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Обзор
 ОбзорZ 702 supplementary board for winder drives The Z 702 supplementary board mainly contains the following functions Higher-level controller (tension, position, current) Diameter computer Speed controller This is therefore a variable-speed winder drive. The following setpoints act on the speed controller: 1. Master reference voltage VL determines the basic speed. 2. Signal n x d from the diameter computer takes into account the diameter change of the winder roll. 3. Signal BVset from the higher-level controller ensures that the web tension is maintained. 4. If necessary, a supplementary signal from a maneuvering potentiometer to run the winder motor when threading the material web. A DC tachometer coupled to the winder motor supplies the speed actual value. The winder motor speed is adapted over the complete winding range only via the armature voltage, at constant motor field. Thus a variable field supply is not needed. (i.e. = Full roll / Empty roll) Direct or indirect tension control can be provided for the higher-level controller. For direct tension control, the tension actual value is sensed via a tension transducer, and the tension setpoint is adjusted with a potentiometer. If, however, a compensator roll is provided, the controller operates as a position controller. The material web tension is governed solely by the weight of the compensator roll or its load. For indirect tension control, the armature current is a measure of the tension in the material web. The higher- level controller has the function of an additional current controller. For more detailed information, please refer to the Operating Instructions, Order No. E31910-J5035-X-A1. Z 707 supplementary board for EMF control The Z 707 supplementary board mainly consists of: a)Setpoint generator (V*) b)Two-quadrant voltage converter For more detailed information, please refer to the Operating Instructions, Order No. BA- 6RA82 22-1GB0. Z 708 analog, higher-level PID controller The Z 707 supplementary board is mounted on the SIMOREG K unit electronics board with spacers and is connected to it with a ribbon cable. Power is supplied to the voltage converter via two additional leads from the power board to the supplementary board (terminal points 13 - 15). A terminal strip is available for other connections. The mounting components, spacers and ribbon cable are supplied together with the board. Область примененияThe Z 702 supplementary board is intended for use with SIMOREG compact units for controlled drives for axle-driven winders and unwinders. Winders and unwinders always require that the material web have a specific tension. It is usually desirable for this tension, also known as “web tension”, to be adjustable and to have the required characteristics over the entire winding range. Winder drives can either be operated with “direct tension control” (sensing of the tension actual value via tension transducer or via compensator roll) or with “indirect tension control”. Both modes are possible with the Z 702 supplementary board. A prerequisite is that the web speed, the so-called “web velocity v” is always specified by the driven machine. The web velocity is either constant (e. g. for paper machines) or variable during acceleration and deceleration (e. g. for calenders). For winder operation, the winding roll speed must be reduced according to the increasing roll diameter; for unwinding operation, in contrast, the speed must be increased in accordance with the descreasing roll diameter. The set web tension must be maintained in both cases. Заказные данные
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