Try sewing a straight stitch with your machine, in regular mode. Is there a problem with the upper or lower thread? If there is, then it is a tension problem or other adjustment problem. IF the machine sews perfect in regular straight stitch mode, and is wonky with your stippling, then the problem is most likely with the way you are moving the fabric. Try running the machine slow, and moving the fabric slow, but with a rhythm. Medium speed. If you pull the fabric, it is going to make long stitches and then you have to be concerned about breaking your needle. It is better to have tiny little stitches. Once you get started, you will pick up the feel for it, and then it will become almost as perfect as your sewing machine stitch. Practice on scraps. Notice where your problems are; are they in the loop part or the straighter part? If you can isolate which part is the problem, then you can concentrate on that. But if your machine is running great on straight stitch, then my guess is that you are tugging on your fabric to pull it through. Good luck and keep working at it. If it isn't a problem with the machine, then it will work itself out with practice.
I have the same problem and got both answers from my instructor. She also said "Keep practicing, you will get better."
If you are talking about for free motion quilting, try to keep your speed nice and steady-this takes practice but eventually you'll catch on. If you can keep the speed of your machine and the speed at which you are guiding the quilt even you won't get so many loops, big stitches, knots,etc.
Troubles on the bottom of the fabric usually have to do with the top tension. Try tightening it up and see.
thank you itworked i'm so glad i've never touch the tenions i always leave it on auto thanks once again
That was my answertoo. I do a lot of stipple on quilts . That is always the problem if the bottom gets "eyelashes"