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DO ANY PARIS AtOtifi THREADPATHHAVEROUGH
SURFACESOR ARE ANY DAMAGED?
YES - Replere damuqed parts
NO
IS BOBBINCASE PROPERLYTHflfADEB?
NO- Remseri hobhm rose
YES
i,
IS BOBBINENtIRElY ERE| TOROTATEINSIDECASE?
YES - Replete damaqed part
NO
+
IS TENSIONOF BOBBINCASESPRING CORRECT?
N(I. Re_et tensmn refer to 5cotton _C
YES
i,
IS BOBWNTHREADEVENLYWOUNDON BOBBIN?
NO- Rewind the hubhm thread
CheEksmoOlll+lessoi hohhmcase ions,offspfmg god
thread path along hohbm Easeand needle plate
Check thai bobbin rotates tountlrcl_kw_se whdl
ih,ead rs pulled Check that thread posses under
hohhm (ase tension swing
Damaged bobbin or bohbmcase ell enlerfere _lh
smooth feeder of thread
R thread ,s not evenly woundon bobbmn ell not
oovwnd smoothly
IS TENSIONOtt TOPTHREADANDBOBOINTHREAD
BALANCED?
NO - Adfusliensmn of lop ffwead and of bol_', thread to
obiam good Balance Refer Io ..eectron5C
YES
IS NEEDLETiP DAMAGED?
YES- RepUte needle
NO
t
ISNEEDLESIZESUITABLEFORTHREADANDFABRIC?
NO- Select sudable smzeneedle foe the fabric Refer to
Sechon 58
YES
t
I_ UPPERTHREADPROPERLYTHREADEDBETWEEN
TENSIONDISCS?
NO - Do upper tlweadmg ruth presser fool hired so thai
tone,on d_scsare open
YES
IS PRESSUREONPRESSERFOOTCORRECT?
NO * Sll IXess_e knob on posmon3 for normal sarong.
,i_relse preservefor h_lf fl_l(;, decrease,t for thick
IOB.€
YES
IS CHECKSPRINGEUNCTIONINGPROPERLY!
NO- Replace tansies group Refer io $e+hon 2C !
YES
ARETENSIONDISCSWORKINGPROPERLY?
NO- Replace tonsron group Refer to Section 2C I
YES
t
Loose shith#$ otcvr whelr top thread teusiolz Is tPt3
loose Of bobbin thread i+ too tight
Sewer sheer fabt.r '_,th needle site larger fhaJI I0
may _ausn puckering
Check smooth movemeni of check spring several
limes mlh finger
Threadmachine fromspoolio take uplever ond check
ther threadflows heely betweeniensmn (kscswhen
pfessln font la raised, v_lo €Oqre¢ituns,,Jnis made
on El#earlwheni_esar foot is lowered Ch_:kto see
11111frt¢iion on llwod loTrtaste w_n fellllOfl kl_ll IS
roilted IO_nud h_mr vl_oos
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