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13. STANDARD ADJUSTMENTS
13. STANDARDEINSTELLUNGEN
13. REGLAGES STANDARD
13. AJUSTES ESTANDARES
13-12. Adjusting the thread trailing length after thread trimming (856A only)
e
r
5 mm
r
5 mm
2 - 4 mm
e
Stronger
Weaker
r
u
e
e
Should not touch
Longer
Shorter
r
161
All manuals and user guides at all-guides.com
I Standard position for upper thread feeding device
1032S
The standard position for the upper thread feeding device
is as shown in the illustration.
w
1. Loosen the set screw q.
2. Turn the base w so that the end of the wire e is at a
3. Tighten the set screw q.
y
q
t
4. Loosen the two bolts y.
5. Move the wire e to the left or right so that the end of
B
6. Tighten the bolts y.
A
Seen from direction B
A
t
e
0.5 mm
1033S
I Adjusting the upper thread trailing amount
1034S
The standard upper thread trailing amount after thread
trimming varies as shown below depending on the type
of thread used.
y
w
If adjustment is necessary, adjust the position of the wire
e as described below.
1. Loosen the set screw q.
2. Turn the base w to adjust the vertical position of the
q
t
B
A
3. After adjusting, tighten the set screw q.
Seen from direction B
A
t
e
0.5 mm
1033S
ZE-855A,856A
position 5 mm below the position where the upper
thread r passes.
* At this time, keep the end of the wire e 0.5 mm
away from surface A of the part where the thread
guide t is installed.
the wire e is 2 to 4 mm from the top-left edge of the
thread guide t.
Upper thread
Upper thread trailing amount
nylon 100D 1 X 3(Z)
#60 spun
end of the wire e.
•
To increase the upper thread trailing amount, raise
the position of the wire e without letting it touch
the upper thread r.
•
To decrease the upper thread trailing amount,
lower the position of the wire e without letting it
touch the thread guide t.
* At this time, keep the end of the wire e 0.5 mm
away from surface A of the part where the thread
guide t is installed.
Note:
If the tension of the pre-tension y is to strong, it
will be more difficult to adjust the upper thread trail-
ing amount.
The pre-tension y should be adjusted to as weak a
tension as possible while still allowing the rotary
disc u to rotate smoothly.
*
The thread tension will change at this time, so
be sure to re-adjust the upper thread tension.
(Refer to page 131.)
50 - 60mm
40 - 50mm
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