Abstract:
An encoder is adapted to be opposed to a scale provided with a plurality of marks or slits arranged in a first direction at predetermined intervals. A plurality of detectors is arranged in a second direction perpendicular to the first direction while being staggered in the first direction, each of which detects a position of each of the marks or slits, and the plurality of detectors being operable to respectively output an detection signal which has a first frequency. A first signal generator is operable to generate an first output signal which has a second frequency which is 2n-times of the fist frequency based on the detection signal output from a first detector of the plurality of detectors. A second signal generator is operable to generate a second output signal which has the second frequency based on the detection signal output from a second detector of the plurality of detectors. A third signal generator is operable to generate a third output signal which has the second frequency based on the detection signal output from a third detector of the plurality of detectors. A fourth signal generator is operable to generate a fourth output signal which has the second frequency based on the detection signal output from a fourth detector of the plurality of detectors. A controller is operable to perform a switching control between a first predetermined control based on one of: 1) the first output signal and the third output signal; or 2) the second output signal and the fourth output signal output from the encoder, and a second predetermined control based on the first output signal, the second output signal, the third output signal, and the fourth output signal.
Abstract:
A liquid ejecting head is operable to eject liquid toward a target medium. A light emitter is operable to emit light. A light receiver is adapted to receive the light emitted from the light emitter, and operable to output a signal in accordance with an amount of the received light, thereby detecting a position of the liquid ejecting head. A transparent member is disposed between the light emitter and the light receiver. A first line pattern is provided with the transparent member so as to oppose the light emitter, and includes first light transmitting sections and first light shielding sections which are alternately arranged in a first direction with a first pitch. A first actuator is operable to move either the light receiver or the transparent member in a second direction perpendicular to the first direction, thereby varying a distance between the transparent member and the light receiver.
Abstract:
A position detecting device for detecting a position of an object, includes a light emitting portion that emits light, a light receiving portion that receives the light from the light emitting portion, and a scale that is arranged between the light emitting portion and the light receiving portion, and includes a position detecting pattern and a smear detecting pattern. The position detecting pattern has a first light transmitting portion for transmitting the light from the light emitting portion and a first light interception portion for intercepting the light from the light emitting portion which are alternately arranged in a detection range of the object. The smear detecting pattern for detecting smear of the scale has a second light transmitting portion for transmitting the light from the light emitting portion and a second light interception portion for intercepting the light from the light emitting portion which are alternately arranged.
Abstract:
There is provided a liquid ejecting apparatus for ejecting liquid to a printing material, having a platen for supporting the printing material, an ejection head for ejecting the liquid to the printing material by reciprocating on the printing material supported by the platen, an optical sensor reciprocating together with the ejection head and having a light emitting section for emitting light toward the printing material and the platen and a light receiving section for receiving light reflected from the printing material to optically detect whether or not the printing material exists, a usage measuring section for measuring usage of the liquid ejecting apparatus and a correcting section for correcting a result detected by the optical sensor based on the usage measured by the usage measuring section.
Abstract:
A print control system according to the present invention comprises: a paper rear edge holding/driving control part for driving and controlling a paper feed motor so that the rear edge of a paper, which is fed by the paper feed motor, is held in a predetermined holding region; a usual paper feed control part for controlling the paper feed motor so as to carry out a usual paper feed operation; and a control selecting part for selecting one of the paper rear edge holding/driving control part and the usual paper feed control part on the basis of the kind and feed amount of the paper and the presence of detection of the rear edge of the paper.
Abstract:
The present invention relates to a liquid ejecting apparatus including: a movable head provided with a plurality of nozzles for ejecting a liquid; a carry unit for carrying a medium in a predetermined carrying direction; and a sensor for detecting an edge of the medium, the liquid ejecting apparatus controlling ejection of the liquid from the plurality of nozzles in accordance with a result of the detection of the sensor. In this liquid ejecting apparatus, the position, in the carrying direction, of the sensor is at the same position of or on an upstream side of a nozzle located most upstream in the carrying direction, of among the plurality of nozzles. In this way, it is possible to arrange the sensor for detecting the edge of the paper at the most suitable position, and to suppress waste of ink that is ejected from the nozzles.
Abstract:
A control circuit 200 for a carriage motor 60 has a speed differential generation circuit 206. The speed differential generation circuit sets a speed differential &Dgr;V at a constant value during a period P1, and the constant speed differential &Dgr;V is inputted to three operation elements 210, 212 and 214. Also, the speed differential generation element 206 uses the actual differential (Vt−Vc) as the speed differential &Dgr;V after the period P1.
Abstract:
There are provided a first navigation unit (transmitting side unit) 10 having a reader 13 for reading at least map data from a map information storage medium 14 and a controller 15 for controlling a system, and a second navigation unit (receiving side unit) 40 having a controller 41 connected to the control unit 15 through a serial communication line 30, buffer memories 42, 46 for storing therein image data from the reader 13, a display image memory 43 for extracting and copying the data in the range required for displaying from the map data developed on the buffer memories 42, 46, and a display controller 44 for displaying the image data on a display 45. The image data (transfer information) with an identification number of a detailed image concerning a rout selecting point approaching just before is stored in the buffer memory 46 with an enough time margin. At a determined display timing, display command information including the identification number is transmitted from the controller 15 to the controller 41 so that the display unit 45 displays the detailed image based on the image data.
Abstract:
There is provided an apparatus and a method of detecting a home position of a carriage, achieving a less manufacturing cost. The apparatus includes a position detecting part to detect a position of a carriage driven by a motor; a first drive control part to control the motor so that the carriage is transferred toward a frame of a printer until being stopped, the frame being provided at a home position range side; a second drive control part to control the motor so that the carriage is transferred toward another frame of the printer until being stopped, the other frame being provided opposite to the frame provided at the home position range side; a third drive control part to control the motor so that the carriage is transferred to a predetermined position close to the home position range; and a selection control part to select one of the first, the second, and the third drive control parts and control the selected drive control part, thus detecting a home position of the carriage based on a result of the selective control and the output of the position detecting part.
Abstract:
A printing apparatus arranged to perform printing while a monochrome printing head and a color printing head are moved in a direction in which the two heads are moved, the printing apparatus being arranged to print a plurality of patterns in which the relative quantity of deviation of printing timings of the two heads is changed in a stepped manner to cause a user to select a pattern having the smallest quantity of deviation among the plural patterns. Then, the selected pattern is used as a central value when a plurality of patterns in which the relative quantity of deviation of the printing timings of the two heads is changed in a stepped manner are furthermore printed to cause the user to select a pattern having a smallest quantity of deviation from the plural patterns. The above-mentioned process is repeated as necessary. As a result, the operation which is performed by the user to adjust the printing position can simply and easily be performed. Control is performed in such a manner as to change color to be printed by the color printing head whenever an adjustment mode in which the relative quantity of deviation of the printing timing is adjusted is started.