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Siemens AG
Entry type: Application example Entry ID: 109477746, Entry date: 09/08/2021
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SINAMICS S120: Cross-cutter application with DCB extension

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  • Associated product(s)
For processes involving continuous material motion, to be able to cut products into defined lengths, it is important that the cutting unit is synchronized to the material motion during cutting. Further, between cutting operations, compensating motion must be executed between cutting steps, corresponding to the product length. This functionality was implemented in the cross-cutter application.

Task
Typically, a cross-cutter comprises a rotating roll equipped with a knife, which cuts a material web transverse to the direction of motion, generally in identically large sections (formats).

Solution
In order to allow various cut lengths (formats), the knife drive must have a motion profile, which during the cut moves the knife in synchronism with the belt – and outside the cutting range specifies suitable deceleration or acceleration rates before the velocity is synchronized again with the belt for the next cut. The saw is synchronized with the material using the position sensing function of an upstream feed drive or using a measuring wheel.

Possible Leading Value Sources

  • Speed Controlled Leading Axis
  • Measuring Wheel (e.g. Leading Value Encoder)
  • Leading Value Simulation

Functions

  • Real leading axis /measuring wheel
  • Virtual leading axis / test operation
  • Measuring wheel correction
  • Traversing to maintenance position
  • Single cut
  • Test cut
  • Continuous cutting
  • Cutting curve
  • Material thickness compensation
  • Autonomous speed in the cutting area
  • Overspeed in the cutting area
  • Multi-knife systems
  • Positioning Jogging
  • Print mark correction on the leading axis side
  • Flying homing for following axis and real leading axis
  • Homing for following axis and real leading axis
  • Dead time compensation

Additional Use-Cases

  • Perforating
  • Sealing or embossing
  • Cross Cutter with several knifes



For control of this application the SIMATIC library LMCSINA is available
To control the crosscutter application via S7-1200/1500 CPU, use the separate available SIMATIC S7 block 'LMCSINA_CrosscutterFB' 109479491


Further Converting Applications
An overview of all Converting Applications can be found here: 109744606


Additional Keywords
motioncontrol_apc_applications, rotierendes Messer, rotary knife, GMC-Bibliothek, GMC library, DCB Extension, DCB Crosscutter, DCB Querschneider 

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