Maize Mill Project Final Design Review ME 430 DigitalCommons, 2 Jun 2017, Grinding maize is nothing new, many different methods have been tested and used throughout the world Each method has its own take on creating crushed maize either for cornmeal or flour Some methods commonly used are the Metate y Mano, the hammer mill, and the Chard #140 burr plate The Metate y Mano is old .