I have a Janome 1600P on a small Grace SR2 frame, and had to purchase the stitch regulator separately from Sewing machines Plus if I remember right. The regular plug in must fit into your machine. When ordering you have to tell them if your machine has a two prong or three prong plug end. I'm talking about the part that plugs into the machine NOT the wall.
My machine only has an 11" throat for quilting....not much when you have to consider the amount of space that is taken up when advancing the quilt on the roll up bar. Quilting patterns are very limited knowing this. Also measure the length of your machine and find out if it will fit on the table carriage for the frame you choose.
Noot all frame manufactures provides a stitch regulator, but will offer one at an additional cost. At least this was my experience.
Oh...forgot to mention that stitch regulators run over $500 and they have been known to burn out. Also my experience!