Method for the control of a power-loom yarn feed device
AssigneeIropa AG
InventorsPaer Josefsson, Patrik Jedheimer
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for the control of a power-loom yarn feed device, whereby a drive motor for a rotating winding element is accelerated, decelerated or stopped, on demand, for yarn storage and, in order to avoid slack yarn during the stopping of the motor, the motor is independently driven slowly during a crawl phase, such that the motor is first stopped and then after stopping is slowly rotated in the crawl phase.
Claims7
Method for controlling a weaving machine yarn feeding device (F), having a drive motor (M) for driving a rotatable winding element (4) in a predetermined winding direction, which winding element (4) pulls off a yarn (Y) from a yarn storage (1) and winds the yarn (Y) into adjacent windings on a yarn storing body, according to which method the drive motor (M) is accelerated, decelerated or stopped by a control device (C) depending on the yarn consumption from the windings on the storage body, the drive motor when controlled to stop being further driven at slow speed independent from yarn consumption in winding direction during a crawl phase for a predetermined time duration or over a predetermined rotational angle to remove a previously occurred yarn relaxation (L) from the yarn (Y) between the yarn storage (1) and the storage body (5), characterised in that the drive motor (M) first is truly stopped at a point in time (t2), and that the crawl phase (8) is initiated after the point in time (t2) of the stop in timewise or rotational angle related association either to the point in time (t2) of the stop or to the yarn consumption depending point in time (t5) of the re-start of the drive motor (M), respectively.
Method as in at least one of the preceding claims, characterised in that weaving pattern depending information either for at least several insertion cycles without any yam consumption or for subsequent insertion cycles with yam consumption is provided in advance, that said information is transmitted to the control device (C), and the control device initiates the crawl phase (8) prior to or exactly at the consumption depending subsequent re-start of the previously stopped drive motor (M) on the basis of the transmitted information.
Dependencies are inferred from the claim text.