Adjustment
6
Fig. 13 - 01
13
.04
Checking and adjustment aid
It is possible to precisely locate the required needle bar positions through
insertion in holes
1
-
5
.
O
Turn the handwheel until the needle bar has almost reached the required position.
O
Place the adjustment pin in the corresponding hole provided and press it down.
O
Turn the handwheel slightly back and forth until the adjustment pin engages in the crank
cutout behind the bearing plate, thus blocking the machine.
Hole 1
=
2.0 mm
after bottom dead centre of the needle bar (
2.0
after b.d.c.)
Hole 2
=
top dead centre of the needle bar (t.d.c.)
Hole 3
=
0.25 mm
after top dead centre of the needle bar (
0.25
after t.d.c.)
Hole 4
=
1.0 mm
after top dead centre of the needle bar (
1.0
after t.d.c.)
Hole 5
=
4.0 mm
after bottom dead centre of the needle bar (
4.0
after b.d.c.)
Summary of Contents for 937
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