My babylock 5260 will sew correctly for an inch or two, then it stops looping. I think the tension is set ok now because when it does sew, it looks like it should. Randomly a needle gets unthreaded while sewing. It has been each of them unthreaded at seemingly random times so I can't say it is related to one in particular.

SOURCE: Babylock Eclipse SX won't catch the overlock stitch

• the factory default settings are 4,4,4,4 and M
• Change the needles
• use a can of air spray ( compressed air can sold in computer stores) to ensure there is no fabric or dust under the needle plate

SewTechWayne

• 186 Answers
• Posted on Jan 31, 2009

SOURCE: thread tension on Babylock Esante2

Try a wing needle, it will keep the vinyl from pinching the thread. Don't be afraid to crank up the upper tension all the way if you are using heavy thread.
Hope this helps.

SOURCE: Singer Touch & Sew won't loop bobbin thread

I believe you have a broken gear. These are difficult to repair on your own.

SOURCE: Babylock Ellure thread issues

I have the same machine and love it. Sometimes if the thread is old that will happen to me.  And also I spray the thread with static guard before i thread the machine in dry cold weather.  Since you said you are an embroiderer I assume you are using the same weight thread top and bottom. The other thing that causes that on my machine is if there is a nick on the spool of thread I am using and the thread catches just a little as it comes off the spool.  I use a fine nail file and smooth off the edge where the little v is to reattach the thread when you are finish using it.  I never use them. You do sew a little and cut off the tail off the top thread before you let it go through the rest of design. I hope you have found the solution but I learned these tricks while having the same problem as you.

SOURCE: Thread loops

Proper set of bobbins and tension set up vs. fabrics will sew you satified.Also incude regular maintenance cleaning of the feeds dogs with a brus,also the shuttle assembly need sometime to clean.Some threads and fabrics chips accumulates in the feed dogs and shuttles assembly.In setting up thread bobbins the thread should be clockwise direction as you pull out on slot coming out to the bobbins (as you shown in my inserted image manual).The loop thread should be propely in the sequence position same like in the image refer to it.If you use cotton/ polyester fabric in the begining of trial set tension dial to No.3 and stich to No. 8 to 12 any convenient to you Use needle No. 14 .Posible make a record if you are sewing different types of fabric mostly silk fabric is hard to sew adjusting to lower stich can posible sew satisfactory.