Common sewing machine faults and their remedies

Site:	Access Edu Solutions
Course:	SEWING MACHINE OPERATION
Book:	Common sewing machine faults and their remedies

Printed by:	Guest user
Date:	Thursday, 21 November 2024, 3:26 PM

1. types of sewing machine faults

There are various types of sewing problems or faults which arise during sewing. They include;

1. Skipped stitches,

2. Stitches looping,

3. Fabric puckering,

4. Variable stitch density,

6. Bobbin thread breakage,

7. Needle thread breakage,

8. Thread fusing when sewing machine stops.

9. Needle breaking.

10. Fabric not feeding.

1. Skipped stitches:

SL No.	Causes	Remedies
01	Needle too fine for the thread	Use correct size of the needle
02	Irregular thread tension on upper or lower loop.	The tension of thread should be adjusted.
03	Due to needle bent/blunt	Needle should be changed.
04	Work pulled when machining	Do not pull the fabric when stitching
05	Needle wrongly inserted	Insert needle correctly
06	Needle too long or short.	Set the needle correctly

2 stitches looping

SL No.	Causes	Remedies
01	Incorrect threading	Thread correctly
02	Upper or lower tension too lose	Use the correct tension
03	Two weights of thread used	Use similar thread weight
04	If sewing threads are not lubricated.	Better quality threads must be used here.

3. fabric puckering

SL No.	Causes	Remedies
01	Needle too coarse for the fabric	Use correct needle
02	Stitches too long in case of very fine fabrics	Use correct size of stitches For sheer fabrics use tissue underneath the work
03	Incorrect adjustment of needle and thread size.	Needle size and thread size should be changed.
04	Due to defected motion of feed dog	Feed dog motion should be adjusted
05	If fabrics not controlled properly in the feed mechanism.	Accurate pressure of pressure foot should be adjusted.

4. Variable stitch density:

SL No.	Causes	Remedies
01	Incorrect unwinding of thread form package during sewing.	The position of thread guide should be 2.5 times higher than the position of thread package.
02	Twisting of needle thread in the bottom of thread package.	Foam pad should use to the bottom of thread package.
03	Twisting of thread in thread guide.	Correct threading of sewing thread during sewing.
04	Excessive tension of thread.	Tension of thread should be less or use of higher strength threads.
05	Using of broken check spring.	Check spring should be changed.
06	Fraying of thread in the needle.	Finer threads should be used or to be used heavy needle.
07	Becoming more heated of sewing thread.	Needle lubricant and needle cooler should be used.
08	Becoming more heated of hook.	Lubricant should be available and test the distance between needle and hook.
09	Using of low-quality sewing thread.	Sewing thread should be changed.

5. Seam puckering:

SL No.	Causes	Remedies
01	Higher thread tension.	Bobbin tension should be kept as low as possible.
02	Improper thread balance.	Proper thread balance should be ensured between top and bottom thread.
03	Incorrect thread types.	Have to maintain tension guides properly.

6. Bobbin thread breakage:

SL No.	Causes	Remedies
01	Incorrect winding of threads on to the bobbin.	Proper winding of threads on to the bobbin.
02	Excessive tension to the bobbin threads.	The tension should be adjusted to the bobbin threads.
03	If the edges bobbin case, looper eye and so on are more sharpened.	The edges should be smooth.
04	Incorrect fitting of bobbin case.	Test the size and type of bobbin.

7. Needle thread breakage:

SL No.	Causes	Remedies
01	Incorrect winding of threads on to the bobbin.	Proper winding of threads on to the bobbin.
02	Excessive tension to the bobbin threads.	The tension should be adjusted to the bobbin threads.
03	If the edges bobbin case, looper eye and so on are more sharpened.	The edges should be smooth.
04	Incorrect fitting of bobbin case.	Test the size and type of bobbin.

8. Thread fusing when sewing machine stops:

SL No.	Causes	Remedies
01	Faulty sewing thread.	Should be used better quality thread.
02	Densely woven fabric which is poorly finished.	Should be improved fabric finishing.
03	Damaged needle after sewing thread breakage.	Should be changed the needle.

9. Needle breaking

s/n	causes	Remedies
1.	Needle too fine for the fabric	Choose correct size for the fabric
2.	Needle not inserted correctly	Correct insertion of needle
3.	Pressure foot incorrectly inserted	Correct pressure foot insertion
4.	Needle is bent	Use straight needle
5.	Machining over pins	Remove pins from work before machining

10. Fabric not feeding

s/n	causes	remedies
1	Feed dog of incorrectly set	Correct feed dog setting
2	Stitch length regulator turned to 0 in some machines.	Adjust stitch regulator to desired stitch
3	Pressure foot or feed dog bend	Replace pressure foot or feed dog
4	Blunt feed dog	Replace feed dog