摘要:
In one example, a torque control system for a sheet media pick mechanism to move a top sheet of media from a stack of media sheets into a nip between a pick roller and a separator roller. The torque control system includes a sensor to sense a number of consecutive pick failures and a controller operatively connected to the sensor to reduce a torque applied to the separator roller during a pick attempt after each pick failure in an amount corresponding to the number of consecutive pick failures sensed by the sensor.
摘要:
An image forming apparatus comprises a conveyance section, a plurality of sensors, an image forming section, a conveyance control section and a control section. The conveyance section forms a conveyance path for conveying paper. The plurality of sensors outputs detection signals indicating the existence of the paper at a plurality of positions along the conveyance path. The image forming section forms images on the paper conveyed by the conveyance section. The conveyance control section controls the conveyance of the paper conveyed by the conveyance section based on the detection signals of the plurality of sensors. The control section determines, in a case in which the detection signal of any of the plurality of sensors is abnormal, whether it is due to sensor failure or paper conveyance abnormality, and sets to ignore the detection signal of the failed sensor and continue the processing if it is due to the sensor failure.
摘要:
A printer includes multiple gear trains, each gear train to pick paper. The printer also includes a print media sensor to detect the presence of print media along a paper path, a user input control, and control logic coupled to the print media sensor and the user input control. Based upon receiving multiple signals from the user input control to resume printing, each such signal following an indication from the print media sensor that paper has not been picked, the control logic to cause a change-over to occur from one gear train to another gear train.
摘要:
A transport device includes a feed unit that feeds transport subjects being loaded in a loading portion one by one in a transport direction, a protrusion amount detection unit that detects a protrusion amount of the transport subjects from the loading portion in the transport direction and an overlap feed sign detection unit that detects a sign of occurrence of overlap feed of the transport subjects based on a detection result of the protrusion amount.
摘要:
A method and control system for controlling an installation (1) for gathering flexible individual products (10), in which installation a stream of collections (20), which are from supplied streams that each have one individual product type, can be formed and conveyed to further processing (3). Each collection (20) has a predetermined quantity of individual products (10). Faulty collections (20) containing a supply fault with regard to one or several individual products are not processed separately but are regarded as faultless collections (20) under certain conditions. Accordingly, faulty collections advantageously not conveyed to a fault corrective action until a quota of the faulty collections exceeds a predetermined reference limit.
摘要:
A method for alerting a user when the time has arrived to replace a media feed roller on a printing device, employs statistical analysis of data gathered relating to the number of pages between misfeeds associated with the media feed roller. It has been ascertained that the misfeed rate associated with media feed roller failure follows a characteristic pattern, which may be treated as a step function. That is to say that, beginning with a new media feed roller, the feed failure rate, which is usually measured in pages printed between misfeeds, remains relatively constant. However, as the time for replacement nears, the graph begins to plunge precipitously, as misfeeds begin to occur with increasing regularity. After the plunge, the misfeed rate continues to increase, but at a decreasing rate. Eventually, the feed failure rate reaches a value that represents a misfeed during every page feed. The optimum time for replacement is deemed to be shortly after the graph begins to plunge. However, because there is a certain degree of randomness to the feed failure phenomenon, it is necessary that notification of the need for replacement of the media feed roller be given based on accumulated data sufficient to make a statistically valid directive to the printer user. The preferred method for providing a roller replacement directive to the user is to begin tracking feed failures when a feed failure rate value falls within a predetermined replacement range for the first time. After a statistically significant number of subsequent misfeeds indicate that the misfeed rate average is within the fixed replacement range, the replacement directive may be issued.
摘要:
In a method and apparatus for monitoring a yarn winding production process, the traversing amplitude and/or the traversing frequency are monitored by a cross-winding monitoring system, which supplies cross-winding signals over electrical lines to a control and information device, in which the signals are linked with set-point values and/or signals characterizing the winding operation. Conclusions are drawn from the linkage results as to a plurality of characteristics of the winding process, such as misfeeds, drum laps, bobbin laps, ribbon winding state, yarn tensioner function, yarn tension change, drum malfunction, cheese grading, type of cross-winding system and quality of the cheese.
摘要:
A base material processing apparatus includes a transport mechanism, a force detection part, a meandering prediction part, a processing part, and a controller. The transport mechanism transports an elongated strip-shaped base material in a longitudinal direction thereof along a transport path aimed by a plurality of rollers of the transport mechanism. The force detection part detects a force applied to a sensing roller in an axial direction of a rotation shaft thereof, the sensing roller being at least one of the plurality of rollers. The controller predicts the meandering state of the base material to output meandering prediction information, based on the force applied to the sensing roller in the axial direction of the rotation shaft thereof. The meandering prediction part corrects the widthwise position of the base material relative to the processing part, based on the meandering prediction information. Thus, the base material processing apparatus is capable of sensing the meandering state of the base material through the use of the existing rollers of the transport mechanism in the processing part, and is capable of correcting the widthwise position of the base material relative to the processing part.
摘要:
A sheet feeder includes a sheet platen, a pickup roller, a feeding roller, a regulating portion, a driving mechanism, a feeding control unit, a sheet sensor, and a determination processing unit. The feeding control unit executes a feeding operation by rotationally driving the pickup roller and the feeding roller in a state where the regulating portion is located at a retreating position. The sheet sensor is located at a downstream side in the feeding direction of the feeding roller. The determination processing unit determines whether the sheet feeding has succeeded or not based on a signal from the sheet sensor. After a start of the feeding operation, when the determination processing unit determines that the sheet feeding has failed, the feeding control unit once moves the regulating portion located at the retreating position to the abutting position and then executes the feeding operation again.
摘要:
Systems and methods are provided for predictively compensating for frequency-based shifts of the position of a web of print media in a continuous-forms printer. The system comprises a sensor and a controller. The sensor is able to detect lateral shifts of the web of print media traveling through the continuous-forms printer. The controller is able to identify a frequency of the lateral shifts of the web, and to steer the web based on the frequency.