What size needle are you using? When I put my Janome on a frame, I was using a size 14 needle and got skipping. Went to a 16 and it stopped. Most of my quilting friends use either a 16 or 18 (for frame quilting).
Side note - same group of friends, several have done the Sharon Schambers cone-dip thing and it works - without leaving oily residue or spots.
eta: Another thought - maybe try slowing down. I have a friend who owns a shop, she has 2 Gammills with Statler Stitchers. She runs them at half speed because at full speed, she gets more skipped stitches. It might take longer to quilt the quilts, but it's a better quality product and less frustrating than running them full speed and having to rip out and re-quilt.
Last edited by Peckish; 08-27-2014 at 08:22 PM.