Question about Juki DDL-8700

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The bobbin thread is too loose and bundles up when I go to more than 3 layers . I need to sometimes go through a thick plastic vinyl window material, which with some seams will make 4 or 5 layers through canvas.

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--Some times you may have to use a neelde with a larger eye so that the thread will flow though the needle easier,
-Sometimes the clearance on the bobbin case stop has to be adjusted to allow for thicker thread,
-Be abundantly sure the top thread is through the discs on the top tension and not behind the tension devise, then increase the tension to a tighter position. if there are numbers on the tension, og to 5-8 so tyhat the thread will pull up into the fabric and not form loops under the fabric
-What type of thread are you using, possibly try a thinner thread
-check the bobbin as it spins in the bobbin case and after you have put the thread under the tension spring on the bobbin case, be sure the thread will pull out of the bobbin case relatively easily if not loosen the screw on the bobbin case ( righty-tighty/ lefty-loosey)
if all this fails you had better take it to an industrial sewing machine technician

Posted on May 02, 2010

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2 Answers

Why can i see bobbin threads coming through top layer


needle thread tension is too tight
loosen of until the both threads meet at the center of the materials

Jan 31, 2016 | Sewing Machines

2 Answers

The bottom thread is real loopy. I have adjusted the top tension and it helps a bit but still to loose


Remove all the thread from your machine. Install a brand new needle. Raise the presser foot and re-thread the upper thread, making sure you are following the correct threading sequence. Confirm that the bobbin thread is threaded through the bobbincase properly. Now, perform another test stitch. Is the bobbin thread still looping?

If you have already tightened the upper thread tension and the bobbin tension is still too loose, then you may need to tighten the bobbin tension. First, mark with a permanent marker where the slash of the screw head meets the bobbin case. This will mark where the screw was originally set before you begin making adjustments and allows you to return the screw to that position should you need to.

Set the upper tension to the halfway point between the high & low number. This is what would normally be the standard.

Then gently turn the bobbin tension screw to the right 1/8th of a turn at a time. Then test. Keep adjusting until the bobbin thread tension is correct. The tensions are correct when the upper thread and the bobbin thread meet in the middle of the fabric.

...

Nov 15, 2015 | Sewing Machines

3 Answers

Fy5318 breaking thread on multiple layers of material, how to adjust?


either the thread is old, or the tension is to tight.
or there is a bind some where in the line layout.
you mite goto there website and look under FAQ section for other help
or
www.youtube.com/sewing/canvas/material/
www.youtube.com/fy5318/multiple/layers/of/material/setup/

www.ask.com/sewing/multiple/layers/of/material/and/setups/

Sep 17, 2015 | Yamata Fy5318 Mechanical Sewing Machine

1 Answer

Upper line tension too loose


Tangling on the bottom of the cloth is always caused by one of these:

Upper thread is not threaded correctly.
Upper thread tension is too loose.
Using too thick thread.

Sometimes caused by:
Damaged plastic bobbin case

Rarely caused by:
Shuttle out of time
Burr on the shuttle

It is NEVER caused by the bobbin tension, so don't touch it.

Mar 22, 2014 | White Sewing W3300 Computerized Sewing...

1 Answer

I am sewing outdoor fabric and using the strong thread and having problems with the bottom thread (bobbin), it is loose and sewing right. I have tried tightening the tension on the bobbin. It was sewing...


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.

Probably not the response you wanted though.


May 02, 2011 | Baby Lock Imagine

1 Answer

Using jeans thread, bobbins thread pulls out immediately, tension is incorrect


Sometimes you need to go for a lesser tension as soon as you move up in thread thickness. A jeans thread is often nylon and already has tension in the way it's wrapped. Try using a low tension and a straight line seam (don't use a zigzag pattern or wave).

Also, try practicing on a piece of scrap material first- make sure it is the same thickness/consistency as the jean material you want to work on. Do a few forward and then backward lines; this will make sure the problem isn't in the initial wind of the bobbin itself, and this usually gets the extra slack out of the bobbin.

Mar 13, 2011 | Singer 1507

1 Answer

The bobbin and needle won't move when i press the foot pedal, do i have something threaded wrong?


