Task: Make reverse markings on plastic.
To complete the task we are using an Endurance 3 watt UV laser machine
Endurance 3 watt UV (355 nm) laser module
Pulse duration at 30 kHz is less than 18 ns . The laser operates in the frequency range from 20 kHz to 150 kHz. To maintain the laser operating temperature (25 °C), a water cooling system is used.
The machine is equipped with a galvanometer RC7110 with a lens “SL-355-110-160-D10-LP” installed on it, having a focal length of 160 mm and a working area of 110 mm by 110 mm.
The machine is controlled using the EzCad program .
General view of the installation
For marking, a two-dimensional inscription “ ENDURANCE” was used LASERS ” with a reverse highlight element.
The width of the inscription was set to 60 mm. Marking was carried out on green Petg plastic
The marking of the inscription was made by tracing each face of the letter along the contour followed by filling the outer contour. The distance between the fill lines was set to 0.05 mm.
Green plastic:
Based on the test results, the following labeling parameters were selected:
Frequency (kHz): 30
Q Pulse Width (us): 1
Speed (mm/s): 400
Loop Count: 40
Start TC ( us ): 150
Markings on green plastic
The engraving depth was 0.4mm
White plastic:
Based on the test results, the following labeling parameters were selected:
Frequency (kHz): 30
Q Pulse Width (us): 1
Speed (mm/s): 400
Loop Count: 20
Start TC ( us ): 150
Markings on white plastic
The engraving depth was 0.24mm