When dry flours are required to be made, one may get it done at the commercial flourmills that are available at any nook and corner of any town all over India. Or, one may grind it at home in the domestic flour mill. However, though grinding flours is possible in a heavy duty mixer-grinder, it will put a lot of load on the mixer, and may damage parts if done too often.
Dry roasting of grain should be done in a heavy large pan which allows easy stirring and movement of grain. While dry roasting, put grain in pan, do not add any oil, etc. and keep stirring grain bottom to top, for even roasting. Unless mentioned, roasting should be done, just enough to dry up moisture,and make the grain light, not to give it colour.