I can quilt for a little bit, then the bobbin seems to jam and stop my "free motion" I have rethreaded the machine and bobbin, cleaned the bobbin area and changed the needle.
The Q E 4.2 does not have bobbin case clearance adjustment. The grey cover plate holds the bobbin case in the correct position. It sounds like a top thread tension issues or a speed issue. By speed issue I mean the speed of the needle compared to the fabric moving. For the tension issue I would suggest raising the top the tension by a half or full number a retry. The tension setting is in the tools menu. The bobbin case will only be an issue if it is out of position.
1. The top loading bobbin cases have small brackets to keep them from turning or moving up or down.
2. Adjust brackets with small screwdriver. Allow enough room for thread to flow through.
3. Rotate hand wheel both directions to make sure the bobbin case doesn't move around. Also, watch the thread to see if it is flowing across the top of the bobbin case.
4. You may need to slow down movement of your "free motion". Also, make sure you are using the right pressure foot.
When things hang up again, lift your fabric and look underneath, through the openings for the feed teeth in your needle plate. If you can see your thread caught on the front, right corner of the feed teeth (and it will just be caught on the corner) your feed height needs to be adjusted properly. When the teeth get too low they are actually below the bottom surface of the needle plate and the thread can hang up on them. When properly adjusted, they are within the thickness of the plate and this does not happen. I recommend having this checked by a qualified Pfaff repairman.
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