Whenever you see loops on the underside of the fabric something is snagging the thread. the biggest culprit is burrs on the hook. the hook is what goes round and around the bobbin. The reason for burrs on the tip of the hook areseveral
ONE ...is by helping the fabric through as the machine is doing the sewing which directs the needle too close to the hook thus scarring the smooth surface of the hook and potentially breaking it off and the needle too. You must allow the machine do it on its own and only guide the material.
TWO...Sometimes if you are sewing s-t-r-e-t-c-h-y double knit material the material calls for a ball point needle. I have gotten good results with the Singer brand YELLOW BAND needle.
Three ... The hook could have gotten out of timing. What this means is that the hook is not meeting the needle on the top edge of the eye of the needle. You yourself can check this out by removing the bobbin (or shuttle, cassette). Install the needle flat side to flat side of the mounting rod and all the way up. By slowly turning the handwheel on the right slowly and watching that the eye of the needle is just below the hook on the upward swing of the needle and that they both meet dead center. This when you need to take it in to a repairman. FrankIy I don't like to advise this because of unscruppulous practices. My boss used to call me a virgin Mary because I wouldn't ripp-off the customers. Anyway at this time you can also check the condition of the hook carefully looking for nicks and scratches on or around the tip of the hook. If there is damage present you can file this down with a very fine emory board or by using a strip of 400 to 600 grit sandpaper as if your were buffing a shoe. If the hook is removeable by unsnapping the snaps on either side its easier to buff. Anything courser may contibute to the problem. If the paper won't remove the damage you may need a whole new hook. If its not removeable you will have to take it in to have it installed.They have to time it properly.
Four...The two disk that you mentioned also has a spring. That sping is there to pull up those loops. If the disks are full of lint from the thread going through. the clups of lint won't allow the discs to apply tension on the thread and thereby having tightened the tension so much that that spring is not working properly.You can clean the discs by raising the foot which opens the discs. With a long narrow pick pull out all that lint without scatching the discs. Check closely that the the thread goes across the top of the machine down through the discs pull up snug so the spring engages,through the take up arm,in the two thead guides, then into the needle front to back or right to left, if it is a side loading bobbin. Now the tension will work properly!
TESTING : Move the TENSION dial to mid point of the dial usually 5. This is your starting point.
With two layers of fabric ( not stretchy) and with a regular needle, set stitch length at about 12 per inch on the dial. Now sew about six inches. Raise the fabric and look at the results. Do minor adjustments necessary on your tension dial up 6...7.. if loose on the bottom 4...3..2 if loose on top.
If you did all the steps above those are the steps a repairman performs and charges $75 except me I used to charge $10 .
Brother machines are good quality it is those hidden gremlins that make a fun hobby frustrating when you don't have someone to turn to without having to shell out cash! Its been a pleasure!
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I find that most problems for me have been from poorly wound bobbins or very dense designs. With the dense design, when nearing the end the hoop starts catching/jumping up with the needle, breaking thread. I use software to decrease density one or two increments then embroider. Clean out the bobbin shuttle and the upper thread path. Change needle & make sure your stabilizer is appropriate for the fabric. If too lightweight it tends to shred causing issues.
Is the bobbin winder on? If so, turn it off.
Otherwise, is there power to the machine?
And this happened while you were sewing? Cut the thread above the needle eye. Rock the handwheel back and forth firmly to try to cut the thread jam below the needle plate with the sewing hook. If that doesn't work, open the bobbin case area of the machine and try to pull the bobbin case out, cutting any threads you can see with a seam ripper. Still won't come? Take the needle out of the needle clamp and throw it away (it's bent!), and take the screws out of the needle plate (=throat plate) and take the needle plate off after cutting any threads you can reach under the fabric. Keep cutting and pulling out any thread you find, and eventually, you'll be able to turn the handwheel. Clean all the thread bits, lint, and junk out of the area under the needle plate, the bobbin and bobbin case, and the shuttle area... there will be directions in your manual on how to clean the machine, including the shuttle area. Reassemble. Put in a brand new needle, right way around and fully up in the needle clamp. Rethread from scratch.
Always hold the thread ends behind the presser foot for the first couple of stitches of each seam.
See also: http://www.picturetrail.com/sfx/album/view/22521551
Carmen, seem that you have carried out the necessary rectification, but could it be your rotary hook tip blunt/broken, if not most probably it needs needle/hook timing adjustment. And this will require your sewing machine technician to do it.
try changing the needle rethread the machine top & bobbin make sure to use every thread guide make sure the bobbin is not over wound make sure the bobbin is turned the right way in the bobbin case make sure the bobbin is not warped or damaged if you've done all these things then it's also possible that the machine is out of time & needs to be checked at a repair shop
1. Clean shuttle with your sewing machine brush to remove old broken threads, lint, and sweep out the feed dogs carefully.
