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Manufacturing / Industrial • Inspections

CNC Machines Quality Audit

This procedure ensures CNC-cut parts are audited for quality and any deviations are correctly diagnosed and routed to production control, mechanical, or material review as needed.
ABIC
02/06/2026

CNC Machines Quality Audit

This procedure audits CNC-cut part quality and helps route deviations to the right team, distinguishing orientation/program errors, consistent dimensional errors, drift indicating mechanical wear, and random deviation caused by material variability.
Procedure Max Score: 15

    Wrong face / mirrored cuts → Automation / CAM

    What this tells you: ➡Saw is cutting accurately ➡Dimensions are correct ➡Logic/orientation mapping is wrong Typical causes ➡Ranger RS or pick-and-feed orientation logic ➡CAM post-processor assumption ➡Program reference face mismatch What NOT to do ❌ Do not open a mechanical WO ❌ Do not adjust saw Correct action ➡ Route to Production Control ➡ Program or feeder mapping correction ➡ Recut sample to verify

    Wrong dimension, consistent → Program

    What this tells you: ➡Machine is repeatable ➡Axis and tools are stable ➡Wrong value entered Typical causes ➡Incorrect model export ➡Wrong tool offset in program ➡Wrong material thickness assumption What NOT to do ❌ Do not chase mechanics ❌ Do not blame material Correct action ➡ Route to Production Control ➡ Correct values ➡ Verify with one test part

    Drift over parts → Mechanical Inspection WO

    What this tells you ➡Program is correct ➡Orientation is correct ➡Machine cannot hold position Typical causes ➡Axis backlash ➡Servo heating ➡Worn guides or ball screws (Mechanical issue) ➡Clamp wear causing movement Correct action ➡ Auto-generate Mechanical Inspection WO ➡ Check axes, drives, wear points ➡ Lock out if needed

    Random deviation → Material

    What this tells you ➡Machine is fine ➡Program is fine ➡Material variability Typical causes ➡Warped SPF ➡LVL density variation ➡Moisture differences ➡Internal defects Correct action ➡ Tag as Material ➡ Scrap or downgrade ➡ Feedback to supplier if trending

Source: ABIC (Community Member)

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