© ANITA
MP03500EN_180831
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20. ADJUSTING THE PRESSURE OF BOBBIN THREAD
Fig. 20
Fig. 21
There are two adjusting methods
Method1:
Adjusting the elastic sheet in shuttle, to pull open sheet (showed as Fig.). To pull the sheet more
open, the bobbin-threads more pressure, conversely push close for less. Please attention, don´t let
the elastic sheet too lever to touch bobbin. There will create bobbin idle running, can´t control
bobbin-thread, let thread confused to lead twist. (As Fig. 20)
The function of elastic sheet
1.
Press bobbin don´t let it to idle running.
2.
Use sheet´s pressure to control the tension of thread.
**Adjust and correct:
1.
To pull bobbin thread with hand, until the tension is we need.
2.
If you feel the bobbin thread´s tension is too tight after adjust (elastic sheet is too open), you
can use screwdriver to make the bent line flat by pressure (as Fig.21)
Method 2:
1.
If the outside-threads in shoe float on surface, it means the thread is too loose, you can
tighten the screw of tension disc set on thread tension regulator assy.
2.
If the bobbin-thread float on shoe´s surface, it means the thread is too loose, you can adjust
bobbin-thread pressure with the above mentioned.
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