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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
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5
Adjustment of Beam Center and Focus Position
5.1
Beam Center Position Adjustment (QBH interface)
Cutting quality in a great extent depends on whether the beam spot is in the center of nozzle
or not. If the beam spot is not in the center, the laser beam may hit the nozzle or inner wall of the
laser head, that leads to produce high temperature deformation. Beam center position adjustment
should be considered when nozzle is replaced or the cutting quality is decreased.
Beam center position adjustment of the laser cutting head can be finished by adjusting
Collimating lens, X-Y direction. The adjusting screws are located on the top of the cutting head as
shown in Figure 5.1. By using inner hexagon spanner users can loosen or tighten the adjusting screw
until the beam spot is located in the center of nozzle. Make sure the laser beam output from the
center of nozzle. A method commonly used, tape dotting method:
Pick a scotch tape, flatten it, and stick it to the nozzle end face.
Open the inner guiding red light of the laser. Finding and observing the position that the
red light on the scotch tape relative to nozzle center;
open and adjust laser generator at the range of 80W-100W ,then laser dotting.
Tear off the tape and check the hole is in the center of the nozzle or not;
Repeat the above steps until the beam spot is in the center of the nozzle .
This center adjustment requires a series of steps, which is the basic operation of general
laser adjustment.
Fig 5.1 - QBH interface beam centering
X-Y adjust screws
