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13
Check and adjustment aid
.04
Fig. 13 - 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
Hole 2
Hole 3
Hole 4
Hole 5
By blocking with holes 1 - 5 the required needle bar positions can be fixed
exactly.
=
2.0 mm after the bottom dead center of the needle bar (2.0 past tdc)
=
Top dead center of the needle bar (tdc)
=
0.25 mm after the top dead center of the needle bar (0.25 past bdc)
=
1.0 mm after the top dead center of the needle bar (1.0 mm past tdc)
=
4 mm after the bottom dead center of the needle bar (4.0 past bdc)
Adjustment
4
3
1
2
5
13 - 2
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