CNC Programmer Trade Career Profile

ROLE OVERVIEW:
CNC Programmers write, optimize, and test G-code and M-code programs that control automated lathes and milling centers.

SKILLS REQUIRED:
- Writing G-code and M-code part programs manually
- Generating toolpaths using CAD/CAM software
- Choosing cutting speeds, feed rates, and depth parameters
- Setting coordinate systems and offset datums

TOOLS USED:
- Computers with Mastercam, Delcam, or AutoCAD software
- CNC controllers (Fanuc, Siemens, Haas, Mazak)
- 3D simulation packages and dimensional measuring instruments

GROWTH PROSPECTS:
Premium machining specialization with fast salary increments.

INTERVIEW QUESTIONS:
1. Q: What is the difference between absolute coordinate system (G90) and incremental coordinate system (G91)?
A: G90 coordinates are measured from a fixed origin (part zero); G91 coordinates are measured from the tool's current position.
2. Q: Explain the G00 and G01 G-codes.
A: G00 commands rapid tool positioning at maximum speed; G01 commands linear feed interpolation at a specified cutting speed.