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NN3 & NN3 MKII Complete Manual

6. NN3 MKII Detent Plunger Adjustment

It is important to note the detent plunger on the NN3 MKII lower rotator is pre-set at the factory with the plunger being optimized and fixed. If the precision of the detent system is reduced over time, minor adjustment may be necessary, so please follow these instructions carefully.

NN3 MKII Detent Plunger Adjustment

Only the height of the plunger can be adjusted. This height has a large effect on the precision of the detent system. Incorrect adjustment can cause damage to the brass detent rings.

Adjust the height of the plunger by tightening or loosening the plunger screw on the underside of the rotator. Use either a screw driver or included hex key.

Loosen the plunger so that the click ball is flush with top rotator surface. Use the flat surface and a hole of the detent ring to adjust the appropriate height of the detent plunger. Gradually tighten the plunger using the hex screw. Snap the click ball to a detent hole. Adjust the height of the plunger so that the detent ring is raised approximately .1mm (about the same as 2 sheets of plain paper).

Detent Ring

NN3 MKII Detent Plunger Adjustment

Align the click ball to the flat portion of the detent ring surface. Compress the detent ring so that no gap between the detent ring and rotator base exists (as shown). If a gap exists, loosen the plunger slowly (while compressing the detent ring) until the gap just disappears. Further loosening will reduce the precision of the detent system. You could replace the detent ring with any flat surface in this step.

NN3 MKII Detent Plunger Adjustment

We emphasize there must be no gap when the click ball is compressed using the ring as shown, or the detent ring will be damaged.

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