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LZR LASER WELDER USERS GUIDE
Chapter 6: Safety Systems
The Orion LZR laser welder is equipped with a high number of safety system checks designed to prevent laser
radiation leaks. These safety systems include the following:
Resonator Shutter
The Resonator Shutter is formed from a small flag controlled by an electromagnet and it is placed inside the
Laser Resonator. The shutter disconnects the laser inside the resonator when the welder is in STAND-BY mode.
The purpose of this device is to prevent the generation of undesired laser radiation. When the power switch is
turned on, and the key is NOT turned on, the Resonator Shutter is engaged. When the key is turned on the shut-
ter is disengaged. When the key is turned off, the shutter is engaged again.
Microscope Shutter
The Microscope Shutter is a liquid crystal filter (LCD) that dims completely when a regulated voltage is supplied.
It is placed between the 45° mirror and the focus lens of the microscope. The shutter obstructs the operator’s
vision through the microscope at the precise moment the laser weld is initiated. The purpose of this device is
to prevent the operator from exposure to the visible radiation light flash that may result from the weld being
formed.
The Microscope Shutter is the second of three safety systems deployed when a weld is made. This shutter is
normally in an opened state and is independent from the previously mentioned Resonator Shutter. This allows
the microscope to be used at any moment.
After the key has been turned to ‘start’, the shutter will engage under the following steps:
• The foot pedal is pressed.
• The microprocessor responds by engaging the shutter.
• The microprocessor turns on the laser lamp.
• The shutter remains engaged as the lamp is on, and then also remains engaged for a short time after
the lamp is turned off while the weld puddle cools and solidifies.
• The shutter will disengage allowing the operator to see through the microscope again.
