Fig. 12 - 01
● Turn the balance wheel until the needle bar has approximately reached the required
position.
● Place the 5 mm blocking pin in the appropriate hole and put pressure on it.
● Turn the balance wheel forwards and backwards a little until the blocking pin moves
into the slot in the crank behind the bearing plate, thus blocking the machine.
Hole 1 = 2.0 mm after the bottom dead center of the needle bar (2.0 past tdc)
Hole 2 = Top dead center of the needle bar (tdc)
Hole 3 = 0.25 mm after the top dead center of the needle bar (0.25 past bdc)
Hole 4 = 1.0 mm after the top dead center of the needle bar (1.0 mm past tdc)
Hole 5 = 4 mm after the bottom dead center of the needle bar (4.0 past bdc)
12.04 Check and adjustment aid
By blocking with holes 1 - 5 the required needle bar positions can be fixed
exactly.
81-016
4
2
5
1
3
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