I even called a repair person out to check my machine. He said nothing wrong with this machine , that'll be $125.00
Turned out it wasn't the machine it was the table that wasn't adjusted right. Be sure your quilt is flat on the base
under the needle. If its not flat the needle is pushing against the fabric. Mine worked just fine after I got the quilt flat.
And yes you have to move your whole body to keep up with the machine,or you get stuck out of balance.
Good Luck SSUZZ