Arrangement for pneumatic false-twist spinning

An arrangement for pneumatic false-twist spinning of a fiber strand, comprising:

• a fiber strand supply unit,
• a false-twisting zone disposed downstream of the fiber strand supply unit, and
• a withdrawal device disposed downstream of the false-twisting zone,
• wherein the false-twisting zone includes a fiber strand intake nozzle disposed downstream of the fiber strand supply unit, a false-twisting nozzle disposed downstream of the intake nozzle and upstream of the withdrawal device, and a suction guide roller exhibiting a circumferential guide surface for guiding the fiber strand disposed between the intake nozzle and the false-twisting nozzle,
• and wherein the suction guide roller is driven to rotate at a circumferential speed such that its circumferential guide surface has a greater speed than the delivery speed of the fiber strand supply unit and the withdrawal speed of the withdrawal device, whereby edge fibers of a fiber strand being spun are taken along by the suction roller at an increased speed in comparison to core fibers of the fiber strand to thereby control winding around of these edge fibers when the false-twist is opened up.