An image forming apparatus includes: a transceiver circuit configured to transmit a signal. A carriage having a recording head is movable relative to the transceiver circuit. A counter counts how many times the carriage moves. An amplifier circuit mounted on the carriage receives the signal from the transceiver circuit through a cable and amplifies the received signal. A carriage controller changes a gain of the amplifier circuit, based on a count value of the counter.

A printer includes: a carriage that includes a recording head and is configured to move in a width direction intersecting a medium transport direction; a liquid storage unit that stores an ink supplied to the recording head, is mounted on the carriage, includes a filling port configured such that the ink is filled therethrough, and is formed of a light-transmissive material; a visual recognition unit that is provided in the liquid storage unit and is configured to visually recognize a position of a liquid level in the liquid storage unit; an illumination unit that emits a light beam; and a light guide unit that guides the light beam emitted from the illumination unit such that the light beam is applied to the visual recognition unit from a rear side, when the visual recognition unit faces a front side.

Provided is a printing device that includes a Y-axis encoder outputting a pulse signal corresponding to a position of a head part in a predetermined direction, a Y-axis counter counting a count value based on the pulse signal from the Y-axis encoder, a control part that performs a first and a second controls, and a determination part determining that the Y-axis encoder is normal when a count value equal to or greater than a predetermined number is counted and determines that the Y-axis encoder is abnormal when a count value less than the predetermined number is counted in the first control. The control part shifts from the first control to the second control when the Y-axis encoder is determined to be normal, and the control part does not shift from the first control to the second control when the Y-axis encoder is determined to be abnormal.

The printing apparatus includes a carriage having a print head mounted thereon, a carriage guide configured to guide movement of the carriage and to support the carriage, an optical scale member having an optical scale, an optical sensor mounting member having an optical sensor mounted thereon to read the optical scale, the optical sensor mounting member being fixed to a support surface of a support wall of the carriage, and a head portion of the fixing screw configured to be switched between a fixed state in which the optical sensor mounting member is fixed to the carriage and a release state in which the fixed state is released. The head of the fixing screw is located on a side opposite to the support surface with respect to the support wall when the optical sensor mounting member is in the fixed state.

A liquid discharge apparatus includes: a discharge head including nozzles; a head scanning mechanism that reciprocatingly moves the discharge head in a main scanning direction; a conveyer that conveys a recording medium in a sub-scanning direction; and a controller. In one pass, the controller executes: recording processing in which an image is formed on the recording medium by moving the discharge head in the main scanning direction and discharging liquid from the discharge head; setting processing in which the discharge head moves to a starting position of the recording processing for a subsequent pass following the one pass by changing a moving direction of the discharge head at a standstill position; and conveyance processing in which the recording medium is conveyed in the sub-scanning direction.

A recording apparatus is provided for determining a relative moving speed between a recording head and a recording medium based on application amount information and power information corresponding to power for driving a heating element. In a case of the power amount in a first amount, the moving speed is determined as a first speed in a case where an application amount is equal to a predetermined amount, and the moving speed is determined as a speed higher than the first speed in a case where the application amount is smaller than the predetermined amount. In a case of the power amount in a second amount smaller than the first amount, the moving speed is determined as a speed higher than the first speed in a case where the application amount is equal to the predetermined amount.

There is provided an image recording apparatus including: a head; a driving element; a controller configured to output, to the driving element, a driving signal having a first voltage level or a second voltage level greater than the first voltage level; and a moving mechanism causing one of the recording medium and the head to move relative to the other of the recording medium and the head. The controller sets the voltage level of the driving signal to be the first voltage level in a case that the controller causes the head to move relative to the recording medium at the first velocity; and the controller sets the voltage level of the driving signal to be the second voltage level in a case that the controller causes the head to move relative to the recording medium at the second velocity.

A controller of a motor includes: an acceleration/deceleration time constant storing unit that stores an acceleration/deceleration time constant; a position command creating unit that creates a position command value based on the acceleration/deceleration time constant; a position detection unit that detects a rotation position of the motor; a speed command creating unit that creates a speed command for the motor on the basis of the position command value and a position detection value detected by the position detection unit; an ideal response computing unit that computes an ideal response from the position command value; and a response comparing unit that compares the ideal response with an actual response detected by the position detection unit. The response comparing unit changes the acceleration/deceleration time constant stored in the acceleration/deceleration time constant storing unit when it is determined that the ideal response does not match the actual response.

An electric apparatus for controlling movement of a target object by performing first and second feedback controls, based on a detection signal obtained from detecting the movement of the target object, generates an operation quantity on the target object based on first and second operation quantities for the second feedback control if one of a predetermined target value and an estimated first state quantity of the target object is higher than a first threshold value, and generates the operation quantity on the target object using only the first operation quantity from among the first and the second operation quantities if one of the target value and the first state quantity of the target object is lower than the first threshold value.

After an ejector passes an ejection end position, a controller controls a second conveyor to convey a sheet in a sub-scanning direction. The ejection end position is a position at which ink ejection by the ejector ends before reaching a turn position. An ejection start position is a position at which ink ejection by the ejector starts after turning at the turn position. Based on positional relationship between the ejection end position and a standard position, the controller adjusts timing of conveyance of the sheet or shift the turn position from the standard position in a direction of reducing an overlap between a sheet conveyance period after the ejector passes the ejection end position and an ejector deceleration period before the ejector reaches the turn position. The standard position is a standard turn position of the ejector and is determined from the ejection end position and the ejection start position.