
B–70114EN/04
2. SAFETY
41
All the laser products have to comply with the various kinds of laser safety
regulations, which include the use of key control. For instance, FDA
PART 1040 PERFORMANCE STANDARDS FOR
LIGHT–EMITTING PRODUCTS, Sec 1040. 10 (f), (4) states: “Each
laser system classified as a Class IIIb or IV laser product shall incorporate
a key–actuated master control. The key shall be removable and the laser
shall not be operable when the key is removed” and EN60825–1:1994, 4.5
Key control state “Any laser system belonging to one of the following
classes shall incorporate a key operation master control: Class 4 and Class
3B, except for Class 3B with not more than five times the AEL of Class
2 in the wavelength range from 400 nm to 700 nm. The key shall be
removable and the laser radiation shall not be accessible when the key is
removed.”
Because the laser package products offered by FANUC cannot produce
the laser beam as they are in the state of shipment, the system integrator
who incorporates FANUC products into the system, which generates the
laser beam, is obliged to incorporate the master key as defined by the
relevant regulation.
The shutter lock is prepared because it dose not put out the laser beam by
mistake. If you do not put out the beam, lock the shutter.
Use the mechanical switch at shutter lock switch, not electrical
component (Relay)or switching circuit (Transistor, FET).
Use the one with the compulsion dissociation mechanism for the switch
used for the shutter lock circuit and the switch for welding prevention.
To designer of laser processing machine
1. Use a mechanical switch for the switch used to lock the
shutter. Do not use an electric switch (For instance,
transistor circuit, etc.). Moreover, use the one with the
contact dissociation mechanism to prevent welding for a
mechanical switch.
2. Put it in the series of the contact of the emergency stop
button in the shutter lock circuit. When the emergency stop
switch is pushed, it is necessary to intercept the power
supply to the shutter.
2.8
KEY CONTROL
2.9
SHUTTER LOCK