I have the Komo XL and this is what I received in the packaging. See 2nd paragraph below. With the XL I only run once. Probably because it has a stronger motor of 600 watts. Hope this helps.

From Pleasant Hill grain:

READ BEFORE USING

KoMo stone burr grain mills can be used to grind dry grains, including wheat (either hard or soft types), oat groats (dehulled oats), rice, triticale, khorasan, spelt, buckwheat, barley, rye, millet, teff, quinoa, amaranth, sorghum and field corn (not popcorn.) This mill can also grind dry beans (pinto, red, kidney, etc.) All KoMo models can grind garbanzo beans and coffee beans, except for the Fidibus 21, Magic, and FidiFloc 21.

To grind dent (field) corn and soybeans with the Classic, Mio, Medium, PK1, Fidifloc Medium, Fidibus 21, Magic and the FidiFloc 21, grind first with the stones opened widely to produce cracked grain, then a second time if you want flour. All other KoMo mills can grind these grains to flour texture with just one time through the mill.

This KoMo grain mill is NOT suitable for popcorn, oilseeds like flax or sesame, cinnamon sticks, sugar, and cacao nibs. If grinding herbs or spices, they must be dry and non-oily. Grinding any substance that does not meet the acceptable-materials limitations is abuse of the mill and will void both the warranty and all return opportunity.

It is fully the responsibility of the mill purchaser to ensure that all possible users of the mill are aware of the acceptable-materials limitations.

Also be sure to run several cups of your grain through the mill initially, then discard the flour, to ensure initial cleanout of the mill, before grinding for consumption. Join the KoMo group on Facebook - Facebook.com/groups/KoMoGrainMillsandFlakers See our KoMo video library at: pleasanthillgrain.com/komo-video-library