Week 7 — Computer-controlled machining

This week’s topic: Computer-controlled machining.

Group assignment

In Shenzhen Chaihuo, we documented a complete wood-CNC operating sequence and safety routine for panel machining. The purpose was to reduce crashes from coordinate mismatch, weak workholding, and unsafe intervention during spindle motion.

Work objective

We organized the workflow as one coherent chain: load code, place stock, clamp, change tool, close guard, set zero, and run under supervision. Each step includes the failure it prevents.

1) Machine context and preparation

The group operated a large-format wood CNC station used for routing and carving. Before any motion, we confirmed controller file name, active work coordinate system, and safe machine state for setup operations.

Loading gcode on cnc controller — Process photo A - Program loading and controller-side file verification.

2) Recommended operating sequence

Load G-code: verify file identity and coordinate system mapping (for example G54).
Place panel stock: clean table and ensure support area is flat.
Clamp securely: keep fixtures rigid and out of all toolpath zones.
Install cutter: spindle fully stopped, collet tightened, stick-out minimized.
Close guard/dust hood: check there is no collision with clamps or stock.
Set XY/Z zero: keep CAM origin convention consistent with machine touch-off.
Dry-run logic: preview motion at safe Z before first full run.
Run and monitor: stay at machine and stop immediately on abnormal behavior.

Placing workpiece on cnc bed — Process photo B - Panel placement and alignment before clamping.

Clamping workpiece on cnc table — Process photo C - Workholding check to prevent stock shift during cutting.

Changing cnc cutter tool — Process photo D - Tool-change step with spindle stopped and collet check.

Closing spindle guard or dust hood — Process photo E - Guard and dust hood positioned before motion start.

Adjusting cnc parameters and z setup — Process photo F - Z setup and parameter confirmation before run.

3) Safety controls emphasized by the group

Wear eye protection and maintain dust extraction throughout machining.
Keep hair, clothing, and hands outside spindle envelope while running.
Re-check zero and clamping after every tool change or stock reposition.
Know emergency-stop location and keep direct access at all times.