G.Weike Laser
Profession Laser Manufacturer more than 15 Years.
43
During laser cutting process, relative location between laser beam focus and
cutting materials surface has big influence on cutting effect. It is very important
to adjust the focus position. This kind laser cutting machine is equipped with
automatic followin
g adjusting device, when material height changes, control
system could adjust automatically to make sure the distance between nozzle
and material is constant, the focus position steady.
Manual adjustment method, adjust the adjusting nut at button of laser head,
make the focus position meet the needs of cutting. On condition that, find the
zero focus position. During cutting process, it is possible to adjust cutting height
slightly according to adjusting operating board height to adjust rotary knob. It
needs the very professional stuff to adjust the height during cutting process. It
can adjust focus position automatically according to the setting parameter.
Advantage of it is improving working efficiency, and it could make up the
changes of focus position caused by changes of optical path.
5.6.2.1 Method to find focus position
Use triangular block to find focus (also could sue slant wood board instead)
A)Put one flat plate on working table, and put one fixed block with a
hard board to form the three-legged structure. See picture 5-20.
Picture 5-20: Adjusting laser focus1
Adjust the focus automatically; it is equipped with auto adjusting laser head,
B) Take down the nozzle, adjusting nut to the lowest place of focus position,
move Z axis and adjust Z axis height, fallen height can not intervene the
triangular block.
C) Input execution find focus program, at this time not change Z axis height
and move Y axis, the output laser will form burning-out trace on triangular
block. The smallest burning-out is the focus of the laser. See picture 5-21:
Picture 5-21: Adjusting laser focus2
D) Install the nozzle, move Y axis to make cutting nozzle center to the
above position of focus, Available to use red light as auxiliary. Manually
adjust the focus adjusting nut to make cutting month close to the boar. The
position that cutting head scale showed that is the zero focus position. Keep
in mind of this. See picture 5-22:
