3M Speedglas G5-01 Directives D'utilisation page 10

6. The amount of force necessary to lift the inside grinding shield may be adjusted, as well as a parking stop point where the shield will remain in
the open or up position.
a. To adjust the force or friction, turn the right-hand pivot knob labeled FRICTION clockwise to increase, counter clockwise to decrease (Fig. 6a).
b. The parking stop, is a natural stopping point that will help hold the grinding lens in the open or up position. To make the stopping point more
prominent, turn the left-hand pivot knob labeled PARKING clockwise to increase, counter clockwise to decrease the holding power at the
stopping point (Fig. 6b).
R
FRICTION
c. The parking stop may be disabled by unscrewing the left pivot knob, pulling off the retaining washer, removing the stainless-steel washer,
replacing the retaining washer, placing the stainless-steel washer over the retaining washer (stainless-steel washer moved from inside to
outside the retaining washer) then reassembling the left pivot knob (Fig. 6c).
Fig. 5a
Fig. 6a
L
PARKING
8
Fig. 5b
Fig. 6b