final grade may be deducted on all work if the above English competencies are not met.

Format for Assignments
  • Students must use the standard, APA style for quoting sources.   Help is available at:  http://library.senecacollege.ca

LAB COURSES
Laboratory Attendance
The laboratory component is essential and therefore it is strongly recommended  that you attend all labs.  Any missed labs must be supported with a legal document with three days of the lab.  Any student who fails to attend 2 scheduled laboratory classes for a 7 week subject and more than 3 laboratory classes for a 14 week subject will not pass the subject.    

Laboratory Safety
Students are required to review and understand the safety procedures and guidelines outlined on the first class and sign the sheet to this effect before beginning work in the laboratory.  Students must also wear a lab coat and safety glasses when conducting experiments.
A student who arrives without the proper safety equipment will not be permitted to participant in the lab but will be asked to leave the class.  The student will receive no grade for the lab missed.

Grading is based on the following marking scheme:

In Class
Tests  50%
Assignment 15%
Final Exam 35%
 
Other Evaluation Considerations
The student is expected to comply with the Safety Rules for working in the laboratory, sign the safety contract, and WILL NOT UNDER ANY CIRCUMSTANCES WEAR CONTACT LENSES in the laboratory.  The student will know where all safety equipment is located in the laboratory and will be familiar with WHMIS concepts and signage.

PLEASE RETAIN THIS SUBJECT OUTLINE FOR POSSIBLE FUTURE USE IN SUPPORT OF CREDIT APPLICATIONS AT OTHER EDUCATIONAL INSTITUTIONS

Approved by: Denis Gravelle