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Forum > Sergers, Coverstitch and Blindhemmers > Juki MO103n needle keeps breaking! ( Moderated by CarolynGM, Deepika)

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Juki MO103n needle keeps breaking!
sandyme
sandyme  Friend of PR
Intermediate
Maine USA
Member since 5/30/07
Posts: 3
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Date: 9/6/12 1:08 PM

I bought this workhorse second hand about 8 years ago and have never had a problem with it. In fact, I'm embarrassed to tell you I used the same needle for all that time! Last week, I sewed over a thick cotton seam in a skirt and broke the needle. Since then, every time I try to sew with it, I break a new needle. I have made sure the needle is inserted properly and all the way in, but it doesn't seem to be making any difference. Today, I tried again, got the new needle in and threaded, tried it out on a small piece of fleece and had no problem. Tried it again on the fleece and still no problem...started to sew on the knit dress I'm making and boom...broke another needle! I'm at my wit's end. Any ideas?

beauturbo
beauturbo
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California USA
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In reply to sandyme <<


Date: 9/7/12 1:31 AM

8 years on a needle, is a long time! Maybe there is something different in the needle type and size, you got in it now than before? I think it might be so old it might take round shanked DB X1 needles possibly, and not regular flat shanked sewing machine kind of needle at all? But i don't know for sure. Could that maybe be it? Try opening the front of it, and look someplace/every where on it, for even what kind/class of needles it is even supposed to take.

Screaming Mimi
Screaming Mimi
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California USA
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Date: 9/7/12 2:35 PM

Sewing machine needles are slightly longer that serger needles...perhaps you have a sewing machine needle in the serger?

Betakin
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Betakin
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Arizona USA
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In reply to sandyme <<


Date: 9/8/12 5:41 AM

I was also thinking the needle had slipped down and was not all the way up into the shaft or the wrong needle is being used but you said you did make sure that the needle was inserted as high as it would go.
When you insert a new needle are you remembering to have all threads free and clear from under the needle area and no woven looper threads underneath?
Also, remember when or if you need to to re-thread a looper that before resuming serging that you need to rethread the needle again after threading the looper and having all threads free and clear and pulled to the back? Maybe check too that you don't have a bent looper.
Needle lengths vary and some needles are designed with a different scarf and using the wrong needle can damage a looper. Sometimes too, even the right needle used can turn a bit and cause problems. I hope you can figure out what is causing this problem.

Changma
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Changma  Friend of PR
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New York USA
Member since 2/20/12
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Date: 9/8/12 6:57 AM

Maybe a tiny piece of the needle got lodged somewhere when it broke. Try vacuuming with a small vacuum attachment-this worked for me on my sewing machine, so it's worth a try.

rag doll
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rag doll  Friend of PR
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Australia
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In reply to sandyme <<


Date: 9/9/12 9:19 AM

Hello

Your Juki 103 takes a round shank needle which is a BLx1. A regular flat back needle doesn't't fit this model.

Often if you sew over something thick and it can cause the needle to hit the looper arm and send the machine out of timing. In turn you will break needles when you sew.

I would make sure you have the right needle in the machine and make sure that it's inserted to the highest point. Before sewing turn the hand wheel over manually. Listen to see if you can hear the needle scraping on anything. Sometimes you can hear a pinging noise. If you do it usually means that the needle is hitting on something and as soon as you sew the needle will break.

Let s hope that it's just your needle. If not I'm afraid it will be a trip to the technician.

HTH

sue

------
Brother QC1000, Brother PQ1500, Bernina Virtuosa 160, Pfaff (old), Babylock BLCS, Bernette 1100D, Bernette 334DS

Betakin
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Betakin
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In reply to sandyme <<


Date: 9/9/12 11:52 PM

My old BL serger took round shank DCx1F needles and it was a bit difficult to make sure they were inserted properly as to which was the front and the back of the needle. If you are using round shank needle then see if there is a line going down the front of the needle. This line helps to determine the front of the needle and to insert it properly. For me the line was a bit difficult to see.
Also round shank needles vary and you need to use the proper one. If your serger takes a BL needle I think their are several in that type also. For instance, my serger took the DCx1F but my serger could not use the DCx1 and had to be the DCx1F.
There are also different BL neeldles like BL1 and BLX2N etc. so do be sure you have the right needles.

sandyme
sandyme  Friend of PR
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Maine USA
Member since 5/30/07
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Date: 9/13/12 4:16 PM

Thank you everyone for all your suggestions. I am using BLx1 needles--the ones called for in the very skimpy instruction booklet I got for the Juki. I made sure it's all the way in and that the fine line is in the front and the concave area is in the back. Also, it's all the way in. I've spent some more time trying to fix this and discovered that the needle is indeed making a ping sound when it goes down into the base. With a great deal of finagling...magnifying glass, flashlight...I found that the needle is hitting a piece of metal in the bottom. It's not the looper, but a stationary piece that is screwed underneath. There are two metal parts here that open up into the actual sewing bed. It's hitting the one closest to the front of the machine. So, I guess I need to find a serger mechanic?

Harriet P.
Harriet P.
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Tennessee USA
Member since 6/30/05
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Date: 9/13/12 5:20 PM

HI, This piece of metal you are discribing may be the stationary blade of the serger. Maybe the blade has shifted a little and needs to be realigned.
Harriet

sandyme
sandyme  Friend of PR
Intermediate
Maine USA
Member since 5/30/07
Posts: 3
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Date: 9/20/12 3:13 PM

Thank you! Harriet, you were correct. The screw had loosened on the stationary cutter and that's what the needle kept hitting. It's fixed! And I am a happy sewer again.

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