8 hours only.

The first thing I do, when I have any problem with any sewing (embroidery or just sewing) is change the needle, and make sure it is inserted correctly. Sometimes you can feel a burr on the end of a needle, then it is way past needing changed. opaoma is right a needles only has about an 8 hour life. I try to change the needle if I am changing the type of fabric or stablizer I am using.

Change needle every 8 hours is what my machine manual suggests. I have a singer 250 CE.

You also sometimes get a bad section of thread. I have pulled my hair out rethreading and then found the machine is happy again. Happy machine, happy me.

also the darker the thread the more it has been dyed and it becomes weaker. learned this while learning long arm quilting

Thanks for asking this question. I knew to change the needle when things don't seem to go smoothly but I had never heard about the 8 hour. Good thing to know.

My machine does this also.
I turn the speed down to the lowest setting (350 stpm) and it is fine.
I do push my needles to get the most out of them. I now have my machine set for the lowest speed so my 2nd option is change the needle.
If I still have a problem I change the brand of thread. I hope I helped.

Claude if my thread starts breaking the first thing I do is change the needle. I have started using Universal needles on the advice of my dealer/repairman( except for specialities like metallic & leather) . I am getting longer use out of the universal needles . *

You can also Silicone in a spraycan, and just spray it lightly with that. The silicone makes the thread stronger.
I have a industrial overlocker (serger) and the one needle thread runs over a pad with silcone it absorbs from a little container, and it works.

same thing for me yesterday, but just after change the needle (new !).... I think i will try to change her again :o)

I have had that problem also and as with everyone else,after repeated breakage and changing the needle-sometimes it still breaks. I found that some of my thread is the culprit-older thread breaks easily. After switching to a newer thread spool or cone-no more breakage.I actually use alot of different kinds.I have alot of cones that I bought off a friend when I started a home business because she was no longer doing the business.

I would agree about the wear on the needle& changing it after about 8 hours. Also,my dealer gave a sewing class& recommended using Inspira needles as they are known for their quality as far as fewer burs. You might consider Schmetz titanium coated needles as they are longer lasting with the higher speed embroidery sewing too. It's worth spending a little more to get a good result. I hope this helps you. God's blessings.:~D

My first thing I would do would to make sure that my bobbin area was clean of any lint, or thread, then I would change needles. What is your thread,fabric, and stablizer that you are useing with what kind of design? Is some of it denser than other parts? H&*

Wow!! Thanks for asking the question, You all helped me as well. Will have to change my needle and see how it workes. Thanks everyone for helping me as well!!!

Here is my tip: I keep a 3 x 5 card, whenever I do a design I add the stitches up; when it reaches 100,000 I automatically change the needle. That way I do not encounter problems with threads breaking in the middle of a design. I also use ORGAN needles size 90/14 always.

With some designs, it helps to slow down your machine.