Q:

What do I do if my machine is acting nosier than usual?

A:

The cause of your machine's irregular noise might be that the sewing machine is threaded improperly. Consult your sewing machine user manual for correct threading.

A damaged needle may also be the cause of your noisy machine - if needed insert a new needle.

If you are unable to figure out the cause of the noise have the sewing machine checked out by a professional.