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Hoist / Drum: Improved operating reliability and positioning accuracy at the ladle crane

Fundamentally improve the operating reliability and positioning accuracy of the ladle crane hoist used in steel production. Installation of the modular universal encoder system U-ONE, which offers the following special characteristics • Basic unit mounted directly at the hoist drum by using a double joint coupling on a tailor-made base plate construction • Signal transmission via fiber optic cable prevents EMC problems

Home  Case Studies Hoist /Drum: Improved operating reliability and positioning accuracy at the ladle crane

Hoist / Drum: Improved operating reliability and positioning accuracy at the ladle crane

Home    Case Studies    Pilger mill in tube rolling mills – hot and cold pipe detection

Pilger mill in tube rolling mills - hot and cold pipe detection

  • Reliable braking when overspeed is detected
  • Precise switching of hoist positions
  • Configure parameters quickly and easily
  • Preset shortens downtimes after rope change

Before: Hoist drum with mechanical rotary cam limit switch, but without overspeed detection. Bottom right, the new holding brake.

Task

Fundamentally improve the operating reliability and positioning
accuracy of the ladle crane hoist used in steel production by
implementing the following measures:
      • Replacement of the existing mechanical cam limitswitch with an electronic                      position switch that ensures significantly higher accuracy
      • Additional implementation of an electronic overspeed switch to realize overspeed            detection as well as an emergency break

After: Hoist drum with U-ONE basic unit and holding brake. The photo right shows the U-ONE electronic modules in the switchboard

Solution

Installation of the modular universal encoder system U-ONE, which offers the following special characteristics:
• Basic unit mounted directly at the hoist drum by using a double joint coupling on a tailor-made base plate construction
• Signal transmission via fiber optic cable prevents EMC problems
• The following electronic modules were installed, well-protected in the switchboard:
   • FOC decoder
   • Electronic position switch (ERC) with 6 relay outputs and preset input to facilitate             plant adjustments
   • Electronic overspeed switch (EGS) with 2 relay outputs and
     integrated system check function

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