4
3.1.7 Setting the regulation of the hook lubrication
By turning the lubricating tube (1) in the sense of the arrow
(2), the size of the contacting surface between the wick (3)
and the felt insert (4) is regulated. In this way, the speed of the
capillary lift of oil into the felt insert (5) is influenced, from
which oil is wiped on the surface (6) and is driven by centrifugal
force into the hook path (7).
Setting of full lubrication
- Turn the screw (8) into the position (9).
Setting of limited lubrication
- Turn the screw (8) into the position (10).
After having ended the regulation, set the height of the lubricating
tube (1) at 0.4 mm from the eccentric (11).
3.1.8 Replacement of the hook
Caution! Danger of injury!
Switch off the main switch ! Before starting the setting
operation, weit until the motor stops!
- Remove the throat plate and the trimming knife.
- Unscrew the screws (1) and remove the gib (2).
- After having suitably turned a bit the hook, remove the bobbin
case (3).
- Unscrew thorougly the screw (4).
- Remove the body of the hook (5) upwards.
- When mounting, the procedure is inverse.
3.1.9 Setting the gear
The mutual angular orientation of the gear wheel (1) relative to
the gear wheel (2) should ensure the accessibility of the screw (5)
at the moment when the hook point comes to lie opposite the
needle (4). The wheel (2) is to be set with its gear rim symmetrically
to the centre of the gear wheel (1). The clearance between the
gear wheels is to be the least possible.
Caution ! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Set the angle of 2O5
°
on the handwheel (6) and lock it with the
screw (7).
- On the removed post of the hook (8), according to the pa-
ragraph 3.1.10, the hook point (3) is to be turned a bit
according to the illustration.
- Turn the gear wheel (2) into the suitable position and insert the
post of the hook into the machine according to the respective
arrows. Check up, whether the screw (5) is accessible and,
if not, repeat the procedure.
- Set the the distance of the hook from the needle according to
the paragraph 3.1.3.
- Set the precise angular displacement of the hook according to
the paragraph 3.1.4.
- Loosen the screw (10) and tighten them slightly.
- Set the clearence in the gear in turning the screws (9). Check
up, whether the gear has a clearance during the whole revolution
of the hook. Turn the handwheel step by step by 15
°
and, with
each step, grasp the hook and try, if there is an angular dead
travel. Tighten carefully the screws (9).
- Tighten duly the screws (10) and try anew the clearance of the
gear.
1
2
3
4
5
1
2
1
3
4
5
6
7
11
0,4
8
10
9
15
o
1
5
2
4
3
7
6
205
o
9
8
10
10
~0,5