What is the definition of "part program"?
A series of numerical instructions used by a CNC machine to perform the necessary sequence of operations to machine a specific workpiece.

Learn more about part program in the class CNC Manual Operations 200 below.


CNC Training


Class Information
Tooling U classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:CNC Manual Operations 200
Description:This class describes the control features that allow a CNC operator to execute tasks manually. Includes an Interactive Lab.
Prerequisites: 300110  300140 
Difficulty:Intermediate
Number of Lessons:15
Language:English, Spanish, Chinese

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Below are all the competencies and job programs that contain the class CNC Manual Operations 200. Job programs are our traditional class lists organized according to common job functions. Competencies are our latest job-specific curricula that help tie online learning to practical, hands-on tasks.

Click on any title to view its details.

Class Outline
  • Objectives
  • The Role of the Operator
  • Operator Responsibilities
  • The Machine and Control Panel
  • Machine Controls and CRT
  • Basic CNC Controls
  • Manual Control Modes
  • Manual Control Comparisons
  • CNC Operational Modes
  • MDI and Single Block Mode
  • Types of Override
  • Uses of Overrides
  • Optional Stop and Block Delete
  • Proving Out and Dry Running
  • Summary
  
Class Objectives
  • Describe the role of the operator.
  • Describe the responsibilities of the operator.
  • Distinguish between machine and control panel functions.
  • Describe the function of the CRT.
  • Describe the function of the basic CNC controls.
  • Describe the manual control modes.
  • Distinguish between handle and jog modes.
  • Identify the operational modes.
  • Describe the function of MDI mode.
  • Describe the function of single block mode.
  • Identify the types of overrides.
  • Describe the use of overrides.
  • Describe the role of the operator in optional stop.
  • Describe the role of the operator in block delete.
  • Describe proving out.

Class Vocabulary

Vocabulary TermDefinition
block delete A machine control that provides the option of skipping a predetermined series of program blocks. Block delete allows the operator to run two versions of the same program.
control panel The group of controls on a CNC machine that run, store, and edit the commands of a part program and other coordinate information.
CRT Cathode ray tube. The CRT is the main screen of the machine that displays important information for the operator.
cycle start The control used to begin a program or continue a program that has been previously stopped.
cycle stop The control used to pause a program. Cycle stop pauses tool feed but does not stop spindle movement.
dry running Performing a trial run of the part program without any parts or cutting fluids to check the program.
edit mode The mode that allows an operator to make changes to a part program and store those changes.
emergency stop The control that automatically shuts down all machine functions.
feedrate override An override that allows the operator to adjust the feed rate of the tool during operation. The override functions as a percentage of the programmed value.
handle mode The mode that allows for the manual operation of tool movement via the handwheel. Some machines may have a combined handle/jog mode.
jog mode The mode that allows for the manual operation of tool movement via the jog buttons. Some machines may have a combined handle/jog mode.
machine panel The group of controls on a CNC machine that directly guides tool movement and the operation of machine components.
machine zero The position located at the farthest possible distance in a positive direction along the X-, Y-, and Z-axes. This position is permanently set for each particular CNC machine.
manual data input mode The mode that allows an operator to manually enter and execute blocks of programming code at the control panel.
memory mode The mode that allows an operator to call up and execute a part program stored in the machine.
micrometer A hand-held measuring device used to inspect the dimensions of parts. The typical micrometer is accurate within 0.001 in. or 0.02 mm.
mode A machine state that determines the way it executes manual and automatic commands.
optional stop A code that pauses the program if the appropriate switch is selected on the machine. Optional stops allow the operator to inspect the machine between operations.
override A control that adjusts a programmed speed or feed rate by a certain percentage during operation.
part program A series of numerical instructions used by a CNC machine to perform the necessary sequence of operations to machine a specific workpiece.
part programmer The person responsible for the creation of a part program. The part programmer translates the workpiece design into program instructions for the CNC machine.
proving out Running a program one block at a time in order to check for accuracy and proper tool setup.
rapid feedrate override An override that allows the operator to reduce the rate of rapid tool movement during operation. A rapid override may be 25% of the original rate or less.
rapid mode The mode that allows for the manual movement of machine components at high rates of travel.
single block mode The mode that allows an operator to execute a part program one block at a time. The operator must push the cycle start button to execute each block.
soft key A panel key that can execute a variety of different commands. The purpose of the key depends upon the current display on the CRT.
spindle speed override An override that allows the operator to adjust the speed of the spindle during operation. The override functions as a percentage of the programmed value.
tolerance The unwanted but acceptable deviation from a desired dimension.
tool offset A stored value that compensates for variations in tool length. Each tool requires an offset, which is measured from the turret or spindle position.
zero return The control that automatically locates the turret or spindle in the machine zero position.