Step motor error Janome My Craft step motor error shows up on screen and then stops. Turn machine off, sometimes comes back straight away then another time it may be a day or so later. Is this a motor problem or circuit board problem

There are 2 stepper motors, in this machine. One is for the embroidery arm (the one you attach the embroidery frame to), and the other is inside the top (under the cover/which is under the spool holder) for the side-to-side/front-to-back motion of the needle (during embroidery stitches). If these get ANY debris/lint in them, they cannot return to the correct point, so the machine (sensing this) stops you, as incorrect positioning could break your machine. I have had my son clean 2 of these, so far, and then they have worked fine. The shops tend to want you to dump the machine, or pay for a complete new part, when my experience is that you just need someone, who is mechanically minded, to open it up, and carefully clean it.

If it really is your motor overheating, you either need it serviced, or replaced, possibly with another machine which is more suited to the type of sewing you do.