when my singer does that, it usually means one of two things:
-time for a new needle
-i put the bobbin in backward.
how long have i been machine sewing? holy smoke! more years than i want to put in writing! :lol:
and yet ... i still forget sometimes which way the bobbin goes! just shows to go ya. :lol:
(it should be dropped in so that the thread pulls to the left.)
and ... i hate to admit it ... but every once in a while i don't thread the stupid thing properly. little pictures/arrows right on the machine and i still goof it up. (i'm quite dangerous if i sit down at the machine before i finish my first cuppa morning coffee! :roll: :lol: :lol: :lol: )