Relying on my intuition, I just made a batch of crackers, and afterwards looked up recipes. Quite simple, and tasty.
Method - Pre-heat oven to 325 DegF. In a food processor, blend 1/2 cup rye flour, 1/2 cup white flour and 1 cup Bisquik (contains flour, fat and leavening). Dissolve 1 tsp salt in 1/2 cup water and add to the flour mixture and process until a ball forms. Dump onto counter, knead to mix well and spread out. Cut in half and run the dough through a pasta machine, 3-4 times at #1 setting, then progress to #5 (of #9). Lay dough sheet on parchment paper over cookie tray and using a pizza cutter, cut into 1-1/2 inch squares. Bake for 20-25 minutes, until they start to brown. Allow to cool and break them apart along cut lines.
Comments - My first batch had 2 tsp salt and are a bit too salty - not as salty as potato chips, but a bit more than one might want for a cracker. I'm sure that whole wheat flour or corn meal would also make nice crackers. Also, instead of Bisquik, I'm sure more flour could be used and butter or olive oil used as the fat and either some baking powder or baking soda and sour milk used for the leavening. Topping with sesame seeds might be another option. After looking up recipes on line, none of them call for any leavening. None use a pasta machine and most bake the entire sheet without cutting the dough first, and break it up into irregular pieces afterwards.