SEWING MACHINE OPERATION

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

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.

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.

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.

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.

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.

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.

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.