Hello all.
I am new here, but I have learned much by searching the forums.
My wife and I just purchased a barely-used Econosew DNU-1541s (Jukie 1541s Clone) in beautiful condition. My wife is a very experienced sewer, and I am just learning to sew.
We recently hired an experienced technician to check over and adjust the machine, as this is our first walking-foot machine. The technician sold us a replacement "M-size" bobbin case, as the original bobbin case's tension spring was slightly out-of-round. The replacement bobbin case is shown on the right-hand side of the attached picture. The original bobbin case is shown on the left - inserted into the hook's carrier. I removed the carrier to clean and investigate.
Notice that the original bobbin case's spring latch and protrusion are oriented at 90-degrees, relative to the bobbin case opening at the 12-o'clock position. This bobbin case inserts with a definitive "click", as the protrusion matches the notch in the hook's carrier.
In contrast, the new bobbin case's spring latch and protrusion are oriented at approximately 110-degrees, relative to the bobbin case opening. The new bobbin case's protrusion does not match the notch in the hook's carrier. Therefore, the bobbin case doesn't appear to lock into the carrier or onto the carrier's post.
My wife sewed an entire day with this new case, before experiencing a thread jam and needle break. It appeared to me that the new bobbin case had rotated within the hook carrier.
My Questions: Does Juki (and the clones) sell two styles of "M-sized" bobbin cases for their machines? How can we ensure that we are ordering the correct bobbin case - with the latch and protrusion at 90-degrees, relative to the bobbin case opening?
I just ordered a Juki OEM bobbin case the other day, but I'm now concerned that I will be receiving the wrong style bobbin case.
Thanks in advance for your help!
Dale