BM115 SERIES 6-12KW Laser Cutting Head User Manual
5.2.4 Removal and Installation of Focus Lenses
Removal and installation of focus lenses refer to the following steps:
Remove the laser head and move to a dust free room. Clean all dusts on the laser head
surface;
Open the dustproof cover and unscrew the locking screw as figure 5.6;
Dustproof cover
Locking screw
Figure 5.6— Removal of focus lens assembly
Take out focus lens assembly and seal opening by textured tape;
Remove the pressing ring and focus lens by lens tool;
Replace or clean the focus lens.
As shown in figure 5.7, put the focusing lens and pressing ring into the lens holder
carefully and tighten the pressing ring properly;
Install the focus lens assembly into cutting head and tighten screw.
Check if the focus point is at the center of nozzle. If not, you need to repeat beam
adjustment procedure.
Pressing ring
Focus lens
Lens holder
Pressing ring
Focus lens
Lens holder
F150
F200
Figure 5.7 — Installation of focus lens (up to 8KW version)
Attention: the biconvex lens gets 1 big curve face and 1 small curve face. The small curve face
shall be next to concave face of meniscus lens.
5.3 Replace Nozzle Connector
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