Is there a secret to keep a quilt straight on the longarm frame when rolling?
In order to keep a quilt straight when advancing during the quilting process, there are several things you can do to ensure your backing, as well as the entire quilt sandwich, is rolling square and straight, and staying that way as you quilt it:
1. Be sure the backing is square.
Bring two opposite edges of the backing together (selvedges if they are still intact), and lay them on the belly bar of your machine, with the fold hanging down.