3.4
Roller foot lifting
Rule:
1. The lifting of the roller foot via hand lever should be of
5.4
to
5.6 mm
.
2. The lifting of the roller foot via electromagnet should be of
11.5
to
12.5 mm
.
3. The lifting of the roller foot via knee lever should be of about
0.2
to
0.4 mm
higher than the electromagnetic lifting (if existing).
–
Remove the solenoid of the presser foot lifting.
–
Loosen screw (1). Bring the hand lever (2) into the depicted
position and simultaneously screw in screw (3) until it butts against
the lever (4). The lever (2) remains in the depicted position.
–
Put a spacer of
5.6 mm
underneath the roller foot and push the
lever (5) manually according to the figure above until it stops.
Tighten screw (1). This procedure accomplishes rule 1.
–
Remove screw (3) and mount the electromagnet of the presser foot
lifting (6). In order to check whether rule 2 is accomplished, engage
the magnetic core. If the values are not correct, effectuate an
adjustment.
–
Set the lifting of the knee lever according to rule 3 by adjusting
screw (3).
23
EN
1
3
1
6
7
3
2
5
4
Содержание 887 Series
Страница 1: ...887 Service Instructions...
