Adjusting The Thread Tension; Adjusting The Thread Take-Up Spring - JUKI LK-1941 Manual De Instrucciones

6. Adjusting the thread tension

G and Z types
Short
1
Long
4
2
5
H type
Short
1
Long
2

7. Adjusting the thread take-up spring

G and Z types
1
H type
1
22
3
3
3
2
4
3
2
4
If thread tension controller No. 1 1 is turned clockwise,
the length of remaining thread on the needle after
thread trimming will be shorter. If it is turned
counterclockwise, the length will be longer.
Shorten the length to such an extent that the thread is
not slipped off.
Adjust the needle thread tension with thread tension
controller No. 2 2, and bobbin thread with 3.
It is not necessary to normally adjust auxiliary thread
tension 4 attached to G and Z types. However, turn it
counterclockwise to decrease the thread tension when
needle thread slips out of thread guide wheel 5 and
the thread guide wheel does not stably turn.
The standard stroke of thread take-up spring 1 is 6 to
8 mm, and adjust the tension in accordance with needle
thread tension.
1) Adjusting the stroke
Loosen setscrew 2, and turn the whole of thread
tension 3.
2) Adjusting the pressure
Insert a screwdriver into the slit of thread tension
rod 4 and turn it while setscrew 2 is held
tightened.
3) When the stroke of thread take-up spring is
changed, adjust the thread breakage detector plate
referring to Page 43.