Sewing Machine problems

[flagracer]

I only have to add the cd for my machine also showed the drop method for testing the bobbin tension. I didn't mean it could be the only problem but that it is a possible solution and the correct tension is important. I understand doing the other things first in case it was working earlier. In my case it was not adjusted correct from the factory so that was the solution.

[Dixiecat]

4) Remove the needle and look closely at it. Look at the point, is it dull or flat. Insure the needle is straight by rolling it on the table top.
Re-insert the needle

Unfortunately, domestic sewing machines do not have round needle shanks. Domestic sewing machine needles have a flat rear shank so they don't roll. However, if you place the needle flat on the table, the shaft should be parallel to the table surface.

[Canuck]

Given, domestic needles are more expensive than industrial needles, one tends to push the boundaries of the lifespan of the needle. I tend to change the needles frequently. I can hear if a needle is worn out as it tends to thump more than when a new one is installed.
If I might suggest getting at least one new pack (of 5) for every project. This way you can stockpile and not worry about the condition of a needle at 2:00am on a Saturday knowing that is your last and the shop won't be open till later in the week.
(I purchase needles in packages of 100 and I have 10 boxes on hand at the moment)