I am sewing vinyl and i'm using a walking foot but the top thread seems to bunch-up on the back side, i've changed the tension but the problem is still present. i'm using a 16 needle and the needle goes throught the layers fine.
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Repairman (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
increase the top thread tension up a bit
it is known as "bird nesting" and indicates that the top thread is not pulling the bobbin thread up tight
needle thread tension is NOT a "set and forget" item as different thread thicknesses , material thickness and needle eye size all have an impact on the tension and it has to be change to suit
Vinyl is a very difficult fabric to sew because it is sticky and tends to grab the thread and hold on to it causing loops in the thread. It would help to use a roller foot or walking foot to help move the vinyl through the machine. Also, try using a very sharp leather needle or top stitch needle. Sew SLOWLY!
Vinyl is difficult to sew because it tends to stick to the presser foot and the sewing machine surface. Try using a teflon-coated, roller foot, or walking foot to help with that. You may also want to try a sewing needle that has a larger scarf that will protect the thread when it penetrates the vinyl. Vinyl will tend to grab the thread and hold onto it when the needle withdraws from the fabric so you will end up with thread loops underneath.
You may want to try a leather needle or topstitch needle.
Ok. Depending on the thickness... garment weight leathers can be sewn with a domestic machine... Most often an even feed foot (the home version of a walking foot) is needed. You will likely need a larger leather needle and somewhat longer stitches than you would normally sew.
As for stitches looking messy on the back that is a top tension problem... you'll need to tighten the tension until that goes away. AFTER you have made sure you have your machine threaded correctly with the presser foot in the up position.
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.
It sounds like you have a tension problem. If you can test using a piece of scrap vinyl to set the tension, that would be the best.
Let me give you instructions for adjusting the tension on anysewing machine. Be sure to have a scrap piece of the fabric you are using andthread the top of the machine with a different color of thread than thebobbin-it'll make it easier to see what's going on.
Thread your machine with the presser foot UP. The disks that control the tension (threadgoes through them) are tightened up if the foot is down.
Change the machine tension with the presser foot DOWN.Because the disks won't be engaged (see above) if the foot is up, the diskswon't move.
Start at the middle setting, 3. Go up to tighten, decrease toloosen. Each machine is different, even 2 different machines of the same model.The best thing to do is start at 3 and use a different color in the top andbobbin thread so you can easily see what changes to the tension do to yourstitches.
Now use a straight stitch a sew 3 or so inches. Take a lookat the top and bottom of the fabric. You don't want to see any (or at least notmuch) of the other color showing from the other side.
Loops on the bottom of the fabric means you need to tighten(increase) your top tension. If you're stitches on the bottom are causingpuckering, then you need to loosen you're top tension. For the most part, youreally don't want to touch your bobbin tension-leave that to a repairtechnician. The factory setting shouldn't be touched except by someone whoreally knows what they're doing.
Keep sewing a few inches at a time until you have the resultsyou want. Now you're tension is where you need it!
Put the tension back up to about 5. Rethread the machine entirely, and make sure you have the pressure foot in the up position when you rethread. If your getting bunching on the bottom, it's probably your top thread that's bunching up. After you rethread, put a small piece of fabric under the pressure foot, lower the pressure foot, and turn the handwheel in the forward direction and watch the thread as it comes around the bobbin case. If it goes around smoothly, try it with the foot control. If it hangs up as it goes around the bobbin case, you might have a burr on the black plastic bobbin case. Take it out, check for any burrs, sand them down, and try again.
Probably a little heavy duty for a domestic machine - most don't like thread through the bobbin tension device any heavier than 50 grade.
Some tension devices have a hole that you can use to bypass the tension spring (Elna is one) which allows thread like perle cotton to be used in the bobbin. But you still can't put it through the needle (just on the underside for decorative sewing effects) .
In the past I've needed to sew vinyl tractor seats where I was stitching the vinyl to a 1/4" thick foam and after trying everything (roller foot, leather needle) on the domestic machine, I bought a Singer 20U industrial machine with 1 1/2 hp motor in a table in order to seam this weight of textile. Different system needle used and the bobbin could handle heavier weight thread.
when sewing thick fabrics and when using thick threads you will usually need to tighten top tension - on most machines to maximum in order for the machine to pull the thread up into the fabric. you must also use a needle which will slide along the thread when thread is through eye of needle (take needle out of machine, put thread through eye and see if needle will pass freely along thread - if not, use a larger needle)