Pq1500
I have two of these machines. I love both of them. One of them makes a clacking noise at high speed straight stitch. The other one doesn't.
They are both very clean. And oiled. There are no threads wrapped around anywhere. I have taken the bobbin cover off and inspected. Nothing seems amiss.
It is threaded correctly. The bobbin is an official
Brother bobbin. I have switched out bobbins in case one was warped. They all work fine in other machine.
I have tried different size and brand and types of needles and various threads in bobbin and On top. I tried different presser feet and fiddled with the pressure knob on top. Tension is fine. It sews beautifully.
I don’t think it is “user error” at this point.
one clue is a different bobbin case helps just a tiny bit, I think.
the Facebook group tried hard to help but a lot of people said their machine makes that noise too.
Any other ideas? I may end up taking it in one day but want to see if it is something I can do.