Adjusting The Lower Position Of The Transfer Body - ELNA E9020 Service Manual

(24) - 2 Adjusting the lower position of the transfer body

Set the main shaft to 40˚ (marker dot on the hand wheel comes right
above). Or, turn the groove on the upper section of the driving shaft
with a screwdriver to set the transfer body to the lower position.
1) Checking the change-over of the retaining pressure change-over
camConfirm that the retaining pressure change-ovrer roller has
moved from cam A of the transfer body cam to cam B when the
transfer body is in the lower position.
<When the rooler has not moved>
[Adjusting the change-over timing of
the retaining pressure change-over
cam]
Loosen screw 2 and move 1 up or
down to adjust the timing in the case
where the retaining pressure
change-over roller has not moved
from cam A to cam B when the
transfer body is in the lower position.
(At this time, be careful of the
backlash.)
* When performing this adjustment,
re-adjust 1), 2) and 3) of the upper
position adjustment of (24) - 1.
2) Longitudinal adjustment of the lower position
Loosen screw 3 and adjust the longitudinal position of 4 so that
the installing plane of the transfer body is level at the lower position
as shown in the figure.
At this time, the distance from the top end of the transfer body to
the front of the presser holder has to be 4 to 5 mm.
How to adjust
3) Vertical adjustment of the lower position
When a thread is set to the transfer body and the transfer body is
placed in the lower position, loosen screw 2 and adjust the vertical
position so that the thread stretched tight in front of the needle is
in the center of the needle eyelet.
Roller
Cam A
Cam B
4) Adjusting the retaining pressure change-over link
Loosen screw 3 and move 4 up or down to adjust so that the
clearance provided between the thread presser plate and the top
1
end of the transfer body is 0.5 to 1 mm when the change-over
2
roller rides on release cam (C) on the way of returning motion of
the transfer body.
* When performing this adjustment, perform (24) -1 -3) Adjusting
the thread retainig pressure at the upper position.
2
0.5 to 1 mm
Adjustment drawing
3
Thread
4 to 5 mm
1
C
4
Level
Transfer
body
2
3
4
30