ELNA Transforma - Machine Is Noisy (with Stitch Width Set at 3 or 4)

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23. Machine is noisy (with stitch width set at "3" or "4")
Note:Whenamachineismakinganunusualnoise,tryto
narrowdownwherethenoiseiscomingfrom.
AMechanicsStethoscopeisanexcellenttoolforthistypeof
diagnosis.Thesecanbefoundforunder$10atHarbor
Freight.
Onesourceofnoisecouldbeexcessiveendplayintheupper
shaft.
Thefollowingprocedureisspecifictothefirstgenerationof
couplingdesigns,validuptoSerialNo663,199.
OpentheFrontCovertoaccesstheCounter‐Weightonthe
leftendoftheUpperShaft.
CheckthattheTake‐upLeverisnotinthewayofthe
Counter‐Weight.TurntheFlywheelifneeded.
RemovetheFlywheeltoaccesstheCouplingRing.
PressagainsttheCounter‐WeightfromtheLeftwhilealso
pressingagainsttheCouplingRingfromright.
CheckforendplayintheUpperShaft(intheaxialdirection).
Ifendplayisexcessive(max0.03mm/0.0012"),adjustas
follows:
LoosentheSetScrewintheCouplingRing.
PressinontheCounter‐WeightandCouplingRingtoremove
theendplay.
TightentheSetScrewinCouplingRing.
ReplacetheFlywheelandturntheUpperShafttowardsyou
toverifytheshaftturnsfreely,withoutbinding.
Ifthenoisehasnotbeeneliminated,checkiftheCradleSpringScrewisadjustedasexplainedintheChapter:
3. Centering of Needle Bar for Zigzag Stitch