Abstract: A print head is operable to perform printing with respect to a medium. A motor is operable to move the print head. A guide unit is operable to guide the print head along a predetermined direction. A determination unit is operable to determine whether or not the print head performs a stick-slip operation. A motor control unit is operable to generate a command value for controlling the motor when moving the print head. The motor control unit generates a command value for moving the print head at a predetermined target speed on the basis of determination of the determination unit that the print head does not perform the stick-slip operation and generates a command value for moving the print head at a target speed faster than the predetermined target speed on the basis of determination of the determination unit that the print head performs the stick-slip operation.

Abstract: In an apparatus for printing on a continuously moving sheet of work material, a frame is provided and defines a work supporting surface over which a sheet of work material is advanced in a first coordinate direction longitudinally of itself. An elongated support is mounted to the frame and extends transversely across the work supporting surface. A print head is mounted to the elongated support and is movable across the support, as well as between a forward and rearward position. During operation, as the work material is continuously advanced through the apparatus, the print head traverses the support and simultaneously moves between the forward and rearward positions, such that the print head has a component of speed in the first coordinate direction approximately equal to the rate at which the work material is advanced.