Apparatus for controlling the movements of a reed carriage during warping

An apparatus for controlling the movements of a reed carriage carrying a reed of a warping machine during warping a package from warp sections wound in succession next to one another upon the warping drum of the warping machine, comprising:

• a warping drum upon which there are wound the warp sections;
• a reed carriage cooperating with the warping drum for winding the warp sections thereon;
• a reed carried by said warping carriage;
• a reed carriage-displacement spindle for displacing the reed carriage in order to produce shifted depositions of the layers of the warp sections during the winding operation;
• pre-settable change-speed gearing for driving the spindle as a function of the rotation of the warping drum;
• a processor provided for the warping machine;
• means for infeeding data relevant to the displacement of the reed carriage during winding of a warp section;
• said processor calculating on the basis of the infed data relevant to the displacement of the reed carriage during the winding of a warp section containing a predetermined number of threads the required number of revolutions of the reed carriage-displacement spindle;
• means for infeeding the further data to the processor regarding the warp sections to be wound;
• said processor calculating on the basis of said further data the number of revolutions of the reed carriage-displacement spindle needed to be accomplished in the opposite rotational sense in order to displace the reed carriage-displacement spindle, following completion of the winding of a warp section, back into a starting position for the winding of the next warp section;
• said processor delivering upon recall signals;
• means responsive to said signals emitted by the processor for initiating the return displacement of the reed carriage;
• said processor is structured such that it calculates a value serving as the basis for the return displacement of the reed carriage from infed data relating to the number of revolutions of the reed carriage-displacement spindle for the winding of a warp section and from infed data concerning the thread number of the next warp section to be wound;
• said value being stored in the processor;
• said processor having means which when actuated and with the warping drum stationary enables recall of said value in the form of output signals;
• a drive motor for the reed carriage-displacement spindle;
• a drive motor for driving the warping drum;
• said drive motor for the reed carriage-displacement spindle being independent of the drive motor for the warping drum;
• said output signals controlling the drive motor for the reed carriage-displacement spindle;
• change speed gearing;
• differential gearing for rotation of the reed carriage displacement spindle in both directions of rotation;
• said differential gearing having a planetary web which is rigidly connected for rotation with said spindle;
• said differential gearing further including two drive gears;
• one of said drive gears being connected for rotation by means of the change-speed gearing with the drive motor for the warping drum and the other drive gear being rigidly connected for rotation with the drive motor for the reed carriage-displacement spindle.