How do i reset my janome mb4 machine? when it sews it is not aligned

This is a tension issue with the top thread and also the bobbin. There should be adjustments for it on both parts.

Hello, Jerry -

I doubt the kind of thread and pre-wound bobbins you use with your Janome MB4 sewing machine are the problem with the thread tangles and loops on the bottom and top of the items you are working on are the problem. Robinson Anton threads appear to be rated as high quality.

I suspect the problems are caused by the tensions for the top and bottom threads and / or how the bobbin is inserted in the bobbin holder. It is an embroidery sewing machine, is it not?

From the user manual for your model of machine:
https://www.janome.com/siteassets/support/manuals/embroidery-models/inst-book-mb-4en.pdf
on Page 81 (PDF image 84), the problem of the thread looping (last Troubleshooting issue on the page) may be caused by
- Needle thread tension too loose
- Bobbin not inserted properly
- Poor quality thread used (Note: I don't think that is the issue for you.)

I found a series of YouTube videos about the Janome MB4 machine, which may prove instructive. This is the link to the Part 1 video:
https://www.youtube.com/watch?v=8VL-ikUr3tQ
In the right sidebar of that page, you will see links to the first parts of the video series. As you choose subsequent parts of the video series, you will see additional links to other parts of the video series in the right sidebar.

I also found a longer video tutorial on YouTube for the Janome MB4:
https://www.youtube.com/watch?v=X_RJ8-kY5_o
The sections of the video on inserting the bobbin (starting at about minute 14:18) and threading the machine (starting at about minute 15:17) may be helpful.

If, after making sure you know how to insert the bobbin properly in the machine and after threading the machine properly and setting the tension for each needle, you still experience thread nesting, I suggest you locate a nearby authorized Janome sewing machine service center and pay to have the machine evaluated and adjusted so that it works properly.

Best wishes.

could be a computer problem, needs to be serviced

Change your needle and if it continues to happen, change the thread. Most likely your needle and thread are not compatible, ie the thread is too large for the needle's eye. Also, inexpensive thread will shred.

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Make sure you r sending design in correct format from memory mb4 reads only .jef format

If your embroidery is distorted be sure you are using the right stabilizer for the fabric you are doing the embroidery on and enough for the density of the design.

I hope that helps.

are you using a good thread and the same thread on the top and in the bobbin, different threads will sometimes act up. I also can not sew one brand of thread on my machine, try Mettler or gutermann's you can get them at JoAnn's or Fabricland. hope it helps good luck K

This is usually caused by the y axis movement system. Occasionally this system can come out of sync, and cause the issue you described. Your y axis pulse motor may be going bad as well. In either case it would be best to take your machine to a Janome dealer for repair.

It sounds like your x-axis sensor is either broken or malfunctioning. When the machine initializes, this sensor tells the machine when it has reached the furthest point in it's range of motion. If it is not working properly, the carriage will extend past it's normal range, and stop when it physically cannot move any further. After a specified amount of time the x-axis motor shuts off, and an error message will appear. For a certain diagnosis and repair, it would be best to take your machine in to a Janome dealer.

checks that the strip wire and strip wire sensor, this worked well.
(the strip threads is the small spring by which you spend the thread to thread)