When ever I do strip cutting I always cut the width of fabric in half before I cut strips. I get straighter cuts by doing this.
first I figure how many strips I need and how wide. This gives me the length of fabric I need. I add about 1 1/2 " and cut across the width selvage to selvage. I then cut this piece in half on the straight of grain then fold each piece and cut the width of strips I need. The extra 1 1/2" is for straightening the fabric. This is a little more work but I get better cuts this way. I hope this is can be followed, HA.
peace :D