Yes you can quilt straight lines with a longarm. If you do not have channel locks on your machine then you will need to use a longarm ruler. To use any type of longarm ruler, or guide, with your machine you need to have a ruler base. This is a large platform that attaches to the bed of your machine. You can not use your cutting rulers with your longarm. They are not thick enough. Contact your dealer or look on your brand of machine website to see what is available for your set up.