GCC Technologies S290LS Series, User Manual

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6.4 Waveform Knowledge Base
A waveform is a pulse with a specific shape, pulse energy and duration. The benefits of this are that it allows
the user to adjust the pulse conditions to optimize marking, micromachining and applications. GCC Fiber Laser
is equipped unique Waveform function to give users greater control over laser pulse parameters that can lead
to more efficient and effective processing. An example would be the use of low repetition rate, high-energy
pulses to rough out and remove the bulk of the material while a higher frequency shorter pulse with less
energy can subsequently be used in a polishing pass yielding a better surface finish.
Waveform allows users flexible control over pulse duration and peak power through the use of predefined
waveforms. Each waveform is optimized for pulse energy and peak power at a given pulse duration and
frequency. These waveforms can be used at any power demand and frequency giving users great scope for
pulse characteristic optimization for specific applications.
To achieve a high quality finish, Waveforms are used to maintain control of the engraving process. When
engraving starts, a less aggressive pulse is initially used in order to avoid a perimeter ridge around the
engraved area. Then the Waveforms can be switched to a long high energy pulse with its higher material
removal rate. Throughout this process, a short pulsed Waveforms is regularly used to clean the engraved area
which helps to remove dross and debris. After the engraving process has finished, the surrounding area is
Laser cleaned using a short Waveforms to remove any surface deposits. Note that there is a trade-off between
material removal rate and engraving quality.
Below is the waveform table for different S290LS wattage:
Pulse
Duration
(ns)
Pulse
Frequenct
(kHz)
Pulse
Energy
(mJ)
Pulse
Duration
(ns)
Pulse
Frequenct
(kHz)
Pulse
Energy
(mJ)
Pulse
Duration
(ns)
Pulse
Frequenct
(kHz)
Pulse
Energy
(mJ)
0 260 20 1 220 35 0.57 250 30 1.33
1 40 90 0.2 120 55 0.36 130 47 0.85
2 55 90 0.22 60 76 0.53
3 25 170 0.12 30 145 0.28
4 18 270 0.074 20 230 0.17
5 - 10 15 290 0.068 9 250 0.16
11 220 35 0.57 250 30 1.33
12 205 37 0.54 230 32 1.25
13 200 39 0.51 220 34 1.18
14 190 44 0.45 200 38 1.05
15 160 48 0.42 170 41 0.98
16 140 51 0.39 150 43.5 0.92
17 120 55 0.36 130 47 0.85
18 100 60 0.33 110 51 0.78
19 95 63 0.32 100 54 0.74
20 85 68 0.29 90 58 0.69
21 75 72 0.28 80 62 0.65
22 65 80 0.25 70 69 0.58
23 55 90 0.22 60 76 0.53
24 45 105 0.19 50 89 0.45
25 35 125 0.16 40 108 0.37
26 25 170 0.12 30 145 0.28
27 18 270 0.074 20 230 0.17
28 15 290 0.068 9 250 0.16
29 - 63
IFII 20 / 30 / 50RMZ IFII 20SHS IFII 40HHS
Waveform
Number
Duplicate of waveform 28