I own a signer simple and it is a great little machine but if not adjusted just so it will act up like this.

The three things that caused this were:

#1 tension on upper thread and bobbin casing were uneven.
#2 Thread was catching on bobbin casing (solution, generously oil the face of the casing where the latch to remove the bobbin is located.
#3 The material was too thick (denim, leather) or I was sewing through too many layers of fabric.

As a general rule of thumb with this machine I never sew through more than 4 or 5 layers. This is a great machine for quick fixes and mending, but if using for apparel and complex items it can be a bit finicky. I default to a sturdier machine in these instances.

Jul 18, 2010 | Singer 3116 Simple

1 Answer

I was sewing some thick material and now I get 3 sets of 3 beeps, now when you press the foot pedal nothing happens


You probably need to clean out the bobbin case area and then check your needle to see if it's bent. I know when I sew very thick fabric or many layers... it sometimes bends the needle. Also make sure you're putting the presser foot down when you sew. Then see what happens. Let me know if any of this works or if you've already resolved your problem.

Sep 11, 2009 | Singer 2638 Mechanical Sewing Machine

2 Answers

Can the consew 339rb-1 be used only with 1 needle?


this is the specifications for the 339rb-3. they sould be close to yours, if you can put two seperate needles in and the machine hase one hook and bobbin case then I would say you can use one needle, if you have two hooks and bobbins, I would say no, you may want to thread with one and just hand turn for a few stiches to sew hoe it reacts, leave the bobbin door open so you can watch the hook.




Specifications


  • Two needle mechanism readily makes two parallel lines of stitches
  • Compound feed, walking foot mechanism insures even feeding of material
  • Large hooks and bobbins assures longer operation between bobbin changes
  • Centra-Lube® semi-automatic lubrication system
  • Automatic hook lubrication
  • Oil fed take-up
  • Simple adjustment permits raising and lowering of the center foot which allows for sewing different thickness of material
  • Safety clutch protects the hooks from being damaged
  • Various needle gauges available
  • For sewing light to heavy-weight materials such as leather, vinyl, upholstery, synthetics, canvas, vinyl and various coated and laminated products
  • Designed for stitching such products as auto, boat and furniture upholstery, tarpaulins, covers, sails, tents, camping trailer covers, awnings, umbrellas, tops, bags, luggage, handbags, travel ware accessories, sports and camping equipment, wearing apparel, outdoor clothing, canvas shoes, slippers, orthopedic appliances, etc.
  • Suitable for double needle seaming, binding, taping and piping operations

Aug 27, 2009 | Consew 339RB-3 Sewing Machine

1 Answer

Tension


I answered this a couple days ago but don't know if it went through. I can sew through 6 or more layers of denim with my 226, no problems at all. In my 30 years in the upholstery business I never had a problem sewing leather, vinyl, canvas or multi-layers of fabric. The 226 Consew, the 111W and 211w Singers I had presented zero problems with heavy fabrics - and I don't consider vinyl "heavy".

You need to first of all check threading. If the machine's threaded wrong you're break thread. Also you need to oil under the bobbin case and the bobbin hook and the rest of the parts as well.
Then, loosen thread tension on top by turning the knurled knob that's on the spring that's holding the tension discs. Also loosen bottom tension on the bobbin case by turning the small, left-most screw on the outside of the bobbin case counter-clockwise. Do both with the presser foot down. Pull the thread(s) out and feel the tension. You should be able to pull the threads out with some little effort. Tighten both a little at a time until you get some tension. Run a couple seams and check where the threads meet in the fabric. They should meet in the center. Also check stitch length. If you're using 92 thread (is should be left twist), you should run the machine at about 6 - 7 stitches/inch. I'm running my machine at 5 - 5 1/2 with #69 nylon bonded, and 6 - 6 1/2 with #11 mono.
One more thing; if tension's too loose at the bobbin or top, the machine will jam in the bobbin and thread will break.
Go to www.consew.com and download a pdf owner's manual for free. You need to click on the 224. That machine, the 225 and 226 are the same.

Nov 05, 2008 | Consew 226R-1

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