Fanuc 15T

The following MasterTask lesson outline indicates the tasks needed to act as a CNC Lathe and CNC Turning Center operator and set up operator on Fanuc 15T controlled machinery. Because of the performance-based approach to training utilized within MasterTask systems, the outline below indicates what a trainee will be able to DO after completing each part of a lesson. Some of these tasks require the trainee to explain how something works to insure they have the required understanding of the processes and are not simply memorizing procedures. All of the tasks listed will be a part of the Performance Test within each lesson. To learn more about these tests and the training process itself, see the Philosophy section.

Lesson 1: Primary Components and Controls [ Top ]

After completing this lesson the operator will be able to:

  1. Explain how the CNC control directs the movements of the lathe
  2. Locate and name the basic components of a lathe equipped with a 15T CNC control.
  3. Jog the turret in each axis and identify locations on the lathe within the coordinate grid using sign and axis designations.
  4. Use the Soft Keys or Operator keys to display certain screens and move the Cursor within those displays.
  5. Identify and explain the purpose of the basic controls found on the Operator Control panel.
  6. Turn on the main power, the power to the control, and inspect the operation and lubrication systems prior to operation.

Lesson 2: Lathe Operation and Quality Control [ Top ]

After completing this lesson the operator will be able to:

  1. Identify and explain the purpose of the Machine Reference Point within the coordinate grid and perform a manual Reference Point Return operation.
  2. Prepare the CNC control for operation by setting operating switches to their correct position as called for in the setup documentation.
  3. Execute a part program to complete the machining of a workpiece.
  4. Remove and reload workpieces in the machine and reset the part program.
  5. Use the Override and Feed Hold controls to safely machine workpieces.
  6. Inspect workpieces to identify chatter marks and explain how to correct these and other surface-finish problems.
  7. Measure features and compare to print dimensions to identify worn tooling conditions.

Lesson 3: Reading Program Information [ Top ]

After completing this lesson the operator will be able to:

  1. Display part program screens and identify program numbers.
  2. Locate and identify blocks and sequence numbers within a program.
  3. Locate and explain the purpose of G, M, T, F, S and end-of-block codes, and various parts of a part program.
  4. Explain the effect of modal and non-modal codes on programming and operation.
  5. Locate and identify tool paths and explain the effect of absolute and incremental programming and how these modes are established.
  6. Identify when the machine may exhibit linear or non-linear G00 movement paths.
  7. Display and explain the purpose of the Relative, Absolute, Machine, and All position displays.

Lesson 4: Wear Offsets, Loading and Editing Programs [ Top ]

After completing this lesson the operator will be able to:

  1. Calculate and determine the axis and sign of corrections to Tool Wear offsets to correct out of tolerance features.
  2. Enter Tool Wear offsets for the correct tool number.
  3. Safely jog the turret to inspect tool inserts.
  4. Locate and identify different types of tool wear and damage.
  5. Replace tool inserts, machine workpieces and adjust offsets accordingly.
  6. Make active a program in memory.
  7. Delete unused part programs from memory.
  8. Load part programs from punched tape using a tape reader.
  9. Enter approved edits into a part program using Search, Insert, Alter and Delete functions.

Lesson 5: Work Holding Devices [ Top ]

After completing this lesson the operator will be able to:

  1. Remove an existing set of chuck jaws and properly mount new jaws for the workpiece to be machined.
  2. Select the correct size ring or plug gauge for machining the jaws.
  3. Calculate the length of cut required for proper workpiece holding.
  4. Manually start the spindle, ink jaws, then use the Handle and Jog controls to turn chuck jaws.
  5. Remove and replace collet chuck pads or a master collet.
  6. Change a center, and position the tailstock and identify tailstock commands.

Lesson 6: Tool Installation and Tool Nose Offsets [ Top ]

After completing this lesson the operator will be able to:

  1. Identify where and how turning tools are to be installed from the setup documentation.
  2. Identify where and how drills are to be installed from the setup documentation.
  3. Correctly install all turning tools and end working tools for a setup.
  4. Locate and explain the function of tool nose radius compensation commands in a part program.
  5. Clear unnecessary tool offsets and enter tool tip and tool nose radius compensation values required for the setup.

