Duerkopp Adler 4120i-5, Инструкция по эксплуатации

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3.6.7.4 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.
3.6.7.5 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. 3.6.7.2.
3.7 Setting the presser foot lift
The maximum lift of the presser foot when lifting the foot with
knee lever or with electromagnet is to be „A“ = 12.5 mm.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Place a cube (1) having the height of „A“ = 12.5 ± 0.7 mm
under the presser foot.
- Screw in thoroughly downwards the screw (2).
- Tighten slightly the screw (3) in such a way that the lever
(4) turns on the shaft (5) with a certain friction moment.
- Push with the screwdriver on the lever (4), until it attains
the wall inside the arm of the sewing machine.
- Return the lever (4) back by about 1 mm and tighten the
screw (3). With the maximum top roller lifting, the lever will
not strike into the machine arm.
- Check the axial clearance of the shaft (5) which should be
the least possible.
- Using the screw (4) set the normal pressure force of the
presser foot.
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