Rya

I have an Millie which is 2007 (I think). When its in stitch regulator mode it has just started to race and break threads. It sew fine for an inch or so and does it again. I watched the video and adjusted the wheels but its still happening, its driving me crazy and its scary. Am I able to download a more comprehensive manual in PDF than the one supplied please, maybe that will give clues. All suggestions welcome.