Table of Contents
Advertisement
18. Setting of the controlling force of the zigzag stitch adjusting (Fig. 18, 19)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
To get a continuous tilting of the slot link of the zigzag stitch (19) there is placed in the insert (10) the braking roller (1) with the
spring (5) and with the regulating screw (8). In turning the screw to the right, the pressure upon the roller increases in increasing
so the force necessary for setting the zigzag stitch width. The proper securing of the zigzag stitch setting is done by means of a
arresting mechanism controlled by the lever (7). Proceed to any setting of the zigzag stitch width only after having loosened this
lever in turning it to the left. The zigzag stitch width is set by shifting the lever (2). In its zero position (up to the stop) the zigzag
stitch width is zero, in shifting the lever to the right it is increased up to 10 mm. The numerical designation on the guard (16)
corresponds approximately to the set values. The shifting force is regulated after having withdrawn the complete zigzag stitch
mechanism from the web of the arm. Unscrew first two screws (17) on this mechanism and remove the guard (16) therefrom.
Unscrew three fastening screws (3) from the body of the zigzag stitch mechanismu. Unscrew the lock screw (18) on the pin (20)
and pull this pin out from the guide (19). Loosen the arresting lever (7) and disengage the pin (21). In this way the body of the
zigzag stitch mechanism is loosened to be removed from the machine arm. The remounting thereof is done in the inverse
procedure.
4
6
5
1
8
19. Taking up of the teeth clearance in the zigzag stitch gearing (Fig. 17, 18)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
For taking up the teeth clearance in the zigzag stitch gearing there serves the eccentric pin (6, Fig. 18). If we want to change the
clearance, we must dismount first the upper guard (1, Fig. 17) after having unscrewed four fastening screws (6, Fig. 17). After
having loosened the screw (5, Fig. 17) which is placed on the riser in the arm space, proceed, in turning a bit the eccentric pin (6,
Fig. 18), to taking up of the teeth clearance in the zigzag stitch gearing, namely between the toothed wheel on the complete cam
and the toothed wheel (3, Fig. 17) on the upper shaft. Secure the adjusted position by tightening orderly the screw (5, Fig. 17).
3
2
10
9
3
7
Fig. 18
7
20
19
21
18
16
17
Fig.19
Advertisement
Table of Contents
