Problem with spinning bobbin case base of my Pfaff 360 sewing mac
I was sewing on an upholstery project when I suddenly felt metal
dragging on metal, when apparently the needle shaft began rubbing on
some portion of the hook/bobbin housing. I checked below and found that
the bobbin case base was not in the usual position, so I reached over and slowly turned the balance wheel.
I was horrified to find that not only was the rotary hook assembly
spinning like it is supposed to, but the bobbin case base was spinning
along with it.
Re: Problem with spinning bobbin case base of my Pfaff...
On lockstitch machines with rotary hooks the base[the bit the spoolcase fits in]is held in place by a retaining finger,tip machine back and you will see a long finger with a right angle lug sticking out approx 4/5mm .loosen the screw holding the finger only slightly and spin the base till the top of the base is at the 12.00clock pos.[it will help if you take needle plate off]the lug fits into the cut out of the base.then tighten finger screw and try.
if base is jammed you will need a mechanic to dismantle hook and repair and retime the machine.
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The bobin may not be in correctly. When looking at the bobin, with the thread threaded through the bobbin case, make sure that it spins counter clockwise. Also the problem could be caused by the machine not threaded correctly. But it is more likely the bobbin case and bobbin
First, make sure there is no debris and scraps of thread in the bobbin area. I'm sure you did that already. I assume you also tried it with another thread just to be sure. I would suspect that the timing went out of whack. The machines depend on a synchronization between the needle motion and the bobbin action underneath. I once had a Singer that slipped and I had to reset the timing. If it is the timing synch problem then it would happen consistently and not work sometimes and then not work other times. G
try changing the needle
when sewing a project-- the needle & fabric & thread must be compatable check to see if there is any burrs on the needle plate or on the bobbin case always make sure every thread guide is used make sure the bobbin is inserted correctly in the bobbin case
Drop the filled bobbin into the bobbin case with the bobbin spinning counter clockwise, slide the thread into the **** in the metal part of bobbin case at the 6:30 position, drag the tail of the thread to the right and rear of the machine.
A question to help determine what's happening with your machine(s).
Open the bobbin case so you can see the bobbin area. Begin by trying to turn the handwheel towards you and watch as the needle attempts to go up/down. If you cannot turn the handwheel towards you, turn it slightly backwards then forwards. Does the needle hit the bobbin case as it comes down?
If yes, your machine is out of time and will require a professional technician to repair.
If the above is not the case, there may be thread jammed behind the bobbin case or wrapped around the inner parts of the take-up lever.
Either case - a Pfaff authorized technician would be your best bet for a proper repair.
Best of luck with your machines - it's just awful to not have the at the ready for all our projects!