A method and apparatus for calibrating a vacuum system in a printing device comprising obtaining a reference pressure value for a print zone of the printing device, measuring a calibration pressure value in the print zone of the printing device when the printing device is at an operating location and the vacuum system is in operation, determining an altitude based on the reference pressure value and the calibration pressure value and applying an operating setting to the vacuum system based on the determined altitude.

Provided is a conveyance apparatus capable of detecting the presence or absence of multi feeding with high accuracy even when a received waveform varies due to a noise from the circuit and an influence due to vibrations being fixedly generated noise components. The conveyance apparatus includes: an original conveying motor configured to convey an original; an ultrasonic transmitter, which is arranged at one of positions sandwiching a conveyance path along which the original is conveyed, and transmits an ultrasonic wave toward the conveyance path; and an ultrasonic receiver, which is arranged at the other one of the positions sandwiching the conveyance path, and receives the ultrasonic wave transmitted from the ultrasonic transmitter. The conveyance apparatus compares a received wave amplitude exhibited with sheet-presence against a threshold value determined based on a received wave amplitude exhibited with sheet-absence to determine whether the original is conveyed by the multi feeding.

A transmitter transmits ultrasound to the conveyance path. A receiver receives the ultrasound. A double-feed detector detects whether or not double-feed of a plurality of sheets has occurred. A controller causes the transmitter to transmit ultrasound at a first burst interval when determining the threshold value, and causes the transmitter to transmit ultrasound at a second burst interval, which is shorter than the first burst interval, when detecting the double-feed of sheets. A double-feed detector determines a threshold value that enables distinction between double-feed and single-feed.

A method for calibrating a thread storage unit that can be arranged at a workstation of a textile machine. The method comprises the calibration steps of: setting of a calibration torque of the electric motor in the control system, wherein the calibration torque is lower than the maximum torque acting on the thread guide arm due to the magnetic repelling effect of the coupling elements; activation of the electric motor of the drive unit for adjusting the thread guide arm with the calibration torque to a rest position against a stop of the thread guide unit by the control system; and storage of the set position of the thread guide arm and the electric motor as the zero position of the thread guide arm and the electric motor in the control system.

Example implementations relate to determining a correction factor that converts a measured sensor distance (228) to a calibrated sensor distance (222). The measured sensor distance may be based on an amount of substrate advancement through a web printing press (202) between detecting a mark (226-1, . . . , 226-N) on the substrate (204) at a first sensor (212) and detecting the mark at a second sensor (214). The calibrated sensor distance (222) may be the separation between the first sensor and the second sensor.

A sheet feed roller portion (12) feeds a plurality of bound sheets (S1) to a conveying path (18). The ultrasonic sensor (19) detects a voltage value that changes according to a thickness of the sheet (S1) at a measurement position (P2) on the conveying path (18). A determination processing portion (53) determines whether or not a voltage difference between voltage values of the sheet (S1) detected by the ultrasonic sensor (19) is equal to or greater than a preset threshold value. A light amount adjustment processing portion (54) adjusts a light amount of light emitted from a CIS sensor (23) and irradiated onto the sheet (S1) when the determination processing portion (53) determines that the voltage difference is equal to or greater than the threshold value.

An image forming apparatus according to the present disclosure includes: one or more memories; and one or more processors functioning by executing instructions stored in the one or more memories as the following units: a chart output unit configured to output a test chart obtained by executing post-processing on a sheet; a display control unit configured to display a screen containing information indicating a measurement position related to a position of the post-processing on the test chart; a setting unit configured to accept setting up of adjustment related to the position of the post-processing on the screen; and an adjustment control unit configured to adjust the position of the post-processing based on the setting through the setting unit.

A method of positioning a tape that includes determining an estimated position of a test element on the tape and rotating a spool that carries the tape in order for the test element to be positioned at a reading station. The estimated position of the test element is determined based on detected rotation of the spool, which can be measured at any shaft in the drive train. Also disclosed is a testing process for testing a sample deposited on a test element of a tape held on a spool of a cassette, a system for determining an estimated position of a test element on a tape which is carried by a cassette, and a memory storage medium associated with an in vitro diagnostic test cassette.

A transmitter transmits ultrasound to the conveyance path. A receiver receives the ultrasound. A double-feed detector detects whether or not double-feed of a plurality of sheets has occurred. A controller causes the transmitter to transmit ultrasound at a first burst interval when determining the threshold value, and causes the transmitter to transmit ultrasound at a second burst interval, which is shorter than the first burst interval, when detecting the double-feed of sheets. A double-feed detector determines a threshold value that enables distinction between double-feed and single-feed.

Provided is a yarn box, a yarn stripping method, an electronic device and a storage media. The yarn box includes a support, a yarn stripping rod and a yarn receiving rod; where a first end of the yarn receiving rod is connected to the support, a first end of the yarn stripping rod is slidably connected to the support, the yarn stripping rod is configured to slide to a yarn stripping position corresponding to a first yarn receiving rod among the yarn receiving rod when multiple yarn spindles are sleeved outside the first yarn receiving rod and the number of yarn spindles of the first yarn receiving rod reaches a set condition, the yarn stripping rod is provided with multiple yarn strippers corresponding to the multiple yarn spindles one by one, and the yarn strippers are configured to strip fiber yarn on outer surfaces of the corresponding yarn spindles.