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Topic: wavy stitches  (Read 636 times)
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msalowishus
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« on: November 27, 2008 05:42:39 PM »

hello. i have been having a problem lately with my straight stitch coming out wavy looking. its only on one side and not constant. i have changed fabrics and rethreaded. i'm not sure if its a problem with the machine, or thread, or the way i'm doing something. here is a scan of what it looks like. i couldn't get a picture because my camera kept focusing on the pattern instead of the stitches. any ideas?



also, is this problem going to result in low quality stitches? in other words, do i need to redo that hem or do you think it will be ok? thanks for any help!
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Sew-Classic
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« Reply #1 on: November 27, 2008 07:12:38 PM »

The first thing to determine is if the sew straight or if the fabric is pulling the stitches wonky.

Take all of the thread out of the machine. Put a piece of paper under the presser foot, set you stitch length to zero and "sew". Does the needle keep going do in the same hole? It should.

What is the fabric type? Needle type? Needle size?  thread type? Stitch length?  It also looks like that is being sewn on the bias .  If your presser foot pressure is too high, it can stretch out your fabric and give a slight "loopiness" to the stitches. 

I can't tell 100% from the photo what is going on, but I did write an article about why straight stitches aren't always straight.  Perhaps there will be some information in there that will help you with your problem.

Here it is:
Slanted Stitches? Why the Stitches Aren't Straight & What to do About It.

 
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Jenny
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msalowishus
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« Reply #2 on: November 27, 2008 07:19:09 PM »

the fabric is just cotton fabric. that particular piece is on the bias but thats not the only time that its happened. its a normal needle size, 14 maybe? polyester/cotton thread, and my stitch length is on 3 out of 5.

when sewing only one layer of fabric i noticed the tension is off so i tried to fix that. the waviness is not as bad at the moment but it is almost as if the tension is too loose on the top and bottom and thats why its wavy. is that even possible?

looking at your article, what is happening right now seems to be what is illustrated by your drawing. but what i have shown in the above picture is different. the thread actually is loose between the stitch coils. and that is what causes it to look wavy i think. is that a tension problem?
« Last Edit: November 27, 2008 07:23:36 PM by msalowishus » THIS ROCKS   Logged

Ambimom
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« Reply #3 on: November 28, 2008 06:15:22 AM »

I think it's the tension that needs adjusting.
www.ca.uky.edu/HES/fcs/FACTSHTS/CT-MMB-213.pdf

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Sew-Classic
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« Reply #4 on: November 28, 2008 11:07:56 AM »

the thread actually is loose between the stitch coils. and that is what causes it to look wavy i think. is that a tension problem?

If the thread is loose, then it's likely either a tension issue or a worn out needle.  There is also a slight chance there could be an issue with the take up spring in the tension assembly.  If the problem goes away with a bit more upper tension and a new needle, then you're good to go.

Happy Day!

 
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Jenny
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SkitzoLeezra
« Reply #5 on: November 28, 2008 12:30:15 PM »

First, if you cannot see the wavy stitch from 3 feet away, don't re-do it.  And stop looking at it so closely. Smiley
Next, I have that same problem on my machine on occasion and here is what I do.  Remove the bobbin holder.  Look for a super small screw on the side.  Tighten it about 1/2 a turn of the screwdriver.  Try your straight stitch and see if it looks better.  If not, try another 1/4 turn of the screw.  You do not want to overtighten.  Caveat:  Your manual will tell you not to attempt this adjustment on your own but as long as you don't get too aggressive with it, you will probably fix it.  Good luck!
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