India
Web tension controller DC 60/61
Web tension controller DC 60/61
Electric drives for unwinders and rewinder
Electric drives for transport drives
- Electric drives for unwinders and rewinder
- Electric drives for transport drives
- Electric and pneumatic brakes for unwinders
- Mechanical variable drives and superimposed gear drives for transport drives
Control structure for unwinder with motorized drive
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the PID controller. The PID controller forms the speed correction signal
± delta v which is then added to the web speed signal v-web target. The v-web target corresponds to the v-web target of the main drive.
For unwinders the superimposed speed target value is divided by the actual batch diameter. The result is a superimposed speed target value for the speed-controlled unwinder.
- Diameter calculator or connection for diameter sensor
- Speed target value for unwinder
- Winder characteristics F=f (D)
Control structure for winder with motorized drive
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the PID controller. The PID controller forms the speed correction signal
± delta v which is then added to the web speed signal v-web target. The v-web target corresponds to the v-web target of the main drive.
For unwinders the superimposed speed target value is divided by the actual batch diameter. The result is a superimposed speed target value for the speed-controlled unwinder.
- Diameter calculator or connection for diameter sensor
- Speed target value for winder
- Winder characteristics F=f (D)
Control structure for motorized transport drive
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the PID controller. The PID controller forms the speed correction signal
± delta which is then added to the web speed signal. This signal is transmitted to the following drive.
- Speed target value for transport drive
Control structure for unwinder with pneumatic brake
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the PID controller. The PID controller forms positioning signal for the following U/P converer The converter supplies a proportional positioning signal at the output to trigger a pneumatic brake.
- Diameter calculator or connection for diameter sensor
- Mass moment of inertia for quick stop
- Brake caliper rotation
- Moment target value for unwinder
Control structure for unwinder with electric brake
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the PID controller. The PID controller forms positioning signal for the following U/I converer The converter supplies a proportional positioning signal at the output to trigger an electric brake.
- Moment target value for unwinder
Control structure for transport drive with variable positioning gear
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the three-position controller. Besides the analog speed target value two binary outputs for right and left run are available as positioning signals .The two binary outputs are used for contactor controls.
- Three-position controller with adjustable window width and hysteresis
- Optionally with analog speed target value for frequency converters
Control structure for transport drive with superimposed gear
Two load sensors measure the web tension actual value of the running web. This is compared to the web tension target value and transferred as system deviation to the tweb tension controller.
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