# CNC Machine Safety & SOP Guide for Shop Floors
> Essential protocols for CNC machining, including setup, tool maintenance, program verification, and first article inspection (FAI) for quality control.

Tags: cnc-machining, machine-shop-safety, sop, quality-inspection, manufacturing, 5s-housekeeping, first-article-inspection
## Machine Shop SOPs: Essential CNC Protocols
* Overview of mandatory safety and operational procedures for CNC machining environments.

## 1. Pre-Operation Checklist
* Clean machine and remove chips.
* Check oil, air, and coolant levels.
* Run mandatory warm-up cycles and wear PPE (Safety glasses/shoes).

## 2. Setup & Clamping
* Clean fixtures and work surfaces to ensure accuracy.
* Secure clamping to prevent deformation and verify work zero.

## 3. Tool Check & Maintenance
* Match tool numbers to the program.
* Verify sharpness and tool length offsets.
* Replace worn inserts or end mills immediately.

## 4. Program Verification
* Load correct program number and revision.
* Use 'Single Block' or 'Dry Run' modes for initial passes.
* No unauthorized edits to programs allowed.

## 5. Production & Quality Control
* **The First Part Rule:** Inspect and approve the first unit before starting production.
* Monitor dimensions, sounds, and vibration during the run.
* Segregate parts into OK, Rework, and Reject categories.

## 6. Safety & Housekeeping (5S)
* Never touch rotating spindles or use hands to remove chips.
* Stop the machine completely before reaching inside.
* Maintain a clean area (5S) and clear walkways to prevent slips.

## 7. Inspector Guide & FAI
* **First Article Inspection (FAI):** Check all dimensions, tolerances, and surface finishes.
* **In-Process Inspection:** Regular checks at defined intervals to monitor tool wear and dimensional drift.
* **Best Practices:** Use calibrated gauges, measure at room temperature, and zero gauges before use.

## 8. Non-Conforming Part Control
* Identification and segregation of rejected parts.
* Quality ethics: Impartial and honest reporting is mandatory.
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