I can't seem to get the tension settings right on my serger. I'm using Woolly Nylon in the loopers, and Maxi-Lock in the needles. But, the left needle thread always seems loose, no matter what I do. I've dialed the tension to 8, and it helps some, but the top is super tight then.
I'm going through 3 layers of a very thin terry material, if that helps.
HI, You may have thread or lint sticking in the tension guide. Take a piece of unwaxed dental floss or heavy thread(like topstitch), lift the pressure foot to release the tension (take out regular thread) & pull the heavy thread through the tension disk a few times to see if it will dislodge whatever is holding the tension open (sometimes you need to wiggle it from side to side as you are pulling). If that doesn't work it may mean going to the technician.
I know it has been a long time since this message was posted but I just have to say thanks. Today is my first day with my Janome 3434D from Hancocks. I knew I wouldn't get much help after the sale but the price was so good I just couldn't pass it up. I have spent the last two nights reading the instructions and going over 2 books from the library. Today was a day to myself and I have spent a lot of it making little swatches, doing the things illustrated in the Janome instruction book. I managed to make a nice 4-thread seam that was balanced without much trouble and moved on to the 3-thread and the rolled hem, picot edge and narrow-hem. All this was done on firm muslin. Then my thread broke and I decided to return to the 4-thread. The rest of the day has been spent on threading and then the biggest mess you have ever seen trying to set the tension on that 4-thread.
I had written down my settings for the good one I had going earlier. Why wouldn't they work this time? Thank you so much for your suggestion to floss the tension disks. I had some heavy gold thread to sew jeans with and it did the trick. I am so relieved. Maybe I am going to be able to master this after all...with some help from my friends. Thank you so much.