Jamming is probably one of the most frustrating problems you might have to deal with when working on Juki or other sewing machines. Many things, from knotted thread to an out of whack adjustment, can cause jams on the Juki F300 and other sewing machines.
The good news is that as frustrating as jamming may be, there are easy ways you can remove jams and troubleshoot the machine to prevent another one. Use these tips below to control and prevent jams and get back to sewing.
Inspect the Bobbin
Many jams are the result of a problem with the bobbin. When a jam happens, remove the bobbin and look at it. Is it the right bobbin for the machine? Although they look the same, some sewing machines use bobbins that are slightly different than others. What about the condition of the bobbin?
Dings, scratches, and dents can interfere with bobbin function and result in a jam. Is the thread wound evenly on the bobbin? If not, put in a fresh bobbin that has been correctly wound to ensure the thread feeds evenly.
Rethread the Sewing Machine
Threading issues are another common cause of jamming if the thread does not flow smoothly from the spool to the needle. Begin by unthreading the entire machine and cleaning it. Check all places the thread passes through to ensure there is no residual lint or fibers. Carefully rethread the machine and test the thread tension. If the tension is off and your Juki F300 is not stitching properly, adjust the thread tension.
Put In A New Needle
Dull or damaged needles can contribute to Juki or other sewing machines becoming jammed as they can pull fibers up into the thread while stitching. A jam can damage needles even further. Rather than risk a worse problem, remove the needle and replace it with a new one to eliminate this possibility.
Keep the Machine Clean and Maintained
Jamming can also occur from something as simple as lint under the throat plate or pieces of thread stuck in the tension disks. Periodically take the machine apart and give it a good cleaning, paying particular attention to the bobbin area, the tension disks, the thread guides, and any moving parts.
Sewing machines should be oiled periodically according to user manual instructions. In some cases, they may need to be professionally serviced. By providing this easy, yet essential care, you will be taking the first step towards preventing frustrating jams that can lead to wasted time and machine damage.
When sewing machines are jammed, the simple steps above will usually take care of it. Although you should be able to clear a thread jam fairly easy, it is also important to take steps to prevent it from happening again.
Keep Juki sewing machines like the Juki F300 clean and properly maintained, thread tension correctly adjusted, and use the correct, properly wound bobbin. If jamming continues, your machine should be looked at by a professional sewing machine repair shop who can get to the bottom of the problem!