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CNC Mill Setup & Operation Flashcards

7 cards from real CNC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 CNC Mill Setup & Operation flashcards as text

  1. When indicating a vise jaw parallel to the X-axis on a CNC mill, which tool is most commonly used?

    Answer: Dial test indicator (DTI)

    A dial test indicator is swept along the jaw face while adjusting the vise until runout is within tolerance.

  2. A CNC milling program calls G43 H02. What does H02 specify?

    Answer: The tool length offset register 2

    G43 activates tool length compensation and H02 selects the value stored in offset register number 2.

  3. Which G-code cancels cutter radius compensation (CRC)?

    Answer: G40

    G40 cancels cutter radius compensation, while G41 is left compensation and G42 is right compensation.

  4. What is the purpose of a pecking cycle (G83) in CNC milling?

    Answer: Drill deep holes with periodic chip-clearing retracts

    G83 is the deep-hole peck-drilling cycle that retracts to the R-plane between each peck to clear chips and allow coolant penetration.

  5. On a Fanuc-style control, what does the address F represent in a milling program?

    Answer: Feed rate in inches or mm per minute (or per revolution)

    The F word specifies feed rate, interpreted as per-minute (G94) or per-revolution (G95) depending on the active feed mode.

  6. Which of the following best describes 'climb milling'?

    Answer: The cutter rotates in the same direction as the table feed

    In climb milling the cutter teeth move in the same direction as the feed, resulting in a chip that starts thick and thins, generally producing better surface finish.

  7. What is the function of the 'dry run' mode on a CNC mill control?

    Answer: Overrides all feed rates to a rapid-like speed for program verification without cutting

    Dry run mode substitutes the programmed feed rates with a manually set rapid-style rate so operators can verify tool paths without engaging the workpiece.