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BytesAgain β€Ί Skills β€Ί pikoCNC G-CODE
πŸ¦€ ClawHub

pikoCNC G-CODE

by @midware

Interprets and executes full PikoCNC G-code commands with modal state tracking, motion control, parameter handling, and error detection for CNC machining.

Versionv1.0.0
Downloads326
#clawhub
TERMINAL
clawhub install pikocnc

πŸ“– About This Skill

PikoCNC G-Code Full Skill (Complete Implementation-Oriented)

PURPOSE

This document represents a complete, implementation-oriented skill for PikoCNC G-code. It includes:
  • Full command coverage (based on manual)
  • Modal state model
  • Execution rules
  • Examples per command
  • Interpreter-ready structure

    • 1. MACHINE STATE MODEL

    Modal Groups

  • Motion: G0, G1, G2, G3
  • Units: G20, G21
  • Cycle: G80, G81
  • Scaling: G51

    • State Variables

  • Position: X, Y, Z
  • Feed rate: F
  • Spindle: S
  • Motion mode
  • Unit mode
  • Active cycle
  • Scaling factor
  • Tool number

    • 2. PROGRAM STRUCTURE

    Start / End

    % ... M30

    Comments

    ( comment ) ; comment ' comment

    3. CORE COMMANDS

    G0 – Rapid

    G0 X10 Y10

    G1 – Linear

    G1 X20 Y20 F100

    G2 – CW Arc

    G2 X20 Y20 I5 J0

    G3 – CCW Arc

    G3 X20 Y20 I-5 J0

    Rules

  • I/J relative to start point
  • R optional (alternative)
  • Do not mix I/J with R

    • 4. UNITS

    G20 – Inches

    G20

    G21 – Millimeters

    G21

    5. DWELL

    G4

    G4 P2

    6. HOMING

    G28

    G28

    G30

    G30

    7. DRILLING

    G81

    G98 G81 X10 Y10 Z-5 R2 F100

    Cancel

    G80

    8. SCALING

    G51

    G51 I1.5 G51 I1.5 X10 Y10

    9. PARAMETERS

    F100 S1000

    10. M-CODES

    M0 M3 S1000 M4 M5 M6 T1 M8 M9 M10 M11 M30

    11. TOOL CHANGE EXECUTION

    M6 triggers: 1. M6_beg 2. M6_put 3. M6_get 4. M6_mess 5. M6_end

    12. MODAL RULES

  • Motion persists
  • Feed persists
  • Units persist

    • Example: G1 X10 Y10 X20 Y20

    13. NON-MODAL

  • I
  • J
  • R

    • 14. EXECUTION ENGINE (INTERPRETER LOGIC)

    Step Processing

    1. Parse line 2. Update modal state 3. Execute motion 4. Apply parameters

    Motion Execution

  • G0: instant move
  • G1: linear interpolation
  • G2/G3: arc interpolation

    • 15. ERROR HANDLING

  • Missing parameters β†’ error
  • Invalid arc definition β†’ error
  • Unknown command β†’ ignore or error

    • 16. SAFE PROGRAM TEMPLATE

    % G21 G0 Z5 G0 X0 Y0 G1 Z-1 F100 G1 X50 Y0 G1 X50 Y50 G1 X0 Y50 G1 X0 Y0 G0 Z5 M30

    17. BEST PRACTICES

  • Always set units
  • Always retract Z before rapid XY
  • Avoid mixing arc definitions
  • Reset states when needed

    • 18. IMPLEMENTATION NOTES

    To build interpreter in C#:

  • Lexer β†’ tokenize line
  • Parser β†’ command objects
  • State machine β†’ modal tracking
  • Executor β†’ motion simulation

    • SUMMARY

    This file provides:

  • Full command coverage
  • Execution semantics
  • Interpreter-ready structure

    • It can be used for:

  • CNC programming
  • G-code validation
  • Simulator development

    • πŸ”’ Constraints

  • I/J relative to start point
  • R optional (alternative)
  • Do not mix I/J with R

    • 4. UNITS