Ametek 0 LAND LSP HD 61, Руководство пользователя

Страница: 15 / 42

Page 9
User Guide LSP
HD
Linescanner Head
2.2 Changing the focus distance
(LSP
HD
10, LSP
HD
11, LSP
HD
20, LSP
HD
21 & LSP
HD
22 only)
The focus distance of the LSP
HD
10, LSP
HD
11, LSP
HD
20, LSP
HD
21 and LSP
HD
22,
linescanner head is factory set to 2m / 79in. The focus distance can be user-adjusted
in the range 1m / 40in to infinity.
1)
Remove the front cover of the scanner (the panel nearest the laser switch).
Refer to Fig. 2. The focus can be adjusted by turning the
Focusing ring , which
is held in place by the Clamping plate .
2) Remove the top screw from the Clamping plate to free the Focusing ring .
3) In order to focus the instrument accurately, the focusing mechanism must first be
'zeroed'. Rotate the Focusing ring in the direction of the 'Focus long' arrow (i.e.
to the right) until it is wound in fully.
4) Refer to the table below. Rotate the Focusing ring to the left for the number of
turns required to match the focus distance you want to set.
The table below gives the focus distances that can be achieved by turning the
focusing ring. Each screw hole on the focusing ring is at 0.05 of a turn.
Focus distance
m / in
LSP
HD
10
LSP
HD
11
LSP
HD
20 LSP
HD
21
LSP
HD
22
Number of turns from fully wound in
1.0 / 40 7.70 8.95 8.45
1.2 / 4.7 6.80 8.00 7.50
1.5 / 59 5.85 7.05 6.60
2.0 / 79 4.95 6.15 5.65
3.0 / 118 4.05 5.20 4.70
4.0 / 157 3.60 4.70 4.25
5.0 / 197 3.35 4.45 4.00
6.0 / 236 3.15 4.25 3.80
7.0 / 276 3.00 4.15 3.70
8.0 / 315 2.95 4.05 3.60
10.0 / 394 2.80 3.90 3.45
Infinity 2.30 3.40 2.95
5) To adjust the focus to a distance other than that quoted in the above table, rotate
the focusing ring to the required intermediate position.
6) When you have focused the scanner to the required distance, there will be a hole
in the Focusing ring that aligns with the hole in the Clamping plate (you may
need to adjust the Focusing ring slightly). Insert and tighten the screw through
the Clamping plate to secure the Focusing ring in position.
7) Replace the cover panel.
The scanner is now focused.