KD144s
FAQ et Diagnostic |
Upper thread tightened up
Symptom
|
(1) Lower side of fabric (2) Lower thread visible from upper side of fabric (3) Upper thread (4) Upper side of fabric (5) Lower thread |
Cause
If the lower thread is incorrectly threaded, instead of the appropriate tension being applied to the lower thread, it is pulled through the fabric when the upper thread is pulled up. For this reason, the thread is visible from the upper side of the fabric.
Remedy/check details
Correctly install the lower thread according to the following procedure.
Raise the needle by turning the handwheel toward you (counterclockwise).
|
(1) Mark on the handwheel |
Raise the presser foot lever.
|
(1) Presser foot lever |
|
(1) Bobbin cover |
Make sure you set the bobbin so the thread unrolls in the right direction. If the thread unrolls in the wrong direction, it may cause the thread tension to be incorrect or break the needle.
Hold the end of the thread, push the bobbin down with your finger, and then pass the thread through the slit, as shown.
|
(1) Tension-adjusting spring |
If the thread is not correctly inserted through the tension-adjusting spring of the bobbincase, it may cause incorrect thread tension.
|
(1) Groove |