My bobbin case jumps out while I am sewing on my bernina 1008.

SOURCE: Bobbin Carriage clanking noise, yet the machine sews fine??

If your bobbin area is making a noise, then do NOT sew with the machine until a reputable technician looks at it. You may have thrown something just a little off line - not enough to affect sewing NOW, but it could easily cause troubles down the line.

I suggest you call ahead and talk directly to the repair person - not to the sales person. Ask if you can bring in the machine while he/she is in the shop so they can listen while you run it.

You aren't trying to cheat the store out of the repair charge, just ensuring that the problem is diagnosed correctly.

You paid lots of money for this machine - it deserves good care.

SOURCE: bobbin tension

Bobbin Tension Adjustment:

1. Do you have a genuine Bernina bobbin casing and not an Oriental copy? If yes, proceed as follows:
2. To set the bobbin tension, wind a genuine Bernina bobbin with Metrosene thread, type 1161 white thread as your "gaging thread". Load the bobbin case so that the bobbin turns CW. Attach the bobbin case to the hook body from the machine. Wind a couple of revolutions of thread around your index finger with the assembled bobbin case and hook body dangling about 6" to 12" below your finger. Gently and rapidly move your finger back and forth in a "sideways" motion about 1/4" to create a gentle vibration on the bobbin assembly. (Do not shake the bobbin assembly up and down). When the tension is right, the bobbin assembly should fall slowly and as you stop the movement, the assembly should stop.
The adjustment is found on the small screw, holding the flat tension spring against the bobbin case. If the tension is too tight, one must loosen the screw (past) the desired location and always make the adjustment by tightening to the correct position.

There are other checks for tension imbalance and associated problems on the bobbin case that I won't go into here. For further information I can help you later on.

Top Tension Adjustment:

1. The top tension rarely changes and can be depended on throughout the life of that machine providing that tension assembly is maintained occasionally. This can be done by blowing out the tension disks with the presser bar lever in the up position. One can also drag or pull a piece of sized percale or muslin through the disks with the presser bar lever in a down position. Perhaps both methods can be employed.
2. Load the top of the machine with Metrosene 1161 thread in a dissimilar color. I prefer to use a pastel color so as not to create an optical illusion of imbalanced tension.
3. Sew a satin stitch (.25 on the Nova 900) in sized cotton muslin with a thin piece of paper between two plys of fabric. The width should not exceed 4.5mm (standard width on the 900 Nova), however the newer machines have wider stitch widths so one must adjust as specified. The result will be a slight amount of top thread in symmetric lines on both the right and left sides of the satin stitch.

Typically, the top tension will not need adjusting. If the Nova 900 needs adjustment, please ask for additional help.

SOURCE: How do you thread a bernina 1008?

I hope I can explain this in an understandable way!

1. Pull the end of the thread from the spool to the left and "click" it into the little metal guide (on the top of the machine) that is at the back of the long **** in the top. It's easiest to do this by holding the thread tight between your two hands, placing it behind the guide, and pulling forward until it clicks in.

2. for the remaining steps, let the thrread slide between the fingers of your right hand, keeping a little tension on it, as you thread the machine with your left hand.

3. Bring the thread end forward, laying the thread into the ****, and continue downward, along the right side of the vertical silver bar/hook thingy.

4. Bring the thread under that bar from right to left, and go back up towards the top of the wide **** in the front of the machine. As you pull up, the thread will click into the lower bar/hook thingy.

5. Lay the thread along the right side of the wide ****, go over the top of the needle bar (the part that goes up and down in the ****) and bring it down the left side. It will click into the needle bar.

6. Bring the thread back down towards the presser foot. Right in front of the screw that holds the foot on, there is a hook that opens on the left side. Slide the thread behind this hook, and then thread the needle from front to back.

7. Hold onto the end of the thread and run the needle down and back up once. Pull on the thread, and it will pull up a loop of the bobbin thread. Stick the tip of your scissors or seam ripper into the loop and pull the end of the bobbin thread out.

8. Slide your top thread through the slot in the presser foot so it comes out from underneath the foot, and you're ready to go! (Be sure and hold onto both threads for the first few stitches when you start a seam, to keep if from jamming up inside.)

Let me know if you need any clarification.

SOURCE: I have a Bernina Activa 130. The bottom threads

bunching threads bunching means that upper tension or threading is wrong

SOURCE: Bernina Bernette 65 sewing machine

I had the same problem. I'm a novice sewer. I just bought my machine. It did the samething, tension didn't work, the thread kept knotting up underneath, and the fabric kept curling up in the back.

I adjusted the tension knobs to no avail. Then it kept bothering me that it was curling up. I then decided to set the dials back to where the factory had them and adjusted the presser foot just a hair counterclockwise and I haven't had anymore problems.

The other day the needle almost broke because the tension was tight on the thread. You have to make sure that the needle is at it's highest point to get it to release the fabric so you have a thread tail.

This is my first purchased machine. I had a New Home years ago that was given to me, however it blew away in the tornado of 1991 in Kansas and I never replaced it. I really do love this machine. I don't believe I will ever want another.