Singer error codes 6

You are getting a thread breakage error. I'm presuming that you are getting repeated error 06 codes to write in. Before I start, though, you also get that error code if your bobbin is out of thread. The thread sensor thinks your thread has broken because your thread is not seated at all, or not seated enough, between your tension disks, which are on the right side of your tension dial. Take the cover off the thread path (page 52 in your user's manual), lower your presser foot, and turn the tension dial to zero. Use UNWAXED dental floss, and floss between those disks. Chances are there is loose threads and/or lint between the disks, preventing the thread from seating properly. When threading, make sure that your presser foot is UP (tension disks are spread to accept thread), and apply tension to your thread, both at the top and bottom, to make sure your thread gets between those disks. Thread it a few times with the cover off, if necessary; you don't need to have it on to embroider, although you can't use your needle threader with it off.

Code 6 could also be that youare nesting under the hoop. If you are not nesting, check to make sure machine is threaded correctly.