you need to read your batting package- some need to be quilted every 2" some allow up to 10" between quilting lines- and everything in between. also the distance needs to be in both directions- if you simply make *tunnels* the batting can separate-pull apart in there will be areas with none & areas with gobs- if the batting says quilt every 4" there should be a 4" square of quilting lines- closer is ok- wider is not good.
follow the recommendations on the packaging and you will do fine.