Lesson 7: Establishing Program Zero, Geometry Offsets, and Safe Index [ Top ]

After completion of this lesson, the Operator will be able to use one of two methods to establish program zero and the safe index point.

G50-Method Tasks

  1. Locate within a part program the blocks which start and stop a tool path and identify the Reference Tool.
  2. Locate and explain the coordinates which represent the location of the Safe Index Point from Machine Zero.
  3. Locate the blocks which establish program zero when the G50 method is used.
  4. Cancel appropriate tool Geometry and Wear offsets, enter new offsets and select a reference tool.
  5. Manually machine a workpiece, measure, and establish Program Zero for the job.
  6. Establish the Safe Index Point and edit the coordinates into the part program as required.
  7. Find the Machine Zero to Safe Index coordinates and edit them into a sub program if appropriate.
  8. Replace a broken or worn tool and safely remachine a tool path.

Offsets-Method Tasks

  1. Clear Geometry and Wear offsets and establish a new Geometry offset for each tool.
  2. Manually machine a workpiece, measure, and establish program zero for the job.
  3. Establish the Safe Index Point and edit the coordinates into the part program as required.
  4. Find the Machine Zero to Safe Index coordinates and edit them into a sub program if appropriate.
  5. Replace a broken or worn tool and safely remachine a tool path.

Lesson 8: Machining the First Workpiece [ Top ]

After completing this lesson the operator will be able to:

  1. Safely Dry Run the program to detect problems if required in your shop.
  2. Calculate and input trial offsets to eliminate scrapping first piece if required.
  3. Properly adjust coolant lines.
  4. Determine from the program whether the slash code, M00, or M01 command is used, and set the operating switches accordingly.
  5. Safely trial run in single block mode.
  6. Measure workpiece features and determine if adjustment of offsets or coordinates is required at the end of each tool path.
  7. Add or subtract signed numbers in order to calculate changes in tool offsets or coordinates to bring features to nominal size.

Lesson 9: Circular Interpolation and Drilling, Grooving, Tapping and Boring Canned Cycles [ Top ]

After completing this lesson the operator will be able to:

  1. Locate and explain the programming associated with circular interpolation including direction of cut, start point, end point, center point or radius.
  2. Explain the information needed to produce arcs and radii when using G02 and G03.
  3. Locate and explain the programming associated with the initial point, safety plane, rate of tool movement, depth of hole, and dwell in the G83 and G87 drilling canned cycles.
  4. Locate and explain programming associated with the initial point, depth of cut, plunge depth, relief, and tool shifts in the G74 and G75 grooving canned cycles.
  5. Locate and explain programming associated with right or left hand threads, tap depth, and explain operation control overrides and the cause of flat thread crests in the G84 and G88 tapping canned cycle.
  6. Locate and explain programming associated with call cycle, depth of bore, and R plane in the G85 and G89 boring canned cycles.

Lesson 10: Turning, Facing and Threading Canned Cycles [ Top ]

After completing this lesson the operator will be able to:

  1. Locate and identify the command words used to program threading with a G32 command including threads per inch, start point, and number of passes.
  2. Locate and identify the command words used to program threading with a G92 or G78 canned cycle including start point and number of passes.
  3. Locate and identify the command words used to program threading with a G76 canned cycle including thread length, thread height, taper control, depth per pass, threads per inch and identify those addresses which may be safely edited to control thread features.
  4. Use thread measuring instruments to identify out of tolerance threads, and determine correction values.
  5. Locate and identify the command words used to program a G90 or G77 turning canned cycle including initial point, turned length, end point and taper control.
  6. Locate and identify the command words used to program a G72 or G94 facing canned cycle including initial point, turned length, end point, and taper control.
  7. Locate and identify the command words used to program profile turning with a G71 and G70 canned cycle including initial point, finishing allowance, and depth per pass.
  8. Locate and identify the command words used to program profile turning with a G71 and G70 canned cycle including initial point, finishing allowance, and depth per pass.