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Forum > Sergers, Coverstitch and Blindhemmers > New brother coverstitch -frustration ( Moderated by CarolynGM, Deepika)

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New brother coverstitch -frustration
jennxlynch
jennxlynch
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Date: 5/13/12 11:10 PM

A few weeks ago I got a new Coverstitich machine. Only when I got it, it was broken. Fast forward two weeks and my new, new Brother 2340 arrived Friday. Only I had a weird 24 hour bug/ flu thing Saturday.

I sit down today to figure it out. I can get a beautiful stitch on high quality interlocks. No problem. It's so easy and beautiful I want to cry.

I get a great stitch on stretch denim. I made belt loops for my Colette Beignet skirt, with out the belt loop attachment, I don't have that, I just folded and stitched.

I CAN NOT, no matter how hard I try, get a decent stitch on a more flowy printed jersey. I try loosen the looper and tightening the needles, I try the opposite. I switch to ball point 80/12 instead of the 90/14's that the machine comes with, it make a negligible difference.

I try EVERY setting on the differential feed, TWICE! I make the stitch shorter and longer, I tighten the presser foot. I re-thread the machine so much I can do it in my sleep. I'm using the thread nets. I switched from Maxi-lock in the looper to wooly nylon. I don't know what I haven't done yet and I'm really hoping it's something easy that I just overlooked.

Can anyone tell me what I need to do? Is there a magic combo that I am missing? I really, really, really want to love this machine, but I don't wear interlock clothing, I wear printed jersey, ITY, and swimwear knits. I need this machine to work on those.

Any and all help would be super appreciated.

I will say I'm getting really good at releasing the fabric.

Sew4Fun
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In reply to jennxlynch <<
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Date: 5/13/12 11:20 PM

The good news is I sew with jerseys all the time on this machine and it sews beautifully, so it can be done and for me it's super easy so there must be something you are missing. What this is though I'm struggling with.

Ok, you say you can't get a "decent stitch". Exactly what do you mean? What is wrong with the stitch?

Also exactly what type of jersey are you sewing with? Fibre content, weight, etc.

------
Belinda. Melbourne, Australia
http://sew-4-fun.blogspot.com/

jennxlynch
jennxlynch
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In reply to Sew4Fun <<


Date: 5/13/12 11:26 PM

The looper thread won't lie flat and stitches are skipping, often in huge chunks so there are big pieces of looper thread missing underneath.

I've been using a cotton/poly blend of a medium weight (lighter then interlock but not tissue thin), it's fairly stable (it doesn't curl excessively). I've also tried some modal blends that are a bit lighter in weight and curl a little.

The stitches on the top get shorter too.

Sew4Fun
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Date: 5/13/12 11:46 PM

Mmmm, skipping stitches is very unusual on this machine. The stitches getting shorter sounds odd too. It sounds like the fabric is getting caught on something and not feeding properly. If this happens the machine would skip stitches. I have found in the past if I didn't thread the machine correctly this would happen. It would also explaiin the looper thread not lying flat, which is another indicator the machine isn't threaded correctly. Are you absolutely sure it's threaded correctly? Is the lower looper snapped back in place?

Other things - needles. I'd use #80 ballpoints (standard needle type too, NOT the EL type) which sounds like you are. Double check you have inserted them correctly. In fact I'd take them out, put in brand new needles making sure they are inserted correctly.

Thread - The timing on this machine is set for ordinary sewing thread in the needles (I use Gutermann) and serger thread in the looper. Use thread nets on the needle threads.

Tension - Using the above thread I'd set the looper tension at 4 and the needles at 6.

Differential feed - I'd set this at the first dot higher than 1.

Presser foot pressure - I never change this so leave this as set by the factory.

Stitch length - 3.

My guess though is the machine isn't threaded correctly. If you switch back to the interlock does it sew correctly, without changing anything?

