My sewing machine's needle hits the plate?

Question

What is the root cause of it? The needle is in right.

Answer 1

It's bent.  change it.

Answer 2

Also try to change the needle position. Some machines you can do this manually.  

Sometimes if you have sewn a button hole or decorative stitch the needle position has gotten stuck and didn't pop back to it's center.

Answer 3

Try a brand new needle.  The one in the machine now might be ever so slightly bent, and that would cause it to hit the plate.

Answer 4

check that you have the right plate on