PRECESSION ELEPHANT 2 Scan Head 2
4. If your distance between nozzle and work piece differs from the factory setting
mentioned in the previous step then this means that the focus and thus the
Z-position needs to be corrected to the surface of the workpiece:
•
Turn the silver adjusting ring at the focusing optics to correct the focus.
The nonius at the ring gives the distance in 10 µm per scale gradation.
If your distance between nozzle and work piece is less than 1.0 mm,
e.g. 0.6 mm, then decrease the value on the nonius i.e. turn the adjusting
ring in this direction:
(regarding the figure below).
If your distance between nozzle and work piece is greater than 1.0 mm,
e.g. 1.4 mm, then increase the value on the nonius i.e. turn the adjusting
ring in this direction:
(regarding the figure below).
nonius
adjusting ring
NOTICE
Back reflection
could cause damage to internal optical components.
•
Keep the work piece
less than
500 µm “below” the focus at any time.
The following figure illustrates this.
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