Hello,
cmack has just posted in the Machines & Hardware forum of AmayaUsers Discussion
Boards under the title of Machine knocking and looped upper threads.
This thread is located at
http://www.amayausers.com/discussion/showthread.php?6054-Machine-knocking-and-looped-upper-threads
Here is the message that has just been posted:
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try a new bobbin case
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