Welcome from SC Texas. I have a Singer 401A and it does not beep. I have a Brother that does and as Tartan said if the presser foot is up it will beep and also if there is an error anywhere it will beep and stop. When mine does that I unthread it and take the bobbin out to make sure the bobbin case is clean, no lent or thread in it. then I put it back in rethread the machine and it works fine.