Abstract: A controller includes a first counter that counts an operating time of cutting machines in a predetermined unit and a display controller that puts the operating time that has been counted into a doughnut graph and displays the doughnut graph on the display and the display controller displays, if the operating time is less than a predetermined time, the doughnut graph in a first color on the display and displays, if the operating time is the predetermined time or more, the doughnut graph in a second color that is different from the first color on the display.

Abstract: A three-dimensional printing apparatus includes a movable member with a holder secured thereto, a sensor detecting whether a position of the movable member is equal to or higher than a first position or is lower than the first position, a storage device storing an origin position lower than the first position by a first distance, and a determination device determining whether deviation from the origin position has occurred. The determination device includes a first moving unit moving the movable member to the origin position, a second moving unit moving the movable member toward a second position, which is higher than the origin position by a sum of the first distance and a second distance, and a first determination unit determining that deviation from the origin position has occurred unless the sensor detects that the position of the movable member is equal to or higher than the first position before the movable member reaches the second position.

Abstract: A three-dimensional printing apparatus includes a movable member with a holder secured thereto, a sensor detecting whether a position of the movable member is equal to or higher than a first position or is lower than the first position, a storage device storing an origin position lower than the first position by a first distance, and a determination device determining whether deviation from the origin position has occurred. The determination device includes a first moving unit moving the movable member to the origin position, a second moving unit moving the movable member toward a second position, which is higher than the origin position by a sum of the first distance and a second distance, and a first determination unit determining that deviation from the origin position has occurred unless the sensor detects that the position of the movable member is equal to or higher than the first position before the movable member reaches the second position.