Automatic Needle Threading Mechanism; Adjusting The Upper Position Of The Transfer Body - ELNA E9020 Service Manual

(24) Automatic needle threading mechanism

(24)-1 Adjusting the upper position of the transfer body

1) Loosen screw 2 and adjust with 1 so that the installing plane of the
transfer body is level when the clearance provided between the lower
face of the upper section of driving shaft installing plate !0 and the
upper face 9 of the external working body is 2 mm.
<When the adjustment cannot be performed>
When the adjustment cannot be performed within the range of
adjustment with 1, check the position of 3.
• The normal position of 3 is, when the aforementioned upper position
(2 mm) is obtained, the place where the 凹 (concave) mark is almost
in the level position.
[To correct the position of 3]
1. Turn the groove on the upper
section of driving shaft using a
screwdriver and lower external
working body 9 by approximately
12 mm.
2. Loosen screw 4 and remove
transfer body (asm.) 5.
3. Return external working body 9
to the upper position (2 mm) and
install 3 to the normal position.
4. Lower again external working
body 9 by approximately 12 4
mm, set 5 and tighten screw
4at the position of 30˚ in the
direction of deflecting the spring.
How to adjust
2) Adjusting the origin detection circuit board
• Loosen screw 6 and
move 8 up or down
to adjust so that the
a f o r e m e n t i o n e d
upper position is
obtained at the origin
detection.
• Turn ON and OFF
the power to the
machine several
Groove
times to confirm.
* In addition, 8 and 7
should be pressed as
shown in the figure.
30˚
3) Adjusting the thread retaining pressure at the upper position
Loosen screw 2 and turn 1 to adjust the thread retaining
pressure at the upper position (origin) as shown in the figure.
Spring
5 1
2
Up
6
Down
To be pressed
7
8
State which is not
open.
(Immediately before
opening)
State which comes in
contact with each other
0.05 to 0.15 N
Mettler No.100
Mettler No.100 should be set with a 0.05 to
0.15 N (5 to 15 g) load.
29
Disassembly
Location of components to be adjusted
Adjustment drawing
!0
9
Transfer
body
Concave (asm.)
mark
Level
7
8
3
2
6
1