Bernina 1005 manual

The is, as the , a fully mechanical machine and therefor I hope that I can solve the problem. For now I'll concentrate on the bobbin area.

When slowly hand-cranking the machine the bottom thread is still slack when the top-thread tightens the loop. This causes the bottom-thread to lay as a rather loose chain of "S"-shapes or weave pattern on the bottom of the fabric.

This happens regardless how tight I screw the bobbin-case tension-spring. The bottom thread seems only to be pulled tight at two occasions: 1 When the feed-dogs advances the fabric and 2 when a "hump", on the opposite side of the rotary hook strikes the bottom thread; but that happens after the top-thread has tightened the loop.

I went through all the check-points and found only the hook-timing off by a degrees. Adjusted the hook-timing according to the manual.

Top-tensioner, bobbin tension, feed-dogs, needle position etc all fine The bobbin thread seems very loose when the hook wraps the top-thread around the bobbin-case. I just can't find out why or find any decent information how it supposed to be with, or the exact working of, a rotary hook.

I'm not a sewing machine tech, but I can't see any other cause than something wrong with the lower thread tension. Look at section Do you have the weights they refer to to test the tension? If not, I would progressively tighten the bobbin case adjusting screw to see if I can't tighten up the lower thread. Worst case, try replacing the bobbin case. The problem stays. Also tested the top-tensioner with a weight and that one was more or less "spot-on".

To lessen the problem, and to pull the bottom thread tightly up "through" the fabric , I've to sew with the top-tensioner set at 8-to-9 out of I have a new bobbin case; same problem. I've seen the sketchy animation and understand the principle fully.

Agree, something happens at a certain moment time that causes too much slack in the bottom thread. The minor detail now is to spot that moment and what causes it. I'm still full of hope!! Patricia Magallon. Here's a link to the page in the user manual that shows how to raise and lower the feed dog.

To adjust the feed dog height, you have to loosen an Allen-screw, accessible via the bobbin hatch, top right-hand side. Fix Your Stuff Community Store. Back Answers Index.

Sewing Machine Check out these guides for information on repairing and dissembling your sewing machine. Endeavor endeavour Rep: 25 3 1.

Answer this question I have this problem too Subscribed to new answers. Is this a good question? Yes No. You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive. If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

Would you like to receive an email when new answers and questions are posted? Please enter your email address. Bernina Manual. Get this manual by email. Need help? Post your question in this forum. Report abuse Libble takes abuse of its services very seriously.

Product: Spam. Hateful or violent content For example, Anti-Semitic content, racist content, or material that could result in a violent physical act. Personal or private information For example, a credit card number, a personal identification number, or an unlisted home address.

Promotion of regulated goods and services.