4.2 Adjusting the laser beam
4 - 38
© Precitec GmbH & Co. KG • EN 09/2019
Setting the focal position
If the machine manufacturer does not prescribe a different procedure, we sug-
gest that you follow the steps described below:
Adjusting the scale reading
(reference adjustment, optional)
Fig. 4-3
Commissioning: Laser beam - Reference adjustment
1.
Put a sample under the laser head
(nozzle)
.
Caution laser beam
(laser class 4)
– Wear laser goggles!
• Avoid radiation to eyes or skin caused by direct or scattered radiation.
• Use laser goggles
(in compliance with DIN EN 207)
that are designed for the
wavelength of the connected laser.
2.
Trigger a
(low-power)
laser pulse and judge the penetration in the sample.
3.
Change the nozzle standoff distance to find the smallest penetration.
4.
For the smallest penetration determine the standoff distance (d) between the
nozzle and the sample surface.
5.
If the measured standoff distance
(d)
does not match the desired standoff
distance
(Zn)
, you must adjust the lens by the difference in the direction of the
linear drive.
Turn the adjusting screw using the Allen key
(size 5)
and centre the laser head's focal
position correctly.
After calibration is completed, note the difference
(on the scale)
for later
activities.
3
Scaled dial
(scale, 0.5-mm graduation)
4
Fixing screws
(SW2.5)
(2x)
4
3
(size 2.5)
LC-B
A-oTzn
Scale - Reference adjustment
Loosen the fixing screws
(4)
. The zero mark can then be calibrated to the new
position. When adjustment is complete, secure the scaled dial again.
