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Try re threading the needle. and try a new needle. Make sure th thread and needle are the size required for the material used. Make sure the needle tension is correct for the material. and also that the thread is not old and the same thread in both bobbin and needle.
what you describe is an indication of the needle top thread tension being too loose
make sure that the thread is between the pressure plates of the tensioner and not behind it
next remove the plates around the base at the bit the moves the material through so that you can see when the needle is approaching the bobbin hook
when the needle is at the bottom of the movement, that bobbin hook should be almost at the eye of the needle .
that is called needle position timing
if the hook is not near the eye of the needle or past it then you will have to have the machine serviced and that timing corrected
check the way the need is installed
the cut away bit should be facing the hook and the small groove is where the thread sits so that it does not jam as it goes through the material
In two words, this sounds like a problem with: thread tension. Quite possibly to the point of having an entirely mis-threaded machine, whether because the thread was not routed correctly, or because parts of the thread path are missing.
(Let's review - just for a sec - the basics of how the stitch is formed. The needle, carrying the upper thread in its eye, penetrates the material. When below the material, the needle begins traveling back upward, creating a loop in the thread. (Depending upon the type of machine, either a hook or a shuttle) then pulls this loop so that the lower/ bobbin thread runs then through it. Then, as the needle retracts further upward, an arm (between the tensioning disc/spring and the needle thread path) pulls upward of the thread, tightening the stitch into place.
If, for example, there is no tension at the tensioning disc/spring, that arm will take from the thread spool instead of tightening the stitch into place.
the looping on the bottom usually is a tension problem, the top & bottom tension are unequal usually fixed by adjusting the top tension.
some people that I've talked with have had success with changing to a different size needle ( depends what type of thread is being used).
when the machine is threaded the foot needs to be up ( this releases tension on the thread), when the foot is lowered it the tension is set on the thread. if the material being sewed is too thick it raises the foot too high & releases tension on the thread ( the material has to be really thick to do this).
if there a piece of thread or lint in or around the tensioner or bobbin area it could cause trouble.
other wise if you've tried everything you can think of, take it back th the store & have them try it & tell you what is wrong.
Take a deep breath, count to 10... then slowly let it out. Ok. now. Most industrial machines are basic mechanical machines. Not much to go wrong with them. But they are so basic the manufacturers figure you would almost automatically know how to thread and adjust them.
There are a few things you can check.
I assume you got the needles when you got the machine. Did you know that some machines require left or right twist on the thread? Yes, I know... "Huh?" So first lets make sure your needle and thread match well.
Cut off a length of thread abotu 18 inches long. Take out your needle and thread the eye of the needle. Now hold one end of the thread up... does the needle slowly go down the thread? If it goes fast the eye is too big for the thread. If it slips and stops... the eye is too small for the thread. In either case you need different needles for this thread.
Next, In your instruction book... really study those pictures. Almost all machines require that the bobbin be inserted with the thread unspooling off the bobbin in a certain direction. Insert it wrong and it does strange things with tension and your loop.
Next... make sure you have threaded it correctly. This means lifting the presser foot lever while threading... make sure you are in between those tension discs. (I've had a machine that required that I wrap it 1.5 times around a tension disk... so make sure you are really studying those diagrams.)
Remember. Loops on bottom of material mean top tension is too loose. Loops on top of material means top tension is too tight and perhaps the bobbin tension needs adjusted (loosen top tension first!)
I hope you got the servo motor instead of the clutch motor.
A sewing machine operator can often help themselves when their machine does not operate properly. Here are some simple instructions, which if properly used can save time and mechanics service calls. TROUBLE;UPPER THREAD KEEPS BREAKING; This could be trouble;================Do this; 1.Top tension to tight================loosen tension 1 turn 2.Machine improperly threaded=========check threading 3.Thread twisted on guide post========" 4.Thread twisted out of tension=======" 5.Take up spring bent or broken=======Check action of spring 6.Thread jumped off pull off finger===Check threading 7.Needle bent or burred===============new needle 8.Bad cone of thread==================try another cone TROUBLE;LOWER THREAD KEEPS BREAKING; 1.Bobbin tensionspring to tight=======Loosen tension slightly 2.Bobbin threaded wrong===============check threading 3.Bobbin wound to tight or uneven=====try new bobbin 4.lint or thread on bobbin case=======clean inside case 5.Lint or thread inside hook==========clean inside hook 6.Bobbin case nicked bent or burred===check/change case TROUBLE;MACHINE STARTED SKIPPING STITCHES; 1.Needle bent or burred===============change 2.Needle set in crooked===============Check 3.Thread jumped off take up spring====check threading 4.Thread jumped off pull off finger===check threading TROUBLE STITCHES SHOWING LOOPS; 1.Forming loops on top of cloth=======Tighten bobbin tension ======================================or loosen top tension. 2.forming loops on bottom of cloth====Tighten top tension 3.Bobbin placed in case incorrectly===remove and replace 4.Bobbin thread slipped from under====check threading of tension===============================bobbin case 5.Lint or thread in top tension=======clean between tension discs
If you getting loops on the bottom of your material, you need to
re-thread the top of your machine. I say this because it is very rare
when you will have to adjust the bobbin tension. But if you must,
looking straight down at the bobbin as a clock- at 6:00 is the bobbin
tension adjustment- lefty lucy, righty tighty. Hope this helps.
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
correct There is no standard tension for any machine to be set at. They start
at four when they are brand new, however, after years and years the
springs become compressed. You could start at four and then play around
with it from there. If you are getting loops underneath the material,
you are threading the machine incorrectly.
Sounds as though you've misthreaded the upper tension. The best way to verify this would be to thread your machine, lower the presser foot on to the material. Now try pulling the thread through the needle. (Assuming your upper tension dial is set to a number greater than one). You should feel resistance. Should you not feel resistance, rethread your upper tension.
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