TROUBLE SHOOTING: CAUSES AND REMEDIES

THREAD FORMS LOOPS

CAUSE

REMEDY

Thread tension not properly regulated

Needle thread properly threaded and/or bobbin thread not properly wound

Thread size not suited to fabric

Thread check spring not working properly

Read instructions for regulating needle-and bobbin thread tension Thread machine properly and/or wing bobbin thread correctly

See Size of needle and thread

Have spring replaced

 

SHRINKING OR PUCKERING OF THE SEAM

Tension too tight

Read instructions for regulating needle-and bobbin thread tensions

Sewing foot pressure too strong

Read instructions for regulating sewing foot pressure

 

IRREGULAR STITCHES

Needle and bobbin threads of poor quality

Use top quality threads

Bobbin thread unevenly wound

Re-wind bobbin

MACHINE DOES NOT RUN FREELY AND MAKES A NOLSE

Machine needs oiling Dust and thread in shuttle

Wrong oil used, has now clogged machine Drive belt tension too tight

Read instructions on how to oil

Read instructions on how to clean shuttle race Clean machine carefully and re-oil with top quality oil Loosen tension of drive belt

TROUBLE SHOOTING: CAUSES AND REMEDIES

 

NEEDLE THREAD BREAKS

CAUSE

 

REMEDY

Needle not properly threaded

 

Thread properly

Thread tension too tight

 

loosen tension

Something wrong with the needle

 

Replace needle

Thread is too heavy for needle

 

Change

Thread check spring is broken

 

Have a new spring fitted

Needle not properly inserted

 

Insert needle properly

Needle plate, shuttle or sewing foot damaged

 

Replace

 

BOBBIN THREAD BREAKS

Bobbin thread entangled because of incorrectly wound bobbin Bobbin thread not under tension spring on bobbin case

Wind bobbin correctly Thread bobbin correctly

Needle not properly fitted on needle bar Needle bent or blunt

Needle worn

STITCHES ARE LEFT OUT

Fit needle properly

Replace

Replace

Needle bent

Needle not properly fitted Fabric too heavy or too hard You are pulling on the fabric

NEEDLE BREAKS

Replace

Fit needle properly

Use needle of correct size

Do not pull

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Euro-Pro 372, 374, 377, 373 instruction manual Remedy

374, 372, 377, 373 specifications

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