Apparatus and method for controlling the apparatus

Abstract

An apparatus for moving a unit to execute scanning includes a scanning unit including a motor, an encoder for outputting a signal according to movement of the unit, a detection unit for detecting a current supplied to the motor, a speed control unit for executing a speed control of the motor according to the signal output from the encoder and the current detected by the detection unit, a movement control unit for setting a threshold value, moving the unit by driving the motor, by using the speed control unit, and a current control unit for setting a value greater than the predetermined value according to the threshold value and value of the current detected by the detection unit at a predetermined timing during a time period while the unit is moving.

1 . An apparatus configured to move a unit to execute scanning by driving a motor, the apparatus comprising:
 an encoder configured to output a signal according to movement of the unit;   an acquisition unit configured to acquire a value of current to be output to the motor;   a speed control unit configured to execute control of a speed of the motor according to the signal output from the encoder and the value of the current acquired by the acquisition unit;   a movement control unit configured to set a predetermined value as a threshold value, move the unit by driving the motor, by using the speed control unit; and   a current control unit configured to set a value greater than the predetermined value according to the threshold value and the value of the current acquired by the acquisition unit at a predetermined timing during a time period in which the unit is being moved.   
     
     
         2 . The apparatus according to  claim 1 , further comprising an second acquisition unit configured to acquire information about a speed of the motor according to the signal output from the encoder, wherein the speed control unit is configured to execute speed control according to the speed information acquired by the second acquisition unit and a target speed, and execute another speed control according to the value of the current acquired by the acquisition unit and the threshold value. 
     
     
         3 . The apparatus according to  claim 1 , wherein the current control unit is configured, if it is determined by the movement control unit that the unit has been stopped according to the signal output after the predetermined timing from the encoder, to discontinue a supply of the current to the motor. 
     
     
         4 . The apparatus according to  claim 1 , wherein the motor is a direct current motor. 
     
     
         5 . The apparatus according to  claim 1 , wherein the unit includes a reading sensor configured to read an image of a document. 
     
     
         6 . The apparatus according to  claim 1 , wherein the unit includes a recording head. 
     
     
         7 . A method for controlling an apparatus including a motor, which is a source of driving a unit, and configured to move the unit, an encoder configured to output a signal according to movement of the unit, and a acquisition unit configured to acquire a value of current to be output to the motor, the method comprising:
 controlling a speed of driving the motor according to the signal output from the encoder and the value of the current acquired by the acquisition unit;   moving the unit by driving the DC motor, by executing the speed control; and   setting current to a value greater than the predetermined value according to the threshold value and the value of the current acquired by the acquisition unit at a predetermined timing during a time period in which the unit is being moved.