A method of operating a device to receive a print medium is disclosed. Rotation of a receiving device to receive a print medium is detected, whereby the rotation is caused by an external force. An assisting force is applied to further rotate the receiving device in response to the detected rotation.

A lifting system for inner yarn rails relates to the technical field of twisting and weaving equipment in factories, the system comprises an in-air conveying rail, and a carrier unit, wherein the in-air conveying rail is configured to convey the carrier unit, and the carrier unit is configured to carry a winding package; an inner yarn-carrier-lifting section is arranged on the in-air conveying rail, the inner yarn-carrier-lifting section is positioned on both sides of a twisting machine; when the inner yarn-carrier-lifting section rises, it communicates with the in-air conveying rail; when the inner yarn-carrier-lifting section descends, it approaches the position of a spindle bucket of the twisting machine. The winding packages delivered each time by one carrier unit can correspond to every spindle position of the twisting machine, dramatically improving the delivery efficiency of the winding packages.

A drive mechanism that drives a rotator to rotate includes a main motor, an assist motor, and processing circuitry. The main motor drives the rotator. The assist motor drives the rotator and assists a drive of the rotator by the main motor. The processing circuitry controls a speed of the main motor so that a rotational speed of the rotator is constant, and controls a motor voltage of the assist motor so that the motor voltage of the assist motor changes according to a change in a motor current of the main motor.

A yarn feeder may comprise a metric-sized motor and a winding wheel, and a drive shaft axially protruding from a first end of the motor is configured to connect to a rotating member. The winding wheel formed in a tube shape comprises a first end and a second end, and an interior channel is adapted to axially penetrate through the winding wheel from the first end to the second end thereof. The interior channel is configured to accommodate the motor, and the rotating member is coupled with the interior channel such that the motor is configured to drive the winding wheel through the rotating member. The motor in the present invention is a metric-sized motor which is not only easy to buy in the market but also reduces manufacturing cost and the volume of the yarn feeder.

A yarn feeder may comprise a metric-sized motor and a winding wheel, and a drive shaft axially protruding from a first end of the motor is configured to connect to a rotating member. The winding wheel formed in a tube shape comprises a first end and a second end, and an interior channel is adapted to axially penetrate through the winding wheel from the first end to the second end thereof. The interior channel is configured to accommodate the motor, and the rotating member is coupled with the interior channel such that the motor is configured to drive the winding wheel through the rotating member. The motor in the present invention is a metric-sized motor which is not only easy to buy in the market but also reduces manufacturing cost and the volume of the yarn feeder.

Apparatus and methods are provided for a self-contained tension control system. An example self-contained tension control system can include a brake system configured to provide tension friction to a web, a tension transducer to provide tension information indicative of tension of the web, a controller configured to receive the tension information, to compare the tension information to set point information, and to provide a command signal to the brake system, and an enclosure configured to enclose the brake system, the tension transducer, and the controller, the enclosure including a first web opening and a second web opening configured to allow the web to enter the enclosure and to pass through the enclosure to equipment downstream of the self-contained tension control system.

A sheet conveying apparatus includes: a plurality of conveyors provided along a sheet conveying direction; a plurality of main driving parts that is respectively provided to the plurality of conveyors and independently drives the conveyors; an auxiliary driving part that drives the plurality of conveyors; and a transmitter that transmits driving force between the plurality of conveyors and transmits driving force of the auxiliary driving part to the plurality of conveyors.

An apparatus, to control a motor from an instructed phase indicating a motor rotor target phase, includes a detector, a phase determiner, a converter, and a controller. The detector detects a motor winding driving current. The phase determiner determines a rotor rotation phase from the detected driving current. The converter converts a detected current value in a stationary coordinate system into a current value in a rotational coordinate system from the determined rotation phase. The controller includes a first mode for controlling the driving current to cause a determined phase deviation between the instructed and rotation phases to decreased, and a second mode for controlling the driving current from a current having a previously determined magnitude. On switching the mode from the second to the first mode, the first mode target value is set from a driving current value corresponding to a current component represented by the rotational coordinate system.

The present invention relates to a device (20) for winding a longitudinally cut material web having multiple longitudinal strips (12) on a plurality of winding tubes (16) to form in each case a wound roll. The device comprises an axle (24) and, mounted on the axle, a plurality of ring-shaped winding drives (22) that are individually controllable in their operating position. Each winding drive (22) forms an external-rotor electric motor and comprises a static interior tube (40) and a rotatable external tube (50). The external tube (50) that is rotatable on the rolling bearings (48) bears, on its interior, a device for providing an excitation magnetic field (52) that forms the external rotor of the electric motor.

A paper pickup mechanism includes a mechanical frame, a pickup roller module, a feeding roller module, a driving device, a separation roller module and an energy storage element. The mechanical frame has a platform. The pickup roller module is pivoted to and connected to the mechanical frame. The feeding roller module is pivoted to and connected to the mechanical frame. The driving device is mounted to the mechanical frame. The separation roller module is pivoted to and connected to the mechanical frame. The energy storage element is mounted between the mechanical frame and the separation roller module. When the separation roller module rotates together with the feeding roller module in a forward direction, the energy storage element accumulates energies. When more than one piece of paper is fed into the paper pickup mechanism, the energy storage element releases the energies.