Fig 4.4 Drag Control Knob Adjustment - Vinten Vision 11 Maintenance Manual

Contents
Drag control knob adjustment
NOTE: The pan and tilt drag control knobs will not normally require adjustment. However, in the
event that bedding-in of the mechanism occurs, the knobs should be reset.
The procedure shown is for the pan drag knob. The tilt drag knob is adjusted in a similar
fashion
20 The pan and tilt drag control knobs are set so that drag begins to be felt between 1 and 2 on the scale.
The procedure for resetting is as follows
20.1 Release the pan and tilt brakes.
20.2 Turn the drag control knob
six turns.
20.3 Hold the indicator
the detent mechanism, or half the pitch of the control knob lobes.
20.4 Carefully tighten the grub screw (3), adjusting the position of the control knob as necessary so
that the grub screw seats correctly in a slot in the indicator and may be screwed fully home.
20.5 Decrease drag to zero.
20.6 Increase drag and ensure that drag begins to be felt at about 1 on the indicator. Repeat the
above procedure until this can be achieved.
(Fig 4.4):
(2) until the grub screw
(1) stationary and rotate the control knob

Fig 4.4 Drag Control Knob Adjustment

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(3) is accessible. Slacken the grub screw by
(2) 18° to the left. 18° is two clicks of
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(1)
(2)
(3)
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