Bernina 532-2 - Manual (Page 53)

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Useful Hints
Causes and Elimination of Little Troubles
Blockad Shutlla
tf the machine shuuld
fail to run either for­
ward or in reverse or
if an abnormally loud
noise ia heard, a thread
has become jammed in
the shuttle race owint;
to faulty manipula­
tion. In such cases,
the race can easily be
cleared. Raise needle
bar to its extreme po­
sition, depress sprint;
lever member 55 (on
the left of the shuttle
race)
with left-hand
thumb so that the lock-
b’i^. 7ti
ing bridge 56 can be swivelled down together with the shuttle race cover 57. After
removal of bobbin case and shuttle, it will be easy to remove jammed thread ends and
dust from the shuttle race. Do not use hard instruments, such as screw-drivers, etc., to
avoid damaging the shuttle race. After cleaning, first replace shuttle, and swing the
locking bridge 56 and shuttle wall cover 67 into position shown in Fig. 78. Then press
with the thumb on the spot marked with an arrow until the locking bridge rams home,
and finally replace bobbin case. Make sure that the locking bridge is properly engaged.
Top Throad Broakage
Needie of inferior quality, badly polished needle.
Needle not properly inserted. Long groove must face front.
Needle blunt or bent.
Needle too fine in relation to thread used.
Top thread tension too tight.
Thread passages not polished.
Thread control spring broken.
Needle hole in throat plate damaged by needle, requires repolishing.
Shuttle point has become too sharp by needle action (Call mechanic).
Shuttle race not oiled.
Inferior thread or knotted thread.
Thread dried out in storage. Threads should never be kept in heated rooms.
Boltom Thread Breakage
Bottom thread tension too tight.
Bottom thread not properly wound on bobbin.
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