Originally Posted by
topstitch
I was told by a tech. (I am a LA quilter) it is a skipped stitch when the needle punctures the fabric and does not pick up the bobbin thread from underneath. If your fabric does not show the holes where the needle went through the fabric it is USUALLY the timing or the stitch regulator. If it is the timing, then the missed stitches will USUALLY occur when the machine is traveling left and/or going upwards as you are standing at the needle side of the machine. Notice the use of the word USUALLY.
I checked my quilt and sure enough there were no needle holes where it skipped. i'm hoping it will be a problem with the stitch regulator. I mailed it back to the grace company, maybe they will resolve my problem. Thanks for the info.