Patent DE-19816189-A1 (DE)
Title: Cable twisting machine giving left and right twists
Inventor: KUEHNE REINHOLD
IPC: H01B13/02
Filed: 1998-04-14
Abstract: The machine for twisting a cable, with left and right twists, has drives (6, 9) coupled together by a common electronic synchronizing system relating to time, movement path, angle settings and/or with angular relationships. The synchronizing system is related to the movement path, angular setting, speed and/or acceleration of the twister (44), with an angle and/or rotary speed transmitter at the motor (6) and/or twister, linked to the input side of the synchronizing system. The synchronizing system has communication links for the exchange of time, path and/or angular related data, and especially nominal and actual values. They are used for the control of the drives (6, 9) through interfaces between the system and motors to receive, transmit and process the data. The communication link is a serial drive bus (10), especially in a ring structure and/or with time cycle synchronizing ratios, with the drives (6, 9) coupled through the interfaces. The drive bus system (10) is set up with a dispatcher structure and/or in a hierarchical layout on a master/slave basis. A drive unit (6, 9) is at least a part of the synchronizing system as a dispatcher and/or master over the bus (10) and/or gives the synchronizing cycle. The synchronizing system is implemented by a software module. The drive unit (6, 9) has a processing module linked to the interface, with an algorithm to process the background data or scan the current data. The drive (6, 9) is additionally linked to a field bus (11), on a higher plane than the synchronizing system, or with the drive bus (10) as required. The processing module is connected to the field bus (11) through the interface. The drive (6, 9) has a rotary speed and/or angle transmitter coupled to the drive motor (6) and an angle and/or rotary speed control linked to its input side, which is connected at the input side to the interface with the synchronizing system or its communication link and/or the drive bus (10). Static guides (41) for the cable strands (1) are on their movement path (2) through the machine. Further drives for the strand feed (3) and/or cable take-off (8a) are connected to the communication link and/or drive bus (10). An Independent claim is also included for a cable twisting operation, where a virtual guide axis is generated in the synchronizing system for a common delivery of the nominal values to the drives (6, 9). Preferred features: The guide axis or the nominal values are derived from the rotary angle and/or angular speed of the twister (44) and passed to the drive units. The guide axis or nominal value is computed from a nominal or actual take-off speed of the twisted strands (1) together with the twist lengths, in each bus cycle unit. The latest readings are taken for the actual take-off speed and/or the rotary speed of the twister (44). In at least one drive unit (6, 9) at the guides (42, 43), the processing module takes a dedicated and specific algorithm for the rotary angle and/or rotary speed of the twister nominal value and/or the nominal take-off speed to compute an internal nominal value for the angular setting and speed. The cycled delivery of synchronizing telegrams gives nominal value data to the drive bus (10) for the drive units (6, 9).