Seems like the same problem I haad so I tried changing the needle looking for burrs or bent needle. maybe a piece of broken needle in the bobbin holder. or maybe the fabric requires a certain needle or the needle size is too big for the fabric you are using. or the machine needs cleaning I have started using canned air for this. and then if this fails then you should note the tension position and then try adjusting it one point at a time. always puting it back to where it was to start with good luck
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According to the manual, you should not need to adjust the bobbin tension (and I located other sites which stated the bobbin tension cannot be adjusted on this machine). Apparently, all the tension adjustment is accomplished through the upper thread::
"EN Thread Tension Upper thread tension Basic thread tension setting: "4". (1) To increase the tension, turn the dial to the next number up. To reduce the tension, turn the dial to the next number down. A. Normal thread tension for straight stitch sewing. B. Thread tension too loose for straight stitch sewing. Turn dial to higher number. C. Thread tension too tight for straight stitch sewing. Turn dial to lower number. D. Normal thread tension for zig zag and decorative sewing. Correct thread tension is when a small amount of the upper thread appears on the bottom side of fabric. Lower thread tension The bobbin tension has been set correctly at the factory, so you do not need to adjust it. Please note: - Proper tension setting is important for strong seams. - There is no single tension setting appropriate for all stitch functions, thread or fabric. - A balanced tension (identical stitches both top and bottom) is usually only desirable for straight stitch construction sewing. - 90% of all sewing will be between "3" and "5". - For zig zag and decorative sewing stitch functions, thread tension should generally be less than for straight stitch sewing. - For all decorative sewing you will always obtain a nicer stitch and less fabric puckering when the upper thread appears on the bottom side of your fabric. 1 A B C 22 D"
Doing further research, I found this statement on a machine review site:
"After reading reviews online from where I've bought my drop-in bobbin machines, I think many of the negative reviews are due to the bobbin thread coming up without laying across the bobbin. It can cause the stitches to look very sloppy and no amount of tension adjusting can fix the stitches."
There are several machine review sites wherein 4423 owners stated their disappointment in the 4423's performance. Some said the machine failed almost immediately and others said the machines developed problems when sewing heavy fabric.
Have you taken the bobbin out and made sure there is nothing caught in the bobbin race area. Maybe even unscrew the plate and take the whole bobbin race assembly apart and clean well. Once that is done put back together then re thread machine. Next I would start by hand turning the machine and doing some stitches slowly with the fly wheel make sure to to forwards only never turn the fly wheel back wards. If everything seems clear give it some power slowly and see how it goes.
The noise is because the machine is trying to raise or lower a needle and can't move. Several things to check. Did the needle break and jam in the bottom thread? Is the needle bent or jam? Did the thread jam in the bobbin area? I had a 'knot' of thread build up on the bottom and it hooked itself into the metal clip on the bobbin so that the needle couldn't raise. If thread jams in the bottom carefully cut the threads until you can free the hoop and material. Then check to make sure all pieces of thread and fuzz has been removed in the bobbin case. If it happens again check to see if the bobbin case or the throat plate is scratched or bent. If you are stitching Free Standing Lace on this machine or a piece with over 20,000 stitches I recommend starting with a new full bobbin and a new needle. As you get toward the bottom of the bobbin, thread seems to have a high likelihood of tangling or looping.
Several things to check. Did the needle break and jam in the bottom? Is the needle bent or did it jam in the bobbin area? I had a 'knot' of thread build up on the bottom and it hooked itself into the metal clip on the bobbin so that the needle couldn't raise. If thread jams in the bottom cut the threads until you can free the hoop and material. Check the bobbin for pieces of thread and fuzz. Check to see if the bobbin case or the throat plate is scratched or bent. If you are stitching Free Standing Lace on this machine or a piece with over 20,000 stitches I recommend starting with a new full bobbin and a new needle. As you get toward the bottom of the bobbin, thread seems to have a high likelihood of tangling or looping and will cause a jam which means the handwheel locks.
try changing the needle adjust the top tension one number or letter higher till the stitch looks normal clean under the needle plate & in the bobbin area for lint make sure the bobbin is not warped make sure the bobbin is inserted correctly into the bobbin case try rethreading the machine top & bobbin it's also possible that the machine could be out of time & needs to be checked at a repair shop
Start from the begining. Use your Instruction Book and make sure the machine is threaded correctly. Put in a new needle. Adjust the top tension to about halfway. Fit a fresh wound bobbin that does not have all sorts of different threads still wound on it(a bad habit with a lot of people). Make sure the bottom tension is correct. Make sure the bobbin is fitted corectly. Set the machine to do basic straight stitch(mid range stitch length). Try sewing and see if the problem is solved.
* Un-thread your machine and remove your bobbin. Clean any loose thread or lint out of your bobbin case. Re-thread your machine, reinsert and re-thread your bobbin.
* Change your bobbin There could be a nick along the edge of your bobbin spool that’s catching your thread as you sew.
* When you start to sew a seam, grasp the upper and bobbin thread tails. Hold them back and out of the way as you sew your first couple of stitches. This will keep them from getting caught in your machine.
Try these time savers:
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
To address my needle thread tangling (horribly) in the bobbin compartment, I rethreaded the bobbin. I cleaned the bobbin and the feeder feet, I changed the bobbin and the thread. I changed the tension on the needle thread and the bobbin thread. NO FIX! Then, I changed the needle - the problem was fixed instantly. I sewed awhile and then put the original needle back in. No problem. I think perhaps that the problem is being caused by the needle getting out of alignment somehow during sewing. If you are having the same issue, try it. It can't hurt!
I'm fifi1076, and I'm having quiet a good bit of trouble with my sewing machine.
I'm new at this site so I don't know if I'm doing this correctly or not so please forgive me if I do something I'm not suppose to do!!!!
I copied this question from off of this site for I wanted to make certain that whoever answers my question will understand that all of the question doesn't pertain to my problem.
"when we have it threaded the top thread keeps getting jammed up in the
bottom bobbin. if i redo the bobbin as shown in manual then the bottom
thread will not loop so it will stitch"
This is the only part that pertains to my problem...... when I have it threaded the top thread keeps getting jammed up in the
bottom bobbin......and I can't get it to sew at all....it won't do nothing.....the motor will just sit there and grind.
If whoever can help me with this and can give me a solution I will be forever gratefull