21
6
3
1
4
2
5
4
3
1
2
7
5
6
2
1
4
3
3.7.9.3 Setting the gear clearance
and in the mounting of the top roller
In the cone gear of the drive of the top roller foot, the minimum
clearance must be set. A too small clearance will increase the
friction resistance of the gear, the excessive clearance will
influence the inaccuracy of feeding. The top roller itself is
mounted on balls. With this type of mounting,it is also
necessary to set the minimal possible radial clearance.
The given clearances are set as follows:
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
Clearance in the wheel mounting
- Loosen three screws (5) /only slightly/.
- Using the screw (4) set the minimum clearance in the top
roller mounting (2) /it must easily rotate without any rubbing
and with a minimum clearance/.
- Tighten the screws (5), check the set up clearance, even-
tually, repeat the setting procedure.
Clearance in the conic gear
- Loosen the screw (1), in shifting the wheel, resp. the holder
(3) in the holder groove (6), set the minimum clearance,
the pinion (7) must be pushed up to the holder bottom (6).
- Tighten the screw (1), check the set up clearance.
3.7.9.4 Setting of the height and of the pressing
force of the top roller
Check the setting in the bottom dead centre of the bottom
feeder (the feeder is below the throat plate). The top roller in
thos position of the feeder must fit onto the throat plate insert
without any clearance.
Set the pressing force of the top roller (1) in such a way, so
that no slipping of the stitched material occurs when being
fed.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
Setting of the top roller height
- Lower by hand the presser bar (3) with the top roller (1)
above the throat plate.
- By turning the handwheel, set the feeder into its lower
position (below the throat plate).
- Loosen the screw (4) and set the wheel in such a way, so
that it rests on the throat plate insert.
- Tighten the screw (4).
Setting of the top roller (1) force
- Screwing in the screw (2), the pressing force of the top
roller is increased and inversely.
3.7.9.5 Replacement of the top roller
When replacing the top roller, proceed as follows:
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Unscrew the screw (1).
- Unscrew the screw (3) with the washer (2).
- Remove the driven top roller with the holder (4) from the
holder (5) and from the articulated shaft (6).
- Mount another top roller in inverted procedure to
dismantling.
- Set the top roller according to the par. 3.7.9.2.
