- 19 -
The followings are required for operating of installing the electric machine:
It is a must to use the specified fuse provided by the manufacture;
Immediate disconnection of power supply is required in case of power failure;
Unless otherwise prescribed, power disconnection of the electric part is required for
maintenance;
First check if there is live power on the insulated part, and then perform the treatment of
earthing and open circuit, and perform insulation for the nearby live (charge) parts;
Make regular check on the electric equipment. Timely correct failure like poor contact or
burnt power cord;
While operating live (charge) parts, minimum two persons are required at the site for
pressing the emergency stop button or disconnecting power supply if necessary; Mark
the working area with red-and-white band and warning sign;
It is a must to use insulation tools.
2.5.4
Hazard of processing outgrowth
During laser processing, outgrowth may possibly generated, and their hazard must satisfy the
requirements specified in Appendix A for example of processing outgrowth as national standard GB
18490-2001 laser processing machine. The abstract is as below:
ceramic processing
Al
2
O
3
, Mg, oxide of Ca and Si; BeO (virulent poison);
silicon slice processing
Crumb of silicon and silicon monoxide suspended in the air (possibly breathed into lungs
causing silicosis);
metal processing
In a view of iatrology, minimum the following metals and their compounds are influential:
Mn, Ni, Co, Al, Zn, Cu, Be, Pb, Sb
Medical influences are as below:
Toxic
Cr
6-
，
Mn
，
Co
Allergic reaction, burn caused by metal smoke
Zn, Cu
Lung fibrosis
Be
Carcinogenesis
Cr
6+
, NiO
Metal beryllium is very dangerous, especially cutting alloy or metal containing Zn in open air
will generate heavy metal smoke.
Plastic cutting
