I have a Bernette 715, and I have been having an issue with the feed dogs lately. When I am in the middle of a seam, the feed dogs will drop. I can pop them back up and continue, but it will do the same thing again just a couple of stitches later.
I cleaned out the inside of the machine, but the problem persists. I included a few photos of the machine and the feed dog lever. Any help would be greatly appreciated!
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As another has said in a previous reply, this sounds like a worn spring and it's not a home DIY if you don't have the service manual. The best, only solution is to take this machine to a professional - preferably one adverting him/herself as factory trained.
I'm having the exact same problem since May 2016. I think it may be something with the spring on the feed dog, but haven't been successful fixing it yet. I can't see anything else that could be causing it to disengage. The machine has been retired until I can afford to get it fixed. If there's something a nonprofessional can do to fix it, I'd love to know too.
My material will not feed on my machine
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