Abstract: A motor control determines if a motor is rotating at steady state velocity and then populates a table with information about each individual motor sector. At steady state velocity, the duration of the motor within an electrical sector is measured. The duration of the complete mechanical rotation of the motor is determined. The controller determines a ratio of the measured duration of the sector to a duration of a complete mechanical rotation of the motor. The ratio of sector duration to rotation duration is stored in a table. The controller is configured for controlling the motor using the table values.

Abstract: A device and method for communicating between networked devices that define a path having a plurality of device positions includes designating a source device for a communication stream wherein the source device has a first port to communicate in a first direction of the path and a second port to communicate in a second direction in the path with devices networked to the source device. A port is selected from one of the first port or the second port of the source device for defining a direction of the communication stream from the source device. A hop count is provided indicating a relative location of a destination device for the communication stream, the hop count being an integer number of network device positions from the source device to the destination device along the path from the selected port.

Abstract: A conveyor controller for being implemented into a conveyor system includes control circuitry and one or more network interfaces for coupling with other conveyor controllers. In one embodiment, the control circuitry configured for detecting whether another conveyor controller is connected and to determine which network interface is used in order to set the direction of the conveyor system. In another embodiment, the control circuitry is configured, to receive configuration data from a conveyor controller connected to a network interface, and to detect if another conveyor controller is and to transmit configuration message to another conveyor controller that includes additional configuration data associated with the conveyor controller. In still another embodiment, the control circuitry transmits configuration data to a replacement conveyor controller upon getting a request from the replacement conveyor controller that has been connected to a network interface.

Abstract: A motor control system for controlling a motor having multiple coils, includes a motor control circuit for providing control signals for controlling a motor, such as PWM signals. A motor drive circuit is coupled to receive the control signals and is configured for providing current drive signals to the multiple coils of the motor. Circuitry measures a plurality of signal values that are reflective of the level of the current drive signals provided to the multiple coils of the motor. Selection circuitry coupled to receive the measured current signal values is configured to dynamically select certain current signal values from the measured plurality of signal values and is further configured to exclude at least one of the current signal values that is indicative of a possibly erroneous or unreliable value.

Abstract: A conveyor controller for being implemented into a conveyor system includes control circuitry and one or more network interfaces for coupling with other conveyor controllers. In one embodiment, the control circuitry configured for detecting whether another conveyor controller is connected and to determine which network interface is used in order to set the direction of the conveyor system. In another embodiment, the control circuitry is configured, to receive configuration data from a conveyor controller connected to a network interface, and to detect if another conveyor controller is and to transmit configuration message to another conveyor controller that includes additional configuration data associated with the conveyor controller. In still another embodiment, the control circuitry transmits configuration data to a replacement conveyor controller upon getting a request from the replacement conveyor controller that has been connected to a network interface.

Abstract: A conveyor controller for being implemented into a conveyor system includes control circuitry and one or more network interfaces for coupling with other conveyor controllers. In one embodiment, the control circuitry configured for detecting whether another conveyor controller is connected and to determine which network interface is used in order to set the direction of the conveyor system. In another embodiment, the control circuitry is configured, to receive configuration data from a conveyor controller connected to a network interface, and to detect if another conveyor controller is and to transmit configuration message to another conveyor controller that includes additional configuration data associated with the conveyor controller. In still another embodiment, the control circuitry transmits configuration data to a replacement conveyor controller upon getting a request from the replacement conveyor controller that has been connected to a network interface.

Abstract: A conveyor controller for being implemented into a conveyor system includes control circuitry and one or more network interfaces for coupling with other conveyor controllers. In one embodiment, the control circuitry configured for detecting whether a another conveyor controller is connected and to determine which network interface is used in order to set the direction of the conveyor system. In another embodiment, the control circuitry is configured, to receive configuration data from a conveyor controller connected to a network interface, and to detect if another conveyor controller is and to transmit configuration message to another conveyor controller that includes additional configuration data associated with the conveyor controller. In still another embodiment, the control circuitry transmits configuration data to a replacement conveyor controller upon getting a request from the replacement conveyor controller that has been connected to a network interface.

