I hav e Bernina 1150. When I attach the walking

Make certain the stitch length is not set to 0 or neutral.

a quilting foot or buy one with a round hole in it great

Hm, just guessing here.

Have you checked to make sure the walking foot (u-shaped) bar is still attached to the needle bar? Are the feed dogs still in the up position and operating like they should?

Learn How to Use Sewing Machine Walking Foot

Something else that I've run across in my sewing adventures is that walking feet need periodic oiling to keep them operating. Just manipulate the walking foot with your hands and watch where there are moving joints. Then apply a small drop of good quality sewing machine oil to each joint. Work it in and then wipe off the excess so it won't stain your fabric.

Keep in mind that that is not a walking foot... it's actually an even feed foot.

Approach your issue logically. Take the EF foot off and put your normal foot one. Does the sound return to normal?

If it does... keep in mind that your machine is exerting more effort to make the EF foot work. That can make a motor sound differently.

Make sure the feed dogs are in the raised position and that the presser foot has been lowered before beginning to stitch.

The foot is attached as normal, but when you're attaching it, the fork-shaped part that sticks out of the right-hand-side has to be hooked around the round pillar sticking out horizontally from the right-hand-side of the needle bar and that holds the needle securing screw. When the foot is down, you will see that the upwards motion of the needle bar raises the upper set of feed dogs on the walking foot - the whole purpose of the walking foot is to provide, effectively, a set of feed dogs on the top of the material as well as the toothed ones below the stitch plate - this allows multilayered or thick materials to be sewn as when doing quilting.

are you using a stretch twin needle; without one you'll get skipped stitches. However, the feed sounds more like a feed dog issue. Have you lowered the feed dogs for any reason? Will it sew on a woven cotton okay? If yes, but not feeding the knit then you could try turning up the presser foot pressure and see if that helps with the feed.

If you look across the needle plate with the presser foot removed and manually turn it through a stitch sequence, can you see the feed dogs coming up above the needle plate??

There isn't an automatic button hole on this machine. You can do it manually. Thread the bobbin thread as usual, but put it through the little hole on the hook in the bobbin case. Set the stitch length between 0 and 1, like a nice satin stich. Set the needle position to the far left and the stitch width to 2. Sew down the left side. Center the needle, set the width to 4 and lower the feed dogs, stitch about 6 stitches across the bottom. Then reverse the direction, set the needle to the right, stitch width to 2 and go back up the right side. Lower the feed dogs again, set a wide stitch and finish the top.

Another good option is to buy a universal presser foot shank from Bernina and then attach an old cam type buttonhole attachment from Singer. They make beautiful buttonholes and you can even do a keyhole button hole.

You have to lower the feed dogs and use a darning foot. Use straight stitch setting.

If you cannot lower the feed dogs, this model may use a cover plate.

You can also set the stitch length to zero and tape an index card over the feed dogs with a small opening for the needle.

You will be controlling the stitch length as you move the fabric by hand.

On a Bernina 1130 the power on-off knob and the feed dog raise and lower knob look similar and are next to each other on the end of the machine, making it easy to lower the dog assembly entirely, without realizing it. Make sure you didn't accidentally lower the entire feed dog assembly by turning the feed dog knob: you can tell as you turn it if the dogs are up or down. On the Bernina 1130 the knob, like the power should be in the horizontal position to be working both feed and power.