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of feed
Adjustment
2.
Requirement: The clearance between driving-shaft bush 4a and left housing edge 3a must
(ltg 2a)
po
Check: lt must be
ssi
the feed-dog driVing shaft and the left housi n g edge.
Note:
This adjustment must only be carried out when compelling reasons exist.
Adjustment:
Disconnect mains plug from mains socket
•
•
Remove needle and sewing fool.
•
Tilt the machine over backwards.
Remove the baseplate and the bobbin thread monitor.
•
•
Remove five-wire flat cable 126 complete with the buttonhole
Take seven-wire flat cable 200 of the transverse-drive stepping motor out of the cable duel.
•
Dismantle transverse-drive stepping motor according to section
•
•
Disconnect spring 14 (fig. 2b)
Sc
•
r ew out screw 18.
•
Turn the handwheel until the
Fold
•
cam lever 9 down and remove
•
Remove slide block 12
•
Loosen screw Sa (fig.
• Pull out pin Se to the rlghl
• Loosen screws
3
and 7.
• Re-position driving shaft S together with the two cylindrical pins 4 and 6 sideways without play until
there Is a clearance of 3.0 mm at the left side, as described In "Requirement" (fig. 2a).
•
Tighten screw 3.
• The pressure of the right cylindrical pin must be 1 kg.
•
Tighten screw 7.
5c
Fi t pin
without any play
•
Di sco nnect spring 8 .
•
• Remove the need le plate.
pull
Use your finger to
•
feed
•
The complete
driving shaft S must slide
(fig.
•
Loosen screw 1
2
7
• Move the top feed lever assembly to the front and rear.
The complete top feed lever assembly must move easily and without binding (If necessary remove
•
cause of binding).
•
Re-position crank pin 173 with pull rod 171 sideways until the complete top and bottom feed
moves easily.
• Tighten screw 172 and check again wheter the
• loosen screw 16 (fig.
•
Push slide lever shaft 1S complete
with
•
Push slide block 12
•
Check whether slide block 12 can be moved easily, but without play or binding,
within the slide
way.
•
Push slide lever shaft 1S with stepping motor 17 carefully to the left until
between
of 0.05 mm
• Tighten screw 16 and check whether the slide block moves easily and without play.
0
• Push link 1
complete
• Push cam lever 9 to the rear, and then upwards over
• Insert screw 18 in stud 19 and tighten lt a littl e .
• Move stud 19 sideways until link 10 and connecti n g rod 1 1 still have a sli g ht play and move easily.
• Tighten screw 18.
two
• Connect the
springs 8 and 14 (fig.
8
dog driving shaft in sideways direction
ble
se
in
rt adjustment gauge 00-880133-01 easily, but
to
lobe of
driving eccentric 20 faces
it with
link 10 to the left, pulling
with
to
spring
the right.
2a).
tighten screw Sa.
and
feed dog to
front.
the
the
2c).
2b).
with
stepping motor 17 about 1 mm to the right
onto
spring
the pin and in
slide block 12 and connecting bar 1 1 .
wi t h
cam lever 9 to the right onto the connecting bar pin.
2a
and 2b).
sensor.
38.
rear.
them oft
then release il
slowlY
to the rear.
feed
system moves freely.
stall it
in slide way 13 in the correct
feed
eccentric 20.
be:
3.0 mm
without
play, between
rod.
the connecting bar
curve
radius.
there Is
a clearance
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