APPENDIX
dWhile holding the bobbin in place with your finger, pass the thread through the slit in the needle plate.
•Hold down the bobbin with your right hand, and then pull the end of the thread around the tab with your left hand.
aTab
bHold down the bobbin with your right hand.
Pull the thread to pass it through the slit in the needle plate, then cut it with the cutter.
cSlit
dCutter
Sewing with the correct thread tension is possible after the bobbin has been correctly installed in the bobbin case.
■Symptom
•The thread becomes tangled on the lower side of the fabric.
•After starting sewing, a rattling noise is made and sewing cannot continue.
•Looking under the fabric, there is tangled thread in the bobbin case.
■Cause
Incorrect upper threading
If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise.
■Remedy/check details
Remove the tangled thread, and then correct the upper threading.
aRemove the tangled thread. If it cannot be removed, cut the thread with scissors.
•For details, refer to “Cleaning the race” on page 149.
bRemove the upper thread from the machine.
cRefer to the following steps to correct the upper threading.
•If the bobbin was removed from the bobbin case, refer to “Installing the bobbin” (page
26)and “Remedy/check details” in the section “Upper thread tightened up” (page
151)to correctly install the bobbin.
152