How to adjust placment of twin needle so it doesnt hit edge of bobbin holder?

breaking needles from hitting can be from several problems
1-- needle /hook timing is out
2--needle thread tension is too tight pulling needle side ways
thread caught around bobbin holder is top thread too loose
take it in for a service check as the needle /hook timing is complicated to adjust and the problem could be more complicated than suggested

I have a Bernina 930 Record that will take twin (even triple) needles, so I don't know why your 1080 wouldn't. Just be sure your machine does not have the straight stitch plate on it, that your presser foot can accommodate zig-zag stitch, and that you carefully adjust any zig-zag stitch width so the needles do not hit the presser foot or stitch plate. I'd suggest installing the double needle and then carefully hand rotate the handwheel to see if the needles will hit anything. If you can make a full rotation of the handwheel without anything hitting, then slowly try it with the motor engaged.

On the right side you have two knobs to make adjustments. The lower knob will move the needle left or right so it won't hit the bobbin holder.

Hi, sounds to me like you haven't refitted the bobbin correctly
Regards
www.electronicrepairs.co

make sure that the needle was put in the needle holder correctly and tightened into the needle holder correctly..
if the needle was in the needle holder correctly and it's still hitting the bobbin carrage then the machine needs to be checked to see if the sewing machine needs a adjustment

try these sites they might have a video that would help
youtube
fixsewingmachines.com

If the bobbin has been inserted correctly and the needle keeps hitting something, check the bobbin and bobbin holder for damage (bent or missing parts) If there is no damage to either of these then the timing of the machine may need to be adjusted. This is usually best left to someone with sewing machine repair experience.

Check to make sure the needle is up all the way into the clamp. If the bobbin case now has sharp edges from the impact. polish away the sharpness with an emery board or simular. Once a needle is hit it canot be used again so always use a fresh needle.

Hello,
Here are several things to try.

* When you insert your new needle, make sure it’s positioned correctly (usually with the flat side away from the bobbin, but consult your manual), that it goes all the way into the holder, and that the screw is securely tightened.


If there doesn’t seem to be a problem with your needle, try the following:

* Check your pressure foot and make sure it’s attached securely.


* Change your pressure foot Your pressure foot may be bent, causing your needle to hit it.


* Don’t sew over pins a needle that hits a pin can break. Always remove the pins from your fabric before they reach your needle.


* Don’t pull your fabric as you sew. You could be bending your needle back, causing it to hit your needle plate instead of going into the hole. Just guide your fabric, letting it feed on its own.


* Check your needle plate and make sure it's securely in position.


* Change your needle plate. If you’ve been using a straight stitch needle plate (a plate with a small hole, often used for sewing fine, delicate fabrics), switch to a needle plate with a wider hole.


* Check the position of your needle. Sewing machines with zigzag capability allow you to adjust the position of your needle – right, left, or center. If your needle is not positioned correctly, it may be hitting your needle plate or pressure foot.


* Un-thread your machine and remove your bobbin. Clean any loose thread or lint out of your
bobbin case. Re-thread your machine, reinsert and re-thread your bobbin.

* Change your bobbin. There could be a nick along the edge of your bobbin spool that’s catching your thread as you sew.

Also, before you start to sew a seam, hold the upper and bobbin thread tails. Hold them back
and out of the way as you sew your first couple of stitches. This will keep them from getting
caught in your machine.

I hope these solutions help you.

That isn't the timing. If the hook is hitting the needle the hook is too far left - or close to the needle. It's adjustable by loosening the set screw at the base of the hook and by gently tapping the hook away from the needle. You want the hook to be close enough to the needle to pick up the thread loop that's formed just as the needle bar is rising.