Used by
Janome machines, and Elna machines that read JEF.
What it keeps
Stitch positions, jumps, colour stops, a Janome thread slot for each stop, and a hoop code.
What it can't hold
Exact colours, and explicit trims. JEF has no trim record, so the machine decides whether to cut from the length of each jump, usually about 3 mm or more.
What to watch for
If you need a cut after a very short jump, a JEF machine may not make it. Inspect the jumps before you run it.
Best for
Any Janome or Elna machine that reads JEF.