ISO 4343:2000

Overview

ISO 4343:2000 (Industrial automation systems - Numerical control of machines - NC processor output - Post processor commands) defines a standardized set of post processor statements for numerical control (NC) software. It specifies the elements of post-processor command type CLDATA records (2000 class and 20 000 class CLDATA records or equivalent) that NC processors and post processors using ISO NC programming languages must be able to produce and accept. The standard deliberately does not prescribe processing mechanisms, recording media, output machine data formats, or statement ordering.

Key Topics and Requirements

• CLDATA record structure: Defines the elements and encoding used for post processor command type CLDATA records (2000 and 20 000 class).
• Language scope: Covers a broad set of post-processor commands across many machining and automation domains, including:
  • Milling and drilling, turning, grinding
  • Die-sinking and wire EDM, flame cutting, laser-beam machining
  • Punching/forming, probing, drafting/plotting
• Coordinate and program references: Addresses part program and machine program references, coordinate systems and units of measure.
• General structure and syntax: Presents the general structure of post processor commands, command grammar rules and keyword lists (normative annexes include syntax rules and a list of keywords).
• Comprehensive command set: Includes commands such as APPLY, CUTCOM, SPINDL, TOOLNO, CYCLE, SELECT, LOAD/UNLOAD and many others tailored for specific process languages.
• Interoperability requirement: Each processor using an ISO NC language must be capable of producing post processor CLDATA records as defined, and each post processor must be capable of using them as input.

Applications

• Standardizes post-processor output from CAM systems to NC controllers, improving interoperability between CAD/CAM software and machine tools.
• Ensures consistent, portable CLDATA records across diverse machining processes (CNC milling, turning, EDM, laser cutting, etc.).
• Supports development of post processors and NC translation tools that must accept and generate ISO-compliant command records.
• Useful in integration projects where consistent NC processor output is required for automated manufacturing lines and industrial automation systems.

Who Should Use This Standard

• CNC and NC controller manufacturers
• CAM/post-processor developers and integrators
• NC programmers and process engineers
• Machine tool builders and systems integrators
• Quality, compliance and standards teams in manufacturing software companies

Related Information

• Normative annexes include rules used in syntax definitions and a list of keywords.
• ISO 4343 complements other ISO standards for numerical control and industrial automation that address programming languages, data formats and machine interfaces.

Keywords: ISO 4343, numerical control, NC processor, post processor commands, CLDATA, CNC, CAM, post-processor, industrial automation, NC programming.