Operator Manual
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7
Protections
All the safety measures that consist in the use of specific technical means (guards, safety devices) to protect persons from hazards that cannot be
reasonably limited through design are considered as protections.
Tampering with protections or any modification of the equipment can cause risks for the users and for other exposed persons.
Interlock contact
Description
The interlock is a switch with normally closed contact, which must be positioned on the access door/s to the
premises where the equipment is located. The electric connections of the switch are shown in the figure below.
Purpose
The interlock contact is used to prevent LASER operation where the safety standards envision the same. This
safety device is mandatory if operating with the welding chamber open or when the welding chamber bottom
is removed. A blind interlock connector is supplied for use of the equipment with welding chamber bottom
inserted and in normal operating conditions.
Operation
When the contact opens, all normal equipment operations are blocked and a warning message is displayed on
the screen, until the contact is restored.
The male DE-9 connector (OME00192) with case (RS000080) is supplied with the equipment; cables and switches are not supplied.
Leather barrier
Description
Several layers of strips of leather form a mobile and permanent barrier at the access aperture to the welding
chamber, through which the operator can introduce his hands and the manufactured products to be welded.
Purpose
The set-up of this safety device is made necessary in order to prevent every possible leak of radiation from the
welding chamber, prevent the exposure of the operator or persons nearby to the product flashes during the
welding operations and prevent the easy leakage of any protections gases used.
Operation
The leather barrier, which blocks the passage of LASER radiation, can be easily replaced if most of the strips
should be damaged through use, be bent, broken or cut.
Resonator shutter
Description
This device consists of motor-driven flag and is located inside the LASER resonator system. The shutter intervenes
by cutting off the LASER beam path within the resonator when the welder is in stand-by or in the event of an
anomaly.
Purpose
This device prevents the generation of unwanted LASER radiation.
Operation
The shutter is activated when the power supply is turned on, before the equipment is activated.
On activation, the shutter clears the LASER path, and the equipment is ready for normal operation. A microprocessor
control checks that the shutter is disabled in a timely manner: any anomalies are indicated by a warning on the
display.
When the equipment is turned off, the shutdown procedure is performed, which closes the shutter; a check is then
performed to ensure correct closure. Any anomalies will always be signalled on the display.
Resonator shutter movements are detected by an infra-red sensor controlled by the movement of the motor shaft.
The breakdown of this infra-red sensor is detected by the microprocessor, which puts the system in the alarm mode,
preventing normal operation of the equipment and highlighting the anomaly with relevant wording on the display.
The breakdown of the motor or its control driver is detected by the microprocessor by checking the ON/OFF
movement implementation times of the flag and is highlighted on the display by relevant warnings.
