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Knots! hi there, i had a repair question about my janome rx18s. the top stitch comes out fine, but the stitching on the bottom of the fabric is coming up entirely knotted. i've tried changing the way the bobbin was loaded, using different types of threads and rethreading the bobbin. not sure what else to try! thanks for any help you can offer.
Try changing the needle sometimes over use causes burrs on the end of a needle and always remember to use proper needles to appropriate fabrics. Change needles frequently to avoid unnecessary wear on the feed dog teeth
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Question edited for clarity.
Please don't type in all CAPS, it is considered SHOUTING and is harder to read.
Sewing machine tension is a delicate tug of war between the bottom Bobbin tension and the Upper tension to put the loop between the 2 layers of fabric. You set the Bobbin tension first and the the top tension depends on the fabric and the thread used.
Your Bobbin tension is very very loose to be not tensioning at all or the top tension is too loose.
If it doesnt bring bottom thread to top then the hook is not catching the top thread. I assume your able to bring bottom thread to top?
Bring bottom thread to top, place sample fabric under pesser foot, lower foot, then hold both top and bottom threads in left hand and manually turn handwheel with right hand and see if will stitch.
Dropped stitch(s) implies the top thread is not being wrapped around the bobbin. The rotary hook must catch the top thread as the needle rises, pull additional thread into and around the bobbin and release the top thread. Then the takeup arm pulls the extra top thread from underneath the bobbin and sets the stitch to the selected tension.
If with no fabric it brings bottom thread to top then it's not likely a timing issue but rather an interference or tension problem. Test top thread tension... foot up is no tension, foot down is selected tension and should be noticeable by simply pulling on the top thread and note the difference between foot up vs foot down.
Be sure stitch is in between the two fabrics when straight stitch. Adjust tension until stitch is between top and bottom fabric. Use different color top thread to make it easier to see. Once tension is correct sewing straight, switch to zigzag.
Remove hook race and bobbin. Clean area with vacuum. Replace needle. Try different thread and fabric.
Sounds like a threading issue. Be sure to install a brand new needle (every 8-16 hours!). Remove the top thread completely from the machine. ALWAYS RAISE the presser foot and rethread from the beginning. You may need to tweak the top tension until the two threads meet in the middle of the fabric.
This should take care of your problem. If not, you may have the technician look at it again.
Remember, thread problems under the fabric are usually top thread issues. Thread problems appearing on top of the fabric are usually a bobbin thread issue (or top thread tension being too loose).
You shorten the stitch length and either reverse a few (5 or 6) stitches or stitch forward a few stitches. Some people will stitch in place but that frequently causes a knot on the underside of the fabric. You can also tie the thread tails together (especially when sewing fine fabric like chiffon, silk, etc.) and clip the tails close to the knot.
on the front of the machine there is a lever/knob that sets the stitch size
if it is in the middle position ,the teeth will just go up and down and not back and forward
check that setting
it is used to seal of the threads when starting to sew and when finishing
start the sew for about 1/2" then reverse the feed then go forward again to complete the sewing
at the end of the sew do the same thing again before cutting the threads
this locks the threads as a knot so that the seam will not come undone
Several things to try:
Pull thread tails (both bobbin thread and upper thread) straight back and when you lower the presser foot, make sure they are held down straight back. This may or may not be enough to solve the problem, but it is simple to try, and often works. You might want to hold the thread tails while you start sewing.
Use a starter--folded piece of fabric scrap about an inch long--and begin sewing oink middle of starter. Push the fabric you want to see right up to the starter and keep sewing from the starter right onto your project without lifting the presser foot or cutting the thread. When you finish sewing, cut the little piece of thread between the starter and your project.
Before lowering presser foot, use wheel to lower your needle once and then pull up bobbin thread to top surface of your project. Then hold both bobbin and upper thread tails, lower your presser foot, and begin sewing. Release the thread tails after a few stitches.
Hope this helps. Those nasty "thread nests" are a real pain.
hi! there,
set dial tension to #3 and stitch tension to #12 try on straight
sewing,check bobbins winder if thread was wind on clockwise rotation before sewing.if ok try to sew and observed the change.
have a nice day regards,dont forget to rate me
thank's
If it was sewing correctly BEFORE the needle break...why did the needle break in the first place?...and what fixes did you make?
If it sewed properly...what changed?
Cut your upper thread close to the spool...make sure the presser foot is raised and pull the cut off thread section through/out of the machine from the needle area (sewing direction...do not pull the thread backwards!)
Clean out the bobbin area...remove any traces of lint or pieces of thread...look for any broken off needle pieces... brush the bobbin area out....then add a drop of sewing machine oil (but only if your manual says to oil that area).
Remove the needle plate to expose the feed dogs...brush/clean out that area too and add a drop of sewing machine oil...then secure the needle plate back on.
Replace the needle...do it again...yup...some needles arrive bad from the factory. Make sure the needle is inserted and positioned properly. Then thread the machine WITH the presser foot in raised position. (The thread needs to get seated into the upper tensions.)
..with the.presser foot down...thread the new needle.
Oh...and use the correct needle for the thread. (a universal 80/12 is standard).
Thread can cause issues too. Try a different bobbin, or maybe a different spool of thread to see if that makes a difference.
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