ChabotCollege

Course Outline for Machine Tool Technology 75, Page 1

Fall 2010

ChabotCollegeFall 2010

Course Outline for Machine Tool Techology 75

NUMERICAL CONTROL OPERATOR

Catalog Description:

75 – Numerical Control Operator4 units

(May be repeated 3 times)

Introduction to operating computer numerical controlled drilling and milling machining centers, two-axis lathes, and mill-turn machining centers. Instruction includes the XYZ Cartesian Coordinate system, manual and automatic machining center setup and operation, 2-axis lathe setup and operation, mill-turn machining center setup and operation, basic program editing, run programmed mill and lathe parts, laboratory “first article” inspection, and creating lab inspection reports. 2 hours lecture, 6 hours laboratory.
[Typical contact hours: lecture 35, laboratory 105]

Prerequisite Skills:

None

Expected Outcome for Students:

Upon completion of the course, the student should be able to:

  1. manually set mill tool length offsets;
  2. set mill tool length offsets with touch probes and laser probes;
  3. manually set lathe tool length offsets;
  4. set lathe tool length offsets with touch probes;
  5. set mill fixture offsets;
  6. set lathe fixture offsets;
  7. cutter compensation;
  8. remove and replace lathe collet closers;
  9. remove and replace lathe chuck;
  10. mount and indicate a mill vise;
  11. test run and fabricate programmed CNC parts;
  12. calculate feeds, speeds, and dwell times;
  13. edit CNC part programs on machine controllers;
  14. use the control program editing and math functions;
  15. transfer edited programs from the machine’s control to computer;
  16. use a computer to transfer part programs across a network;
  17. inspect fabricated parts on a coordinate measuring machine;
  18. write a “first article” inspection report for each assigned project.

Course Content (Lecture):

  1. Introduction to Numerical Control
  2. Cartesian coordinates
  3. CNC machine operation and positioning systems
  4. Startup and home positions
  5. Milling machine tool length offsets
  6. Setting manually
  7. Setting with a touch probe
  8. Setting with a laser probe
  9. Part Programs
  10. Canned cycles
  11. Preparatory and miscellaneous codes
  12. Feed and Initial planes
  13. Feed and speed calculations
  14. Loading, testing, and running milling machine programs
  15. Milling machine fixture offsets
  16. Data input using G10
  17. Mounting milling machine work holding devices
  18. Mill vise
  19. Vacuum fixtures
  20. Modular tooling
  21. Introduction to the Coordinate Measuring machine
  22. First article inspection
  23. Lab inspection reports
  24. Milling machine Manual Data Input – MDI operation
  25. Incremental and Absolute programming
  26. Program editing
  27. Machine control math functions
  28. Machine control programming and editing functions
  29. Introduction to conversational milling machine programming
  30. Introduction to contouring
  31. Cutter diameter compensation
  32. Climb and conventional milling
  33. Programming with DXF files
  34. Introduction to lathe programs
  35. Tool nose radius compensation
  36. Canned cycles
  37. Preparatory and miscellaneous codes
  38. Introduction to two axis and mill-turn lathes
  39. Cartesian coordinates
  40. Lathe tooling and accessories
  41. Carbide insert tooling
  42. Lathe tool length offsets
  43. Setting manually
  44. Setting with a touch probe
  45. Setting lathe fixture offsets
  46. Sub spindle operation
  47. Machining center simulator functions and operation

Course Content (Laboratory):

  1. Techniques:
  2. Set milling machine tool length offsets manually and with probing systems
  3. Set milling machine fixture offsets
  4. Edge find parts and fixtures manually and with CNC control routines
  5. Indicating parts and fixtures
  6. Skew machine axes using a touch probe
  7. Proof programs on machine tool simulators
  8. Test run programs
  9. Fabricate programmed parts
  10. Set lathe tool length offsets manually and with probing systems
  11. Set lathe fixture offsets
  12. Create a conversational program
  13. Edit part programs in the CNC mill controller
  14. Inspect parts with a coordinate measuring machine
  15. Inspect parts with manual inspection tools
  16. Safety:
  17. Safe operation of the CNC machining centers
  18. Safe program proofing procedure

Methods of Presentation:

  1. Lecture, informal with student questions encouraged
  2. Powerpoint presentations, videos, instructor created movies, and overhead transparencies
  3. Demonstrations

Assignments and Methods of Evaluating Student Progress:

  1. Typical Assignments
  2. Homework: 1-2 worksheets each week on the material covered in the texts and in lecture.

Examples: Calculate the depths, feeds, speeds, and dwell to spot drill, drill, and tap a series of 1/4-20 UNC - 2B holes..

Write a step by step procedure for mounting and indicating a mill vise. Have it approved by your instructor.

  1. Laboratory assignment: Using your step by step procedure for mounting and indicating a mill vise, properly install and indicate a Kurt mill vise on the Haas machining center.
  1. Methods of Evaluating Student Progress
  2. Homework
  3. Quizzes
  4. Written lab inspection report on each part project
  5. Fabricated parts checked to be accurate size and shape
  6. Midterm examinations
  7. Final examination

Textbook(s) (Typical):

Haas VF2 Mill Programming Manual*

Haas SL-20 Lathe Programming Manual*

*Rationale: Both textbooks are programming manuals for specific equipment in Chabot's Machine Tool Technology lab. They are the standard forall operations and programming functions for our equipment.

Special Student Materials:

  1. Machine shop approved safety goggles
  2. Sharp EL-531W scientific calculator
  3. Plastic circle template, 6” rule, protractor, compass, three inch 30-60° and 45° triangle
  4. USB drive – 1gb minimum
  5. Headphones – 1/8” stereo jack
  6. Combination or keyed padlock

Revised: 9/29/09

Ashley Long/Mike Absher