Need to know how to properly thread , the problem is once we start to sew it moves a little then stops thread tangles on bobbin and breaks from top. we try different ways of threading

This is common... and typically caused by operator error. First take the thread spool completely off the machine... and replace it then rethread making sure that it's done properly and with the pressure foot in the UP position

Second... make sure that when you are starting a seam.... grasp the thread ends until you are at least 2 inches into the seam.

Third if you are successful you are done.... if you still have loops and tangles below, adjust your top thread tension (little bits at a time) sew a little, then adjust again a little.

4th... it's unlikely... but it does happen. Every once in a while.. especially after a needle break... your bobbin can get a nick or burr... as can the hook. Inspect carefully with a strong magnifying glass. If you find a burr try some emery board or fine sand paper. While you are at it check your needle.. it may need replacing too.

Good luck!

bird nesting indicates that the needle thread tension is not tight enough
pull the thread out as if threading the needle and the tension is close when there is resistance to pulling the thread

try changing the needle---flat side goes to the back side of the machine
also check the top tension
depending on the fabric your sewing on--the needle & thread have to work
with the fabric--example light fabric needs a different needle & thread than
a heavy fabric
check to see if the thread is coming off the thread take up lever when you
sew.

The top thread is probably breaking due to the bobbin thread tangling.
First-off fit a new needle .... do that anyway ! And if you haven't recently cleaned your machine (and you should do it every week as a minimum), clean-out under the stitch plate, remove the hook, clean the hook race and give it a small drop of oil, even if you're using the lightweight plastic hook/shuttle. Check that you have adequate bobbin tension ... when you pull the thread out of the bobbin case there should be a bit of resistance --- technically, this should be set-up using the correct tool and a set of weights, but if there is no, or very little resistance, you need to increase the bobbin tension a little bit at a time using the small screw that holds the tension spring down onto the bobbin case. This is a very fine adjustment, so you may find you only need to turn the screw less than a quarter turn to get it right. Ensure that, when you thread the top thread up, you do-so with the foot lifted so that the thread goes down properly between the top tension discs.If you're still not getting anywhere, check the basic timing/needle depth by looking at some of my other posts on the subject.

Hi. You "feel" that the machine is threaded correctly? You should probably completely pull the thread out and start over, making certain that it is threaded correctly. Once that is done, double check to make sure the thread is pulled all the way into the tension discs. Make sure also that you have lowered the presser foot. Is the bobbin inserted in it's case correctly? Every aspect is critical to proper function. You may also want to revue your manual.

I had this same problem yesterday. I took apart the needle tension casing and now it doesn't get tangled or stop. The only thing is the bobbin is not sewing...it looks fine on the top, but the bottom is just loose loops.

TRY THIS, itma not be your model, but should help Title:
How do I wind the bobbin?
Pre-tension disk Bobbin winder shaft Bobbin

1. Pull up the spool pin as far as possible, and then put a spool of thread on this pin.
2. Pass the thread around the pre-tension disk. Make sure that the thread passes under the pre- tension disk.
Pre-tension disk Pulling it in as far as possible

Caution If the spool of thread is not in the right place, the thread may tangle on the spool pin.

3. Pass the end of the thread through the hole on the bobbin from the inside of the bobbin.
4. Put the bobbin onto the bobbin winder shaft and slide the bobbin winder shaft to the right.
5. Turn the bobbin clockwise, by hand, until the spring on the shaft slides into the groove of the bobbin. Spring on the shaft Groove of the bobbin

6. Turn on the sewing machine.
7. While holding the end of the thread, gently press the foot controller or press start/ stop button (for models equipped with the start/stop button) to wind the thread around the bobbin a few times. Then stop the machine.
Note

• If the sewing machine is to be operated using the foot controller, connect the foot controller before turning on the machine.
• When the foot controller is plugged in, the start/stop button cannot be used to start sewing (only for models equipped with the start/stop button).

8. Trim the excess thread above the bobbin.
Caution Make sure you follow the instructions carefully.
If you do not cut the thread completely, and the bobbin is wound, when the thread runs low it may tangle around the bobbin and cause the needle to break.

9. Slide the sewing speed controller to the right (to set the speed to fast).
(For models equipped with the sewing speed controller.) Sewing speed controller
10. Press the foot controller or press start/stop button (for models equipped with the start/stop button) to start.
11. When the bobbin seems full and begins spinning slowly, take your foot off the foot controller or press start/stop button (for models equipped with the start/stop button).
12. Cut the thread, slide the bobbin winder shaft to the left and remove the bobbin.
13. Slide the sewing speed controller back to its original position (for models equipped with the sewing speed controller).


Caution Not winding the bobbin properly may cause the thread tension to loosen, and may break the needle.
Wound evenly Wound poorly


Note

• When the sewing machine is started or the handwheel is turned after winding the thread around the bobbin, the machine will make a clicking sound; this is not a malfunction.
• The needle bar does not move when you slide the bobbin winding shaft to the right.

Setting bobbin case tension:
Put wound bobbin in bobbin case. Thread it in case. Hold the thread and carefully let go of the case only holding bobbin thread. The case should NOT move. Quickly let your hand drop 2-3 inches to let the bobbin case free fall for 2-3 inches, the bobbin case should move slightly then stop. It moves because it let’s a little thread off the bobbin. It should then stop .5"- 2" of thread should release. If so, your bobbin case tension is right. If it’s right then begin to look at your top thread tension. Always Always start with a properly adjusted bobbin case, then adjust your top tension accordingly.

Hi, Is it your bobbin thread or the top thread wrapping around the bobbin. I just got a used PE150. The top thread keeps wrapping around the bobbin. It is not picking up the bobbin thread. Did you find a solution for your problem?
katfou

Verify that your thread path is correct when winding the bobbin. It has a distinctive path including a tensioner that helps your thread wind smoothly. Do not use a bobbin that is not wound smoothly because (as you already know) it could possibly break needles and damage the machine.

Brother CS 80 Sewing Machine Bobbin Rewind