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When designing head expanders or fixtures 3D Models are produced using the complete moving system to ensure that all resonances that might be excited are investigated. At least 20 mode types are usually considered. Head expanders are available as round or square shapes, made from cast magnesium or aluminium or as weldments, depending on the required size, operating frequency and budget.

Signal Force offers a selection of slip tables together with head expanders and fixtures to accommodate a wide range of applications that facilitate your vibration testing.

  • Monobases
  • Slip tables
  • Head Expanders
  • Fixtures
  • Noise Reduction Enclosures
  • Chamber Interfaces
  • Amplifiers
Head Expanders, