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CNC

Basics of CNC

CNC machine components and configuration

  • Programable functions and accessories.
  • Directions of motion (axes) and fundamental geometrical principles.
  • Home position (Reference point) for each axis.

Flow of the CNC process

  • Which coordinate systems we have know
  • Machine coordinate system.
  • Setting m/c coordinate system.
  • Direction of motion (axes).
  • Workpiece coordinate system.
  • Definition of workpiece position.
  • Polar coordinates.

Motion types

  • G - codes (preparatory function)
  • M - codes (miscellaneous function)
  • Absolute command (G90).
  • Incremental command (G91).
  • Understanding of interpolation.

Rapid motion

  • Circular interpolation - circular motion (G02 and G03)
  • Other interpolation types
  • Program zero, workpiece zero – positions of zero points.
  • Z axis zero
  • Metric/Imperial dimensions G70, G71, G700, G710

TOOL OFFSETS

  • What are offsets
  • Why we need offsets
  • How to organize offsets.
  • Types of compensation
  • Tool length compensation - G43 (machining centres)
  • How to consider tool length compensation

How to measure tools

  • Cutter radius compensation G40-G42 (machining centres)
  • Reasons for cutter radius compensation
  • How to program cutter radius compensation, example
  • Dimensional tool (wear) offsets
  • Tool nose radius compensation
  • What are other types of compensation

LANGUAGE ELEMENTS OF PROGRAMMING LANGUAGE

  • Address, Data, Word, Block, Sequence, Program ?
  • Types of programs

PROGRAM FORMATING

  • Reasons to format CNC programs
  • Types of program format (program start-up, tool ending, tool start-up, and program ending)
  • Program configuration, structure and contents of an CNC program

LET’S START WRITING CNC PROGRAMS

  • How to Prepare the work piece drawing
  • Steps to prepare (mark up print, machining process, calculate coordinates, selecting of tools, plan setup)
  • How to define machining sequences
  • How to create a machining plan
  • How to translate the work steps into the machining language
  • How to combine all individual steps in a program

CNC TURNING OPERATION

Development in CNC, CNC machining concepts, part programming concepts using G code and M code contour programming, process planning , CNC Tooling, simple part programming on CNC lathe, programming on stock removal, drilling, threading, sub programming, canned cycles, verification of CNC programme by simulation by using SinuTrain 828 Siemens control system. Demo/practical’s on CNC lathe machine operation.


CNC MILLING OPERATION

Development in CNC, CNC machining concepts, part programming concepts using G code and M code contour programming, process planning , CNC Tooling, simple part programming on CNC lathe, programming on stock removal, drilling, threading, sub programming, canned cycles, verification of CNC programme by simulation by using SinuTrain 828 Siemens control system. Demo/practical’s on CNC lathe machine operation.Development in CNC, CNC machining concepts, part programming concepts using G code and M code contour programming, process planning, CNC Tooling, simple part programming on CNC Milling, programming on stock removal, drilling, threading, sub programming, canned cycles, verification of CNC programme by simulation by using SinuTrain 828 Siemens control system. Demo/practical’s on CNC Milling machine operation.

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