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Adjustment
13 - 9
13.05.08 Hook clearance, needle rise, needle height and needle guard
Requirement
With the stitch length set at "3" and in needle-rise position (= 1.8 mm past b.d.c. on version
"B" or 2.0 mm past b.d.c. on version "C")
1. The hook point must be at the "needle centre" and the clearance between hook and
needle 0.05 to 0.1 mm,
2. the top end of the needle eye must be 0.8 to 0.1 mm below the hook point, and
3. needle guard 8 must touch the needle just lightly.
● Set the stitch length at "3" and loosen screws 1, 2 and 3.
● Loosen screws 4 at the front and rear side.
● Position posts 5 according to Requirement 1.
● Tighten screws 1 and 4.
● Set the needle bar at b.d.c. and place the 1.8 or 2.0 mm thick feeler gauge close under
the needle bar bearing, move the screw clamp up against the feeler gauge and screw it
tight.
● Remove the feeler gauge and turn the balance wheel in sewing direction until the screw
clamp is against the needle bar bearing.
Fig. 11 - 08
4
5
0.05 - 0.1 mm
8
1
1
1
1
23
3
2
6
7
7
6
0.8 - 1 mm