Offsets on the CNC Mill

Provided by: ToolingU

"Offsets on the CNC Mill" provides an explanation of the concept, purpose, and use of offsets on the CNC mill or machining center and details the movements and programming involved with each type of offset. The workshift, tool length, and cutter radius compensation (CRC) offsets are essential components of any part program. CNC milling may also use additional offset features, including wear offsets and semi-automatic tool compensation. Programming and operating CNC machines requires an understanding of offsets, since offsets form the foundation of all other tool movements. All CNC processes use offsets.

Course Objectives:

  • Describe offsets
  • Identify machine zero and program zero
  • Describe the three different types of CNC milling offsets
  • Describe workshift offset
  • Describe tool length offset
  • Describe how to set tool length offset
  • Describe workshift offset
  • Describe tool length offset
  • Describe how cutter radius compensation adjusts for cutter size
  • Describe tool wear adjustments
  • Describe automatic tool compensation and machine tool probes.

Recommended Background

  • Recommended for all manufacturing personnel operating CNC machines.

Course ID







Communication, Critical Thinking, Personal Effectiveness, CNC Milling Basics, CNC Programming, CNC Processes

Method of Delivery


Estimated Effort

2 hrs



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