Abstract: In an apparatus on a spinning preparation machine, for example, a flat card, draw frame or the like, for monitoring at least one sliver, having two rotating rollers that form a roller nip through which at least one sliver passes, an optical monitoring arrangement (sensor) that monitors the presence of the sliver is provided in the vicinity of the rollers. To permit a reliable and trouble-free monitoring of sliver breakage in a structurally simple manner, the sensor arrangement is arranged in the region between the shared tangents to the peripheral surfaces of the rollers, the tangents being arranged perpendicularly to the running direction of the fiber, and the optical path of the sensor runs parallel to the axles of the rollers.

Abstract: In an apparatus on a spinning preparation machine, for example, a flat card, roller card, draw frame or the like, for monitoring fiber material, having at least one rotating roller that delivers fiber material, and a monitoring arrangement device that detects undesirable accumulations (build-up) of fiber material and emits an electrical signal is present. To permit immediate detection of undesirable accumulations of material in a structurally simple manner, the monitoring arrangement comprises a non-contact sensor arrangement (sensor), which is capable of detecting undesirable accumulations of fiber material.

Abstract: An automated test system for testing a device includes a processor, a test apparatus, and a barrier circuit. The processor is operable to generate a control signal, said control signal including test parameters. The test apparatus comprises a first connection operable to be connected to a circuit connection of the device, a second connection operable to be connected to a ground connection of the device, and a third connection operable to be connected to a chassis of the device. The test apparatus is further operably connected to receive the control signal from the processor. The test apparatus is operable to perform a first test on the device based on the test parameters. The barrier circuit is operable to detect movement in the vicinity of the device. The barrier circuit is operably connected to cause the test apparatus to stop performing a first test on the device upon detection of movement in the vicinity of the device.