Why does my machine make a knocking noise-have cleaned the bobbin works & put in new needle

SOURCE: my needle won't pick up the bobbin thread

My sewing machine is a Brother LS1217, well actually it is my son's, and he uses it very seldom. I went over to put in a new needle and I cleaned it top and bottom, put in a new bobbin, and a new needle and the needle won't pick up the bottom thread. What am I doing wrong? Please help me!! It has to be something simple, as this is such a simple machine! [email protected]

SOURCE: Having trouble with bobbin thread. Needle not reaching bobbin.

They make so many needles now that it is hard to keep up. That does seam to be the problem though. Try a longer needle before you try to warranty the problem. I believe this will take care of the problem. Hope this helps. Please re-post with updates. Thanks.

SOURCE: wont pick up the bobbin thread. Cleaned out,

If the machine is not picking up the thread it may need retiming.

SOURCE: Brother CS-8150 Problems with bobbin thread

Double check to see if the bobbin is in upside down and the thread is feeding from the bobbin spool in the wrong direction.

I did this once after several years using the same machine, some days are just not as easy as they should be!

SOURCE: bobbin and shuttle case pop out of machine .

You might need to clean the shuttle assembly.

1. Raise the needle bar to its highest position and remove the bobbin case.

2. Push levers sideways of the shuttle assembly and liftshuttle and shuttle race cove out by the center pin.

3. Clean the shuttle race of any lint or small particles of thread with a small brush.

4. Put a drop of oil on the center pin of the shuttle and on the shuttle race.

to reassemble, hold sjuttle by center pin and it carefull into assembly opposit the shuttle driver. Slip shuttle race cover into place. Snap the levers into position.

Occasionally remove the needle plate and clean feed dog with soft brush.

I hope that helps!