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Belinda. Melbourne, Australia
http://sew-4-fun.blogspot.com/

Sew4Fun
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Date: 5/13/12 11:50 PM

I just thought of something. Are you sure the looper thread is properly in the tension disc? This would explain the symptoms. Make sure when you are threading that the thread is in the tension disc. Even push the lever over a few times, while holding the thead taut. The more I think about it, the more I think it's the looper thread that is the culprit and that it's not threaded properly.

-- Edited on 5/13/12 11:51 PM --

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Belinda. Melbourne, Australia
http://sew-4-fun.blogspot.com/

jennxlynch
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Date: 5/13/12 11:57 PM

Quote: Sew4Fun

My guess though is the machine isn't threaded correctly. If you switch back to the interlock does it sew correctly, without changing anything?

Mostly. The left needle tension seems loose on the bottom, but that's it. That's the part that is totally flummoxing me. I will try switching to regular thread in the needles and serger thread in the looper tomorrow.

I'll pull it all out and re-thread again. It seems like it has a fabric feeding issue, before i switched needles the fabric did get pushed down into the throat plate. But I'm pretty sure that was more an issue of giant needles with delicate fabric.

And once i started stitching without pushing the looper back into place and it didn't make any stitches so I'm pretty sure that isn't it.

I'm sure it's user error somewhere. I just wish I knew where. It reminds me of when I first got my serger and kept turning the handwheel backwards to try and get the needle in the position I wanted it to be in and then I'd gum up the whole works. It took me a while but I finally figured it out.

Thank you for helping me trouble shoot this. I wish my baby wasn't asleep in the same room as the machine so I could try it all again now.
jennxlynch
jennxlynch
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In reply to Sew4Fun <<


Date: 5/13/12 11:59 PM

Quote: Sew4Fun
Even push the lever over a few times, while holding the thead taut. The more I think about it, the more I think it's the looper thread that is the culprit and that it's not threaded properly.


-- Edited on 5/13/12 11:51 PM --

Which lever? The tension release lever at the top? or the piece that pops out in the bottom?

I do sort of "floss" the thread in the tension disc when I pull it through to make sure it's in there.
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Date: 5/14/12 3:42 AM

Quote:
Mostly. The left needle tension seems loose on the bottom, but that's it. That's the part that is totally flummoxing me.

It's strange, this is for sure. I can sew from one fabric to another (interlock to thinner jersey) without issues. I may have to adjust the tensions slightly and change needles but certainly not skipped stitches.

The fact that it will sew on the interlock makes me think you have got it threaded correctly, despite the fact that your symptoms are saying otherwise. Very odd.

The only thing I can think of then is the needles. Needles that are too big or too blunt will cause issues with the way the fabric feeds. All I can suggest is try other needles.

Sorry I can't help more but without seeing the machine in person it is hard. Can you take it back to a dealer to show them what is happening? Annoying I know but this is what I'd do if you can. Hopefully it's something really simple and a dealer will be able to see the issue straight away. If not, maybe a sewing buddy? Good luck.

------
Belinda. Melbourne, Australia
http://sew-4-fun.blogspot.com/

Sew4Fun
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Date: 5/14/12 3:44 AM

I had another thought. Have you tried a narrow coverstitch on the thinner fabric? I do find a narrow coverstitch does work better on thinner fabrics like modal. Maybe it's the wider coverstitch causes issues. Just a thought. I still think a wide coverstitch should still sew.

------
Belinda. Melbourne, Australia
http://sew-4-fun.blogspot.com/

jennxlynch
jennxlynch
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In reply to Sew4Fun <<
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Date: 5/14/12 12:57 PM

HOORAY!!! It works!
I reset everything this morning. I tried the narrow coverstitch and it works beautifully.

As I went to rethread the machine with serger thread in the looper and Gutterman in the needles I think maybe I had missed point #9 in the looper the previous time. I had already un-threaded everything so I'm not sure, but something is nagging me that I missed it previously.

I'm off to practice binding things now. Thank you, thank you, thank you! For all of your help. You made it so much easier to sit down today and figure it out knowing someone out there had my back and was helping me troubleshoot. You rock!

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