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Adjustments
Resetting the drag knobs
5 The Vision SD12 pan and tilt drag controls will not normally require adjustment. However, in the unlikely
event that bedding-in of the mechanism occurs, the following procedure should be followed to reset the drag
knobs (Fig 4.1):
5.1 Release the pan and tilt brakes.
5.2 Prise off the drag knob sleeve (1) from the pan or tilt drag knob
5.3 Remove screw (2) securing drag knob (3). This screw is secured with Loctite.
5.4 Turn the drag knob fully counter-clockwise to 0, then, while panning or tilting the head, slowly
turn the knob clockwise until drag begins to be felt.
5.5 Pull off the drag knob (3) and refit so that 1 is aligned with the datum (4). During refitting, ensure
that the knob is eased over the drag knob detent and is seated squarely on the face of the drag
adjustment boss.
5.6 Operate the knob over its range and ensure that drag begins to be felt between 0 and 1.
5.7 Apply Loctite 222E to the thread of screw (2) and secure knob (3) in position.
5.8 Using Loctite 406 and primer 757, secure rubber cover (1) over knob (3).
Fig 4.1 Resetting the drag knobs
(1)
(2)(3)(4)
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