Yikes, darlin! Machines aren't like people in that they can just develope an allergic reaction to something even though they have been eating it for 20 years! All I can suggest is take some of your projects done in the thread you have and say HERE, it worked, now make it work again! Call your customer service people, too at the manufacturer. Tell them what is going on.

Buy a spool of their thread and try it and then see what results you get.

My dealer will tell you also that thread is causing most of the problems.

Are you using the pre-wound bobbins and are they the same ones they are using when they test the machine?

Once I was having that same problem and I didn't have the correct bobbin in the machine.

I would go back with my machine and sit there in the shop with their(?) thread and start it doing a simple design...maybe then they will get the picture. Good luck I hope that it's fixed soon.

It really sounds like a tension problem...Stay at the shop til it works the way you want/expect it to!! Call the Manufactures rep IF you don't get results...keep calling til YOU are Happy again!!!

What machine & model? Our machines have become so computerized that SOME of the repairmen have trouble working on them!! If they can not solve your problem, ask it be sent to the manufacturer...yes, it will cost you a packing charge, probably, but at least you'll have a machine that will work! I agree with stork..go to the shop & have them stitch out a design with YOUR thread & bobbin. One of YOUR designs that is messing up. But stay there. Can't take all that long to stitch out a design and for them to see it DOES have a problem.

I found when i took my machine for its first service the guy told me he had adjusted the tension to the bobbin thread i use and as my machine came with a spare bobbin case that is adjustable should i change the bobbin thread.When my machine brought the bobbin thread up i was told to go through these things
1) check the bobbin is not unravelling the wrong way and flip it over then rethread the machine
2)it may be caused by hooping or float another peice of stabilizer underneath
3) try using the same thread top and bottom even if you wind white embroidery thread and use in the bobbin or rewind a new bobbin.
4)Clean under the bobbin as the case collects furries and lifts the bobbin case up
5) change to a new needle
I did all of this and mine sorted itself out but mine didnt just come back from a service as yours did i hope that i have been of some help to you if not take it back with new needle in situ and newly wound bobbin thread and ask them to test it infront of you i would
Good luck and you have a right to rant i would lol *4U

try changing just the bobbin thread. With my Janome it is really fussy about bobbin thread. Not so fussy with the embroidery thread.

Stacey, good luck dear one - I can't add anything here - that hasn't been said - but I can give you a *

Anytime I have taken my machine n I take the project that it messed with me. I also take the threads(several spools. I then get him to set machine up & tell him "Let me show u what it is doing" using my thread. He sees I watch as he takes it apart & get him to show me what he is doing. I've got where I'm brave enough to take mine apart & clean & fix a few thingsbut wouldn't advise it unless the repairman has shown u how. Mine had to go back to factory last yr. close to christmas & I've had no problems since. It will sew with just about any of the threads. It doesn't like sulky threads but I've learned how to get around that, it's all in how the thread comes off the spool. Good luck I certainly know how frustrating it can b. *4U

I feel for you! I know how frustrating that can be. I had to dispose of about 60 spools of thread that my machine just did not like. It ticked me off to "throw away" the money that thread cost me. But it was a much better option than being frustrated to tears every time I embroidered.

Any chance of seeing a different technician. I confess last time I took my Janome in to be serviced it came back doing the same thing, so even though it cost me more I took it across to the guy who used to all the Janome work and got him to check the tension and it works fine now.
I can't see how the problem is the thread if it worked OK BEFORE they serviced it. It has to be a setting they have changed. At least to my logical way of thinking.

Hi, I had similar problems until I realised that my machine won't work with anything other than Isacord - I'm in the U.K.- and I also use a specialised bobbin thread. The top thread is on a separate thread stand allowing it come off vertically, not horizontal but I was still getting problems until I realised there was a small amount of thread caught between the tension discs. The machine had to be taken apart to remove it, also the bobbin area was very clogged with fluff. I now use a size 14 (90) needle, blow out the bobbin area every time I finish an article and put in one layer of stabilizer for every 10,000 sts. Advised I've picked up from the lovely, helpful ladies on this site. Good Luck, there's nothing worse than a machine that won't work!
Yo

What is so different about the brand of thread you're using that they would have to 'recalibrate' the machine to use it? That just doesn't sound right. White thread is showing because the tension on top is too tight, or bobbin too loose or some combination of both. Something happened to make it do this, so when you go to the dealer, take your bobbins, your thread, your needles, etc. Make the machine do the 'bad' thing right in front of them, and then start changing things ***one at a time*** until it gets good. Don't change more than one thing, because then you won't know which was the cause. I.e., sewing bad design, don't change any settings, just put a different spool of thread on top, see if it changes AT ALL. Then put your thread back on top, change to their bobbin, see if it changes. It may end up being a combination of things, but if you test each thing individually, you might see how each contributes to the problem. Hope I'm explaining it right. As Jerrilyn said, machines don't just develop allergies to thread, **something** changed! Good luck and hugs, Marji

Superfrog, I had the same thing happen to me. Boy was it frustrating. But, it turned out to be the spool of thread I was using. Had used this spool of thread before but, for some reason this spool decided not to work anymore. I almost felt like it had something on the thread. (still do not know why) But when I changed to another color everything worked well, I put that spool back on and it did the "bad" thing again. I noticed when that spool was used you could gently pull on the thread and it would not pull smoothly through the needle. It is still a mystery. Good luck I know that can really drive you "crazy". Sue

these things can make you very angry when they does not work, but very happy when the result is good.hope yours work good very soon again

Almost everything has been said. I think all of the adjusting has your tensions messed up. One more thing to check when this problem appears suddenly. Check the thread spool and path to see if the thread is hanging up on something. A tiny bit of plastic flashing or a small burr can cause the thread to feed wrong. I use RA thread and some of the spools have a snap ring on the bottom to hold the end of the thread when not in use. If I forget to close it the thread will wrap in it and pull. Also, use an emory board to file down the bits of plastic flashing so the thread doesn't catch on them.

In reference to working with the spools, but not cones of thread. Sit that cone on the table in front of the machine, run it up & through something if you have it (like that thread takeup thingy, or I have run it thru the latch hole in the lid that comes down over the thread area, leaving the lid up, of course!) and the thread seems to work off the cone that way. Worth a try. But I really think the repairman has messed the whole tension thing up! Hang in there!!

I'm bringing this ttt because I'm curious if you found the problem with your machine.

You mentioned it works with thread spools but not thread cones. Sounds like it could be how it is spooling off the cone? I've put a link where I answered someone with something I did which fixed my problems.

Hoping you have already figured it out anyway.