I had the same problem ... slow down! I was told to put the machine at the highest speed & move fabric slowly. That does not work for me! I think it's an individual "feel" and only you can determine what is perfect for you. I slowed my machine down to medium speed so I feel more in control and it works for me! Also I had to tighten my top tension more than I thought to get the perfect stitch. I changed from an open toe foot to a round darning foot, made sure my "quilting" needle was brand new and same thread in top & bottom. Hope that helps.