2. Rethread making sure you have the handwheel turned toward you, all the way up.
3. Lift presser foot up BEFORE you put thread front to back in eye needle.
4. Set machine on straight stitch sewing. Attach straight stitch foot if necessary.
5. Make sure 5-6 inches of thread are pulled toward you from threaded needle.
6. Pull up bobbin thread.
7. Pull 5-6 inches of bobbin thread and put it, along with needle thread under presser foot.
8. Put fabric scrap under presser presser foot and LOWER it now. Make sure, too, that the needle is correct size for fabric you're sewing.
9. Do a test. You may need to set tension at 4, stitch length at about 4 and width at 6. Just test it and adjust tension in very, very short turns.
Another tip: Put one drop of good quality sewing machine oil on the hook, lower left-hand side. Make sure when you thread bobbin in the bobbin case to hold bobbin between thumb and forefinger and pull out about 4 inches of thread after you make sure thread unwinds top left (if you are right-handed!).
Guide the thread into the slot in edge of bobbin case (screw sits on top of this "edge".
Pull thread under tension spring and then into the delivery eye.
Never panic, my friend! Try this and see if this helps.
You should probably insert new needle too--just in case "old" one bent.
Clean out the bobbin area if there are any thread tangles there.
Refer to the maintenance section of the manual - see the configuration of the bobbin case and shuttle race? The bobbin case as an extending arm and the race a notch. When inserting the bobbin case into the shuttle, turn the handwheel so the needle is at it's highest position. Then lift the lever on the back of the bobbin case and insert the cast into the shuttle, arm pointing straight up toward the bed of the sewing machine.
Now thread the machine with the presser foot up - always - and see if the tangling stops.
When you forget to lift the presser foot before threading the machine, the tension control does not open to capture the thread. Then when you begin to sew, the top thread has no tension, and the bobbin thread, which does have tension, pulls the top thread to the bottom in messy loops.
rethread the machine getting every thread guide
check the thread tension 3 or 4 is usually good
Change needle--make sure the flat side is toward the back of the machine & that it's insert as high as it will go--make sure the needle bar is raised to it's highest position
Clean under needle plate where feed dogs are for lint
Clean bobbin area for lint or loose threads
Rethread machine top thread make sure to get every thread guide
& bobbin that the bobbin is wound correctly & put into the bobbin case or shuttle correctly
here a tip about needle & thread compatability
Cut 6-8 inch piece of thread of the spool you are going to use for your project
Take the needle you are going to use for the project
& insert the thread thru the eye of the needle
& lift one end of the thread to a 45 degree angle
& if the needle is the right size for the thread it will slide down the thread
But if the needle hangs on the thread you need one size larger needle for the thread
Thanks for using FixYa. The upper thread could be tangled. Remove
the thread completely from the machine. The correct size spool cap should be
used for the size of the thread spool. Re-thread the machine according to
the directions in the manual.
Place a spool of thread on a spool pin and check the upper threading.
Remove the bobbin and make sure the bobbin is threaded
properly in the shuttle race. Remove any loose threads or lint in the shuttle
please check that the bobbin is installed in its case rightly. Needle thread is
too tight. Hold the thread lightly to keep the end from going down
into the shuttle.
needle could be thread incorrectly. Thread
the needle eye from the front to the back.
The needle could be bent or improperly inserted and install
a new needle with the flat side of the needle facing the back.
Please do rate the solution and revert for further
Actually,timing of needle vs, shuttle is not very easy job several factor you should check on.There is belt ot sometime a shafting with worm gear and helical gear under machine w/c drive the shuttle with the bobbins in timing order,Any one of them is present on the timing adjustment can be done by releasing the belt or the helical gear,besure machine is unplug then set all mechanism on low dead center meaning the needle move to utmost lower position catching this by the shuttle and bobbins at center position.No motion applied if this was set up,engage the belt with pulley and the bobbins link holder tigh allenscrew besure the needle is lower dead center at the center of shullle bobbins catching needle without motion when setting back at original position.If this was made manually move it on handwheel going up and side down the needle gradually if the needle move freely several time and it was catching this by the shuttle hook bobbins.if ok put thread bobbins and upper thread dial tension with the needle.Move machine on handwheel try to catch the bobbins thread,If this so your machine is ready to sew again if problem occurs on alignment repeat adjustment on perpect alignment,besure all parts on upper casing of machine specially two drive gear are in normal alignment.