I was sewing today and the bobbin thread hung up, cleaned off, then re-threaded machine. The bobbin thread would not catch the upper thread. Took plate off to check sequence of rotating bobbin hook, it's in correctly. cleaned the feed dog area, re-threaded again. Still it won't catch with upper thread. HELP!!!!
Make sure your needle is in correctly. Check your threading again.
If that does not work, remove throat plate, install new needle, turn hand wheel until needle is at its lowest position and observe if the hook is exactly behind the eye of the needle. If that is correct then you do not have threaded correctly. If it is not then the machine needs to be re-timed.
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1. Clean up any loose thread in the bobbin area.
2. Pull on the bobbin thread while it is out. It should give a tension that is equal to the top tension of three. You'll have to approximate. Adjust the screw tension on the bobbin. It is the screw nearest to the thread exit hole on the side.
3. Put it back in.
4. Now, the top tension should be at about three. If it still allows a little wad on the bottom of the fabric you can adjust the top tension by tightening a small amount and monitor each time you adjust. The wad should go away.
There may be a broken thread in the bobbin case effecting the lower thread tension. clean all parts and determine if the upper thread or lower thread is breaking if cleaning does not help. double check your machine threading and bobbin installation direction. http://www.mastersewusa.com : this site has many operator manuals if the above suggestion does not help.
There are a few easy and free things to check:
1- try a new needle
2- check that the needle is inserted the right way (one side has a long slot, usually this goes toward the back of the machine)
3- flip the bobbin over
4- clean any stray threads/fluff in the bobbin area
Another possibility is that the machine's timing is off- the bobbin thread isn't in place to be picked up at the right time- and that would need to be fixed by a sewing machine mechanic. But if this started suddenly, and not after hitting a pin or otherwise jarring the machine, then it probably can be solved with one of the easy/free solutions above. Good luck!
youch! how frustrating. It sounds like there is a piece of thread caught in or around the bobbin casing. take the whole casing out and clean with your brush.
I feel your pain, hope this helps. If not, please come back and we'll try some other things.
We had he same problem with no solutions posted. Solution: First, make sure the bobbin case is clean. Ours was slightly rusted. The rust acted like a fine sand paper keeping the thread from encircling the bobbin. We used an metal cleaning powder to remove it. we also noticed that the entire bobbin area of the machine was dirty and had oxidation on the metal. We cleaned that as well.
Second, we checked the hook's action. (We took off the ring around the bobbin and removed the bobbin case as well. we left the hook in the machine and then turned the machine. We watched for how well the hook grabbed the thread from the needle.) We noticed that the hook was slightly slow and was not grabbing the thread. The hole in the needle was slightly above the hook as the needle retreated and hook spun around.
To repair this, we took off the front plastic cover (the side facing the operator). There are screws on both sides of the machine for this. After the cover is removed, you will notice a flat bar going from top to bottom about 1/3 from the right of the machine. This bar has four screws. This bar is the timing adjustment for the bobbin hook. Loosen all four screws. If you turn the bobbin by hand, you will see the bar flex back and forth. Turn the bobbin all the way to the right and tighten the screws. The hook should now catch the thread properly.