safety features in cnc machines

SAFETY FEATURES IN CNC MACHINES

It is well known that CNC machines are generally safer than manual machine tools. CNC machines are built with the proper safety devices in place. These may include guards and other protective devices, it is important that these safety devices are firmly fitted in place at all times while the machine is in use.

Many machines lock the guard in position during operation and can only be opened when the tooling stops.

(a) Emergency stop button:

The emergency stop button is used to shut down the machine instantly. This button is located on the handheld unit, the control panel, and other places on the machine.

(b) Soundproof casing:

The soundproof casing reduces the noise emitted by the operating section of the machine. It also protects the machine operator from the risk of flying tool fragments and any other flying objects.

(c) Curtain guards:

The curtain guards are made out of PVC. These are designed to shield the machine operator from the risk of tool fragments or airborne chips. Most CNC machinery is partially or totally enclosed by metal enclosures equipped with thermoplastic vision panels, most commonly polycarbonate. They are completely enclosed during machining to reduce the risk of flying chips, debris from broken tools or contact with a spinning tool.

(d) Guard fence:

This part marks the maximum working area of the machine. This fence keeps the machine operator away from any moving parts.

(e) Contact mats:

The operator uses this control to stop the CNC machine instantly. When he or she stands on the mat the machine stops instantly. This protects the operator from the moving parts.

There is also a list of personal rules that should also be followed outside of understanding the basic safety functions of the machines. The following are the general rules posted on the CNC machines.

DOs:

• Always ensure that proper ear protection and a good pair of safety glasses are worn when operating a CNC machine.

• Ensure that the safety glasses are firmly in place every time the cutting tools are closely observed.

• Ensure that suitable footwear such as safety boots are worn.

• Ensure that the long hair (if any) is covered when the CNC machine is operated.

• Ensure that the hands are kept away from any moving parts during machining processes.

• Stand clear of the machine whenever it is operational. Any other people near the risk of being too close to it should also be warned.

• Avoid touching the cutting edges while handling or passing tools.

• Ensure that you turn the machine off completely and clean it whenever you have finished using it.

DON'Ts:

• Never wear gloves while operating the CNC machine.

• Never wear jewelry or any loose clothing.

• Never try to reach into the machine while it's running

• Never put your hands anywhere near the spindle when it's revolving.

• Never leave the machine when it's not completely powered down.