7. Upper feed settings
7.1 Altering the upper feed
Mechanical sewing foot stroke adjustment
The foot stroke can be adjusted to match the thickness of the material
during the sewing through the setting wheel 7 on the arm cover.
The joint for the sewing foot stroke adjustment is provided with an
eccentric. The eccentric allows the an altering of the foot stroke from 1
to6mmorfrom1.6to7mm.
Electro-pneumatic stroke adjustment (HP)
The maximum stroke can be activated while sewing is in progress using
the knee switch, when sewing thick material or for overstitching cross
seams .
7.1.1 Lateral position of the lever for transmitting the setting w heel motion
The lever 3 should be centered in the slit of the arm cover.
During operation without the arm cover, the safety stop 1 prevents the
no longer arrested joint 2 from being torn out of the bearing.
At the smallest and the largest stroke there is a clearance of
approx. 0.4 mm between the joint 2 and the safety stop 1.
Caution: Danger of Injury !
Switch off main switch.
Check and adjust lateral position of the lever only when sewing
machine is switched off.
Standard checking
The lateral position of lever 4 must ensure that the ball stud 3 is in the
centre of slit 8 when the arm cover is placed on.
–
Unscrew fastening screws of arm cover 9.
–
Lift arm cover 9 slightly and check lateral position of lever 4.
Correction
–
Remove arm cover.
–
Loosen clamping screw 5 at lever 4.
–
Shift lever 4 axially on shaft 6 .
Attention!
The lever must not be twisted w hen being shifted axially.
–
Tighten clamping screw 5.
26
3
4
5
6
1
2
98
7
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