Welcome to the Quilting Board!
I am a bit frustrated. I will admit, I am newer to sewing. I learned on my mom's pfaff machine and this 7700 Horizon was my first machine. It feel like I am constantly having tension issues or bobbin issues. The bobbin casing will spin under the face place. I wish I was joking about that.
I have taken it to the dealer multiple times. Out of the 2 years I have had it, I have gotten about 14 hours total out of it. That is just not ok by any means. I bought this machine for clothes and quilting. When it works, it works like a charm but the slightest things seem to throw a self destruct switch.
I did get the positioning recalibrated as it was 1/16th of an inch off when put into a FMQ mode, thus hitting the foot but the bobbin casing and top thread tension is just killing me. Does anyone have any suggestions?
Any yes, I have already replaced the bobbin casing after sewing into it... more times that I want to admit or think about.
I have had some problem with bobbin case on the 7700. It happens when the chase jumps out of its proper place. I am not sure I can explain it clearly. On mine there are two areas on and in the bobbin are that if they are not aligned will cause the bobbin thread to jam. There is a tiny metal spring type on the outer ring that must be on the right side of a protruding catch on the case. If not the thread will catch and pull the case out of alignment. I hope this is clear. I can do it but not sure I can explain it.
Do you mean the bobbin jumps up and the upper thread winds around the bobbin, therefore jamming everything? I do a lot of decorative work, with thicker threads in the bobbin, and this was happening to me when the thread jerked. I've rather fixed this by sticking a small "jello bubble" type thingamy under the bobbin cover. You know the hot/cold clear plasticky round bits that go in the top of the taps [or do you call them faucets], well I got some mini ones from the hardware store - not sure what they were for - maybe used under items to protect timber surfaces. My newest Brother has a small extension of curved plastic beneath the bobbin cover, I'm assuming it has a purpose, but this little treasure, if put in the right spot, will hold the bobbin down enough allowing the top thread to pass over. I have to wonder if the mfs have boo-booed somewhere. Also find pre-wound bobbins do this as well when half empty.
So sorry for all your troubles. I also have a 7700 and had some issues with it. The shop where I bought my machine was very helpful and walked me through them. The biggest thing was the speed. This machine goes so fast, so turn the speed down to where you are comfortable with it. Needle........I changed to a Janome needle for quilting/embroidery and that also helped. Then the tension needs to be on "7" instead of auto. Also, he had me turn my stitch down to .02, just during free motion. I hope this helps!! Merry Christmas!
I am soooo sorry that you are having this problem. You are not alone, if you check the Janome yahoo group or sewingpatternsreview, you will see there are many in this boat. I bought my Horizon 7700 three and a half years ago, when it was brand new, and have had tons of problems...two new motherboards, the same bobbin nonsense, another "E4" error whenever I use the thread cutter, self threader broke, single hole plate also caused E4 or E5 errors, so don't use that anymore, tension craziness, trouble with the bobbin winding properly...and it has been in the shop so many times, a long drive and two week wait....and all I can get is "operator error" from the dealer (I have been sewing for almost 50 years). I spoke with the Janome guy at the Houston quilt show and he suggested I contact the district sales manager, only problem is how to find out who that is???? No way is the dealer going to tell me! At this point I am ready to cut my loses and buy a new (NOT Janome) machine. I realize this is not much help, but at least you know that it isn't you!!!
slbram17 - sorry, I knew I'd confuse. my old xp computer is caput and am trying to break in a new one -win7 - some of my old programs don't work, so hope this will. These little surface protectors are adhesive, so I stuck one to the underside of the bobbin cover above the bobbin. There were 25 on the card, hanging on a hook in the hardware store where they have felt gliders for under chairs and to protect furniture from heavy ornaments etc. They look like bubble wrap for packaging Have been trying to post a pic but for some reason this horrible computer doesn't seem to recognise it as a picture - another obstacle to fix. Hope you have more luck with your problem. Cheers, Gay