I have a tacsew T111-155. I just purchased it a couple of months ago. I am using #69 Nylon bonded thread. It was sewing just fine, then I changed the color I was working with, now the thread is bumpy on the back side. It is very loose. I have played with the tension but, I can not seem to get it right. I have been sewing for many years but all of my machines came with troubleshooting guides which were a big help. The manual that came with my tacsew does not have such a feature. Can anyone give me any sort of feedback as to what might be going on? Is this caused by the bobbin tension or either of the two thread tensions on the top of the machine?
HELP!
Thanks Everyone
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