Howdy/Hello.
I've got a mystery that I am trying to figure out for my Sieck-branded 441 clone. There is a mysterious clang that has been around since I got the machine but I've always thought of it as part of the machine-spirit so to say.
Recently, after getting some new presser feet, I've been doing some work to adjust the machine and started to understand that other clones just don't have this type of issue.
I've attached a two videos. The one that is normal speed is with sound and you can hear the clang. The other video is a slow motion of the bottom bobbin mechanism. I have noticed it seems to pinch the thread between the moving parts - not sure if it is intended.
https://imgur.com/Cm3WFKn
https://imgur.com/LIIctAc
Thank you in advance. If I am missing some things, then I will update asap.