JUKI HZL-NX7 - Presser Foot Lifting and Lowering

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6-7 Hook driving shaft coupling and the lateral timing of the hook driving shaft
Adjustmentprocedure
 1.Positiontheatsectionofthehookdrivingshaftsetscrewandthegrooveinthecouplingsothattheyare
in parallel with each other. (Fig. 1)
(Right and left couplings (Fig. 2))
 2.Wheninstallingthehookdrivingcams,adjustthetimingoftherightandlefthookdrivingshaftssothatthe
timingbetweentherightandleftfeedrockcamsisoppositetoeachother.(Fig.3)
3. At the center of the right and left hook driving shafts, tighten the coupling setscrew so that there is no
backlashinthethrustdirectionofthecoupling.(Fig.4)
(Caution) When tightening the setscrew, take care not to allow the coupling to move out of alignment from
the at section of the shaft. In addition, carefully conrm the timing of the right and left hook
driving shafts.
Groove in the coupling
Flat section
Install so that the timing between the cams becomes opposite.
(To correctly position the cams, place pin on the hook driving shafts)
Hook driving shaft, left
Hook driving shaft, right
Fig.1 Fig.2
Fig.3
Fig.4