JUKI MEB-3200 Engineer's Manual page 87

1. Assemble needle bar rotary timing belt ! 3 , and assemble rotary pulley support A 5 and rotary pulley
support B, left and right, 7.
At this time, remove the play of needle bar rotary pulley ! 7 so that rotary torque (load) of needle bar
rotary pulley !7 does not become large.
2. Place needle bar rotary timing belt !3 , pass rotary upper pulley 8 through rotary shaft, move rotary
shaft upward (in the reverse direction of arrow mark B) and insert it in the machine arm section. When
placing needle bar rotary timing belt !3 , face to the front in advance the looper bracket, the needle bar
and clamp screw 9 in rotary upper pulley 8.
3. Adjust setscrew !1 in thrust collar !0 and setscrew !3 in rotary lower pulley !2 to the flat work of rotary
shaft !8 , and tighten them respectively. At this time, remove the play of rotary shaft !8 such a way as
holding the machine bed with thrudst collar !0 and rotary lower pulley !2 .
4. Determine the vertical position of rotary upper pulley 8 so that needle bar rotary timing belt !3 is level
and temporarily tighten clamp screw 9.
5. Adjust the belt tension of the needle bar rotary timing belt according to "(27) Adjusting the tension of the
needle bar rotary timing belt", and tighten setscrew !5 .
6. Make sure of the position of the rotary sensor slit according to "(30) Adjusting the position of the looper
bracket". When the position is changed, re-adjust the position.
7. Adjust the center of the needle according to "(1) Adjusting the center of the needle".
(Caution) When disassembling / assembling needle bar rotary timing belt !3 or needle bar components,
the center of the needle changes. Be sure to check or re-adjust the center of the needle.
8. Make the rotary timing on the needle bar side correspond with that on the looper side according to "(29)
Adjusting the position of the needle bar rotary pulley".
9. Perform the adjustment such as "(5) Timing between the needle and the looper, (6) Clearance between
the needle and the looper, (8) Installation position of the spreaders and the timing to open/close the
spreaders, etc.".
5
1
7
Caution in assembling
7
!7
!4
!5
!3
3
83
− −
2
8
9
2