I have a Bernina Activa 135 Patchwork Edition, which I absolutely love! I hadn't used my machine in over a year, so I took it in for servicing before using it again. When I got it back, the feed dogs clunked. The machine buzzes when it has been on for a bit. I returned it to where I had it serviced. They supposedly reserviced it. They told me the feed dogs clunked because they needed oil and I should oil the bobbin area and that the Activa 135 is a noisy machine. I don't recall it ever doing this before. I called another sewing store that sells your product, they say I am being hosed. I have already paid for the service, I'm not keen to pay twice, but don't want to damage my beautiful machine.
1. is it a noisy machine, should it buzz?
2. Does the bobbin area really need oiling after its been serviced?
Thank you for your help.
First of all, the question is: does that machine buzz when it's turned on but without you stepping on the foot control? If so, the likely cause is the power supply board. It is not defective as such, but some boards (whether new or after some period of ownership) do have a buzz, and without question some boards are noiser than others. If that buzz bothers you, the only solution would be to have it replaced with another new or rebuilt one (which would have to be done through a Bernina dealer).
Second is the issue of the bobbin area needing to be oiled after it's been serviced. Assuming when you say it was serviced that it means you had the machine tuned-up, then the dealer THEMSELVES should have oiled this area when they did that service. The bobbin area does need to be oiled on a regular basis (once every 6-8 bobbins' worth of thread usage is a pretty good guide). It would be my opinion that the dealer you took the machine to is indeed feeding you a line (about the bobbin oiling right after service), and I personally would be trying another dealer should you need further service.
I service sewing machines in my shop and completely agree that they should have oiled the dogs themselves! I have recently dealt with that model and am willing to bet they lost a small spring that holds them down against the cam that moves them. As for the buzzing, it is likely the power PC board. A good Bernina dealer is your best bet. HTH
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