NOVUM 555QE, Руководство по обслуживанию, Страница: 9 / 20

GHE-1207 Service Manual
9
7. Timing of rotary hook.
Tool: 2.5mm hexagon screwdriver and a specialized gauge of measurement.
Standard: The needle is required to be at a proper position with rotary shuttle hook tip
Check:
A. Set Pattern No. at 002 (straight stitch
i left positio ) or adjust stit h idth to 0
for left needle position
when pattern No. 006 is set.
B. Open Needle plate, and take bobbin case off.
C. Turn hand wheel by clockwise to make the needle raising from the bottom of shuttle race to correct
positon with shuttle hook tip as below figure shown.
D. Check relevant position between Needle hole and rotary shuttle hook tip.
Adjustment:
A. Open bottom cover
B. Use 2.5mm screwdriver, loosen the hexagon screw (A),(B) of lower shaft gear
C. When shuttle hook moves exceeding needle hole position 2.5mm screwdriver can be used as a handle
with screw (A) to move gear down until the hook tip reaches correct position with needle.
D. When shuttle hook moves before needle hole position 2.5mm screwdriver can be used as a handle with
screw (A) to move gear up until the hook tip reaches correct position with needle.
E. Tighten the hexagon screw (A) (B) of lower shaft gear.
Note: 2 pcs of hexagon screws (A) & (B) must be secured and tightened.