A printer includes an ultraviolet (UV) curing device having UV light emitting diodes (LEDs) to cure UV curable inks ejected onto a surface after the surface travels past a plurality of printheads in the printer. A UV detector having UV sensors is positioned opposite the UV curing device so the UV sensors and UV LEDs are opposite one another in a one-to-one correspondence. A controller operates the UV curing device to direct UV light into the UV detector and receives electrical signals generated by the UV sensors. The controller compares these electrical signals to a predetermined threshold to identify defective LEDs in the UV curing device. The controller then determines how to move the UV curing device across the path of the surface to irradiate areas of the surface previously opposite the defective UV LEDs.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.

A feed device includes: a feed tray configured to accommodate a roll, in which a medium is rolled in a roll shape, rotatably; a housing configured to support the feed tray installable; and a pull-back mechanism configured to pull back the medium unrolled from the roll in a direction orthogonal to a rotation axis of the roll in conjunction with an outward movement of the feed tray from the housing in the direction orthogonal to the rotation axis of the roll.

A feed device includes: a feed tray configured to accommodate a roll, in which a medium is rolled in a roll shape, rotatably; a housing configured to support the feed tray installable; and a pull-back mechanism configured to pull back the medium unrolled from the roll in a direction orthogonal to a rotation axis of the roll in conjunction with an outward movement of the feed tray from the housing in the direction orthogonal to the rotation axis of the roll.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.

There is provided a printing apparatus including: a frame; a platen facing a thermal head; a moving mechanism having first and second rollers; a motor; a transmitting mechanism; a clutch provided on the transmitting mechanism; a communication interface performing communication with an external apparatus; and a controller. The controller is configured to: start the driving of the motor toward one direction in a state that the clutch is in the connected state, after receiving a print signal, indicating that the print medium is located at a printable position; and to allow the clutch to be in a cutoff state and stop the driving of the motor toward the one direction, after ending of printing in accordance of the receiving of the print signal and before arrival of the moving mechanism at an end on a second side, opposite to the first side, in the specified direction of the moving range.