GSI Group - Laser Division
JK300HP/JK300P/JK125P
Issue 2.0
Pre-installation and User Manual
Part No: 1EA300E01
Page
19 of 172
1.11.2 Parameter Set Selection
The required parameter set can be selected locally.
1.12 Laser Outputs
The JK300HP/JK300P/JK125P Series Laser has the facility to output the following
information via either the Local or Remote Controller:
Laser Status:
•
OFF / Ready/ON.
•
Local / Remote control.
Shutter Status:
Open and Closed status of up to 4 Shutters.
Alarm Code:
•
Alarm or warning code.
1.13 Operating Guidelines
To conserve energy consumption and extend Arc-lamp life, it is good practice to switch the
Laser to Ready during periods of inactivity (no processing).
The frequency at which the Laser will be switched to Ready depends on the processing
being carried out and may vary from high (between components) to low (production line
maintenance periods).
High power continuous wave Nd: YAG Lasers require a short time for the Laser output to
become usable after a large change in input power to the Arc-lamps (e.g. the transition from
READY to ON). The JK300HP/JK300P/JK125P Series Laser requires approximately 2ms.
It is not advisable to switch the Laser to Ready if process time is less than several seconds.
If the Laser is operating under this condition, the Laser must remain ON and the process
must be controlled using the Shutter.
The time taken for the Laser output to increase from the Ready level to the target output and
visa versa can be programmed as a Ramp Up and Ramp Down time. This time can be set
from 0 seconds (+ Rise Time) to 9.99 seconds (+ Rise Time)
1.14 Processing Considerations
This section provides a brief overview of parameter control requirements for processing.
The programmable Ramp Up time is used to initiate a gradual increase in weld penetration.
This reduces weld initiation defects.
The programmable Ramp Down time is used to obtain a controlled termination, or ‘Fade
Out’, of a weld process. This reduces weld termination defects. This feature is used
particularly on perimeter welds for circular components where the weld overlap is controlled
to produce a defect free weld termination.
For applications that require the Laser output to vary from the READY to ON power levels at
high frequency (5 – 1000Hz) a ‘Laser ON’ input is used with Ramp Up/Ramp Down times set
to 0.
During this process, the Shutter is opened at the start of the process and remains open. The
Laser output is then switched ON and OFF at high speed during the movement of the
focused beam along the workpiece. The resultant ‘stitch’ weld can prove useful on distortion
Petitioners Canadian Solar Inc. and Canadian Solar (USA) Inc.
Ex. 1025, p. 19
