JUKI MEB-3200 Engineer's Manual page 79

1. Assemble needle bar driving gear 8 after performing the alignment of marker dots with the thread
take-up lever cam.
(Needle bar driving gear 8)
Alignment of
marker dots
(Thread take-up lever cam)
2. Refer the backlash of the gear to "5.- (3) Adjusting the backlash of the needle bar driving gear".
3. Select a suitable rock bearing 7 so that there is no play between the bearing and rock link 6.
Part No. of the rock bearing
Part No.
SB33500020A
SB33500020B
SB33500020C
SB33500020D
SB33500020E
4. 1) Pressing needle bar driving shaft 1 in
direction B, make the step section come in
contact with plane A of the machine arm and
fix the shaft.
2) Pressing needle bar driving shaft thrust collar
4 in direction B and fix it so that the play in
the thrust direction does not occur between
needle bar driving shaft spacer 9, needle bar
driving gear, rock link 6 and needle bar driving
shaft spacer 5.
Cautions in assembling
(Caution) White painting is applied to the periphery
Diameter of needle
+ 0.004 mm
+ 0.002 mm
Standard
– 0.002 mm
– 0.004 mm
75
− −
of the tooth corresponding to the marker
dot engraved on needle bar driving gear
8 and to the peripheries of the teeth on
the both sides corresponding to the
marker dot engraved on the thread take-
up lever cam.
6
8
5
B
9
7
A
Machine
arm
4
2