Week 07 — Computer-Controlled Machining¶

Assignment

This week focused on computer-controlled machining using large-scale CNC equipment.
The goal was to understand the full workflow of machining a large object, from design and material preparation to toolpath generation, machining, and assembly.

Group Assignment — Safety Training

Before starting any machining process, we completed a full safety review of the CNC workflow.
This step is critical to prevent injuries, protect the machine, and ensure reliable operation.

1. Personal Protective Equipment (PPE)¶

During CNC machining, it is mandatory to use basic protective equipment:

Safety glasses — to protect eyes from chips and dust
Hearing protection (headsets) — to reduce noise exposure

These are required at all times while the machine is running.

2. Tool Installation¶

Correct tool installation is essential for both safety and machining accuracy.

Before tightening the tool in the spindle:

The tool is inserted carefully into the collet
The thread is first rotated slowly by hand
This ensures proper alignment and avoids damaging the thread
After confirming correct positioning, the tool is securely tightened

Incorrect installation can cause:

tool wobbling
poor cutting quality
potential tool breakage

3. Safety Distance and Emergency Controls¶

While the CNC machine is operating, maintaining a safe distance is critical.

The operator must stay outside the immediate machining area
Hands must never be near moving parts during operation
The working area should remain clear of unnecessary objects

We also identified all emergency stop controls:

Main emergency stop button on the machine
Control panel stop functions
Power shutoff location

Knowing these locations allows immediate reaction in case of:

tool breakage
material displacement
unexpected machine behavior

Conclusion

Following these safety procedures ensures a controlled and secure working environment.
Proper preparation significantly reduces risks and helps achieve stable machining results.