Abstract: Methods, apparatuses, and program products for controlling a conveyor. One embodiment of the method includes operating a motorized roller of the conveyor to rotate in a first direction corresponding to a direction of travel, and in response to detecting that a jam has occurred, operating the motorized roller to rotate in a second direction opposite the first direction. Another embodiment of the method includes sending a message to a second controller controlling a downstream conveyor requesting data to determine whether the downstream conveyor is occupied by an article. In response to determining the downstream conveyor is not occupied by the article, operating a motorized roller of an upstream conveyor to convey an incoming article at a target speed, and in response to determining the downstream conveyor is occupied by the article, operating the motorized roller to convey the incoming article at an adjusted target speed slower than the target speed.

Abstract: Method and apparatus for controlling a conveyor system including a conveyor zone having a plurality of conveyor regions. A zone controller is configured to track the position of one or more articles within a controlled zone. The zone controller may be operatively coupled to controllers of adjacent zones, and may receive and transmit data relating to the position of articles in the controlled zone and whether the zone is accepting articles from the other controllers. Articles are moved within the controlled zone by selectively activating the zone based on determined positions of articles within the controlled zone, the positions of articles within adjacent zones, and/or the operating mode of the zone. The zone controller may thereby operate cooperatively with adjacent zones to manage spacing between articles by selectively positioning multiple articles within the zone, and may accumulate or discharge articles from the conveyor system in a desired arrangement.

Abstract: Method and apparatus for controlling a conveyor system including a conveyor zone having a plurality of conveyor regions. A zone controller is configured to track the position of one or more articles within a controlled zone. The zone controller may be operatively coupled to controllers of adjacent zones, and may receive and transmit data relating to the position of articles in the controlled zone and whether the zone is accepting articles from the other controllers. Articles are moved within the controlled zone by selectively activating the zone based on determined positions of articles within the controlled zone, the positions of articles within adjacent zones, and/or the operating mode of the zone. The zone controller may thereby operate cooperatively with adjacent zones to manage spacing between articles by selectively positioning multiple articles within the zone, and may accumulate or discharge articles from the conveyor system in a desired arrangement.

Abstract: Methods, apparatuses, and program products for controlling a conveyor. One embodiment of the method includes operating a motorized roller of the conveyor to rotate in a first direction corresponding to a direction of travel, and in response to detecting that a jam has occurred, operating the motorized roller to rotate in a second direction opposite the first direction. Another embodiment of the method includes sending a message to a second controller controlling a downstream conveyor requesting data to determine whether the downstream conveyor is occupied by an article. In response to determining the downstream conveyor is not occupied by the article, operating a motorized roller of an upstream conveyor to convey an incoming article at a target speed, and in response to determining the downstream conveyor is occupied by the article, operating the motorized roller to convey the incoming article at an adjusted target speed slower than the target speed.

Abstract: Various methods, apparatuses, and program products that are used to control at least a portion of a conveyor, determine information about an article conveyed by the conveyor, or otherwise operate a conveyor are provided. One method includes detecting whether a second conveyor controller is connected to the first conveyor controller and, in response to detecting that there is a second conveyor controller connected to the first conveyor controller, identifying whether the second conveyor controller is connected to a predetermined network interface of the first conveyor controller. The method further includes configuring the first conveyor controller to rotate a motorized roller in a first predetermined direction if a second conveyor controller is connected to the predetermined network interface and configuring the first conveyor controller to rotate the motorized roller in a second predetermined direction if a second conveyor controller is not connected to the predetermined network interface.

Abstract: Various methods, apparatuses, and program products that are used to control at least a portion of a conveyor, determine information about an article conveyed by the conveyor, or otherwise operate a conveyor are provided. One method includes detecting whether a second conveyor controller is connected to the first conveyor controller and, in response to detecting that there is a second conveyor controller connected to the first conveyor controller, identifying whether the second conveyor controller is connected to a predetermined network interface of the first conveyor controller. The method further includes configuring the first conveyor controller to rotate a motorized roller in a first predetermined direction if a second conveyor controller is connected to the predetermined network interface and configuring the first conveyor controller to rotate the motorized roller in a second predetermined direction if a second conveyor controller is not connected to the predetermined network interface.