What is the fine-grained topic of the following text: The Konica Minolta KM512 MN print head is a robust, shear mode, piezo on-demand print head that is usable in both binary and 4 level greyscale mode, providing variable drop size and higher print quality without the use of additional print heads. Only return the topic.
Konica Minolta KM512 MN print head features and capabilities