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Hello I just got a new home My Lock 334D machine. It has Seized intermittenly. could we troubleshoot the problem & fix it together?

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Un-thread and then see if the machine will run without thread.

If not, it needs to go into the shop for repair.

If it does, refer to the manual. Or, the guide that should be printed on the inside of the serger's door.

Raise the thread antenna to it's highest position. Keep it at this position when serging. If lowered for storage, and threaded, be sure the thread does not tangle around the antenna arms.

Raise the presser foot.

Open/set the tensions to zero.

Raise the loopers to their highest level - there may be an indicator mark on the side of the serger to match with a mark on the handwheel to help with this.

Start threading from the right to the left; upper looper first.

After threading, reset the tensions to a medium number, lower the presser foot and stitch a chain to test the stitching.

Serge a scrap and adjust the tension as necessary.

Once you get the serger working as it should - don't run out of thread. Tie off, open the tension, raise presser foot and gently guide the new thread through the threading process.

When changing the thread or removing the thread to store the serger, cut the thread at the antenna, leaving thread tails for tying off the new thread.

If you do not have Nancy Zieman's "Serge with Confidence", you will find it much more informative than the average serger manual.

Posted on May 02, 2010

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Thin, light-weight fabrics present some issues with sergers, ie the fabric tunnels with the stitching. Usually, it is better to use a narrow seam. Also, a stabilizer (wash-away) or even adding a strip of thin paper (toilet tissue, adding machine tape, etc) to the seam will help the fabric hold its shape when stitching. I have also sprayed & ironed heavy starch on thin fabrics to help stabilize.

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Here are some tips for a jammed presser foot:
A bit of lint-thread fluff in one or more places a home sewer can't reach to see much less safely clean. This is a job for a professional the first time so they can show you how to clean the inside of the machine without getting a very nasty electrical shock, and how to get the machine apart, cleaned, and back together with sewing functionality intact. (TIP: don't - don't - don't use 'canned air'! It will only push any lint/fluff deeper into the machine)
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OR: a broken gear inside the machine (usually the bobbin gear but sometimes a different gear, and sometimes it's two broken at the same time).
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so nothing is moving at all either by pressing the pedal or turning the hand wheel? Can you hear the engine humming or is the light working okay?

If yes, then this could be a gear failure inside the machine and not something easily fixed. Is this a oldish machine that has either had a lot of work or been sitting for a while? Has it been serviced at all in the past?

My Bernina 334D failed and it was a nylon gear in the main drive area which I had replaced but the dealer wasn't keen to do it, they wanted to sell me a new one. However, I checked with Bernina themselves that the part was available and how much, then talked to a local repair guy and he did the job for me. About 1/3 the cost of a new one though.

I'd suggest you take it to a Singer dealer and ask for a quote and find out if this is what has happened to your machine.

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http://content.janome.com/index.cfm/Machines/Sergers/MyLock_634D

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