3.6 Hook adjustments
3.6.1 Loop stroke and distance between the hook tip and the needle
Rule and control
The loop stroke is the distance covered by the needle bar from its
lower dead centre up to the tip where the tip of the hook coincides with
the middle of the needle.
The loop stroke amounts to 1,8 mm.
–
Lower the sewing head by the function "
Lifting/lowering the
sewing head
".
–
Press the key "
O
".
"Safe motor stop" will be switched on.
–
Lock the machine in
A
position.
The hook tip 1 should stand against the middle of the needle.
The distance between the hook tip 1 and the needle should
amount to 0,1 mm.
Caution: Danger of bodily injuries !
The machine must be in the position "Safe motor stop"
.
Correction
–
Remove the sewing foot and the throat plate.
Insert new needle.
–
Lock the machine in
A
position.
–
Loosen the fastening screws of the hook 3.
The screws are accessible through the bore-hole 4.
–
Set the hook tip 1 against the middle of the needle.
The distance between the hook tip 1 and the furrow of the needle
should amount to 0,1 mm.
In this position, the distance between the hook 3 and the setting
ring 2 will amount to about. 0,4 mm.
If the distance of 0,4 mm is not attained, readjust the hook drive
housing accordingly.
(see chapter 3.6.2)
–
Retighten again the fastening screws of the hook 3.
–
Fit the sewing foot and the throat plate.
0,1 mm
1
2
3
4
49
To Next Page
Loading...
