Do you have your manual? Are you sure it's threaded correctly? Floriani thread is picky. You want to run it a bit loose. Same for the bobbin...run it a bit loose. I hold the bobbin case (with the bobbin inserted on the palm of one hand, and when I pull on the thread coming off the bobbin case, the case will lift off my hand and as I raise it, it will slowly drop back onto my palm. May have to gently wiggle the thread...but for me, I like it to where it barely comes off my hand and goes back down slowly.
I then do a test stitch...and if the bobbin thread shows on top & or the top thread breaks...I loosen the top tension 1/4 turn and try again (note that once I have the bobbin tension set, I don't change it...all adjustments are done on the upper threads).
I run the upper a bit looser than most..when I pull on the thread coming out of the needle...the needle will start to flex/bend, but then the thread will pull out with some tension, but not break...pull straight to the back. Make sure the upper is threaded properly, and the thread is not hanging somewhere.
There is a Toyota Group on Yahoo:
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https://groups.yahoo.com/neo/groups/toyotaEMB/info > Lots of help there on tension, threading and using the machines. They have the manuals for downloading, and a free test design.
Marge Campbell
Hi i have just bought a Toyota expert ad850 and am having constant thread breaks, are there any tips as i am new to the embroidery world. Thank you