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4.
Release the two swivel mount levers
(Fig. 255)
to position the swivel mount
parallel to the scan surface
(Fig. 256)
. When alignment with scan surface is
achieved, lock the crawler swivel mount levers.
5.
Loosen the rear rotational adjustment knob to lower the weld scan frame
towards the inspection surface
(Fig. 256)
. Ensure gap
B
(Fig. 257)
is no smaller
than gap
A
(Fig. 256).
6.
Loosen the front rotational adjustment knob
(Fig. 257)
to lower the weld frame
towards the inspection surface while ensuring gap
C
(Fig. 258)
is no smaller
than gap
A
(Fig. 256).
A
Fig. 256 - Set rear rotational adjustment knob
B
Fig. 257 - Set front rotational adjustment knob