I have replaced the needle, re threaded the machine and bobbin. I am at a loss as what to do to resolve the issue. Any help would be much appreciated
Adjust the top thread tension to tighter
SOURCE: i have the basically the same problem. i was
Check the easy stuff first:
Make sure the needle is inserted in the
machine properly- a good rule of thumb is the flat side of the needle
should go to the opposite side of the last thread guide. Also make sure
the machine is threaded correctly.
the needle is in correctly with the flat side to the rear of the
machine, make sure to thread the upper and lower portions of the
machine correctly.
the needle is in the machine correctly- all the way up into the needle
bar, make sure that it is threaded correctly, etc. If this all checks
out ok, take the bobbin case out of the machine. There are two ears on
either side of the bobbin case- turn the left one to the left and the
right one to the right. Remove the silver ring, and inspect the piece
of metal that the ring came off of (looks like a circle with the top
cut off). You have to locate the hook which is the piece that looks
like a half moon inside the big round metal piece. Locate the tip of
it, turn the handwheel toward you until the needle is in the lowest
position, at this point the tip of the hook should be flush with top of
the left side of the cut off circle. If this is not so, your machine
needs to be re-timed. If that is the case.
SOURCE: Why won't my Bernina Activa 140 sew the blind hem stitch?
Are you absolutley sure you're not getting a problem with stitch formation on, for example, wide zig-zag. Check again, using a different colour top and bottom and make sure that the stitch is being formed properly with only the top colour on top and bottom colour on the bottom. It sounds as though the bottom loop is not being picked-up by the hook properly. Make sure you've thoroughly cleaned-out any fluff under the stitch-plate and remove the hook/shuttle and give the hook race a good clean and give it a single drop of oil, even if you've got the lightweight part-plastic hook/shuttle fitted.
SOURCE: Kenmore sewing machine jams and breaks the needle
always make sure the needle is inserted correctly and all the way
up into the needle holder
try a different bobbin
make sure the bobbin is turned the right way in the bobbin case
make sure the bobbin case is inserted correctly in to the machine
if it's a front or side loading bobbin case
make sure the top thread has not come off the top thread take up
lever
Needle breaks
1.the needle is damaged
2.the needle is not correctly inserted
3.wrong size needle for the fabric
4.the wrong foot is attached
5.the needle clamp screw is loose
6. Top tension is too tight
7. Machine could be out of time
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