Position Setting Of Hook Need Bar; Position Setting Of The Eccentric Cam Of Needle Transporting; Position Setting Of The Eccentric Cam Of Needle Protector Movement - Global SM 7774 Operating Instructions Manual

4.3 Position setting of hook need bar

Turn the handwheel in the correct direction by hand, let the hook needle approach the awl nearest.
At this time, the distance between hook needle and awl should be about 0.8mm. This distance can
be adjusted by move the hook needle bar after loosen the fastening screw of Conical fastening pin
(654-1037).
4.4 Position setting of the eccentric cam (654-1004) of needle transporting (Fig.4)
At first, turn the handwheel by hand to ensure that the machine is all right. Then run the
machine with high speed and observe the track of hook needle transporting. (Put a paper behind the
needle plate as background will convenient for observe.)
Right track
The transporting track is as shown in Fig.4. The track A is right, the track B is too earlier and
the track C is too later. The needle transport can be adjusted by change the angle position of
eccentric cam(654-1004).
4.5 Position setting of the eccentric cam of needle protector movement (Fig.5)
Turn the handwheel by hand till the needle transporting is finished and the hook needle begin to
descend ("A " point as shown in Fig.5). At this time, the barb of hook needle is higher than the tip
of needle protector about 3.2mm.
Descend
A
" A "
Transport
Raise
Needle plate
B
Too earlier
Fig.4
Barb
Needle
protector
Fig.5
C
Too later
Tip
Needle
protector
Protector
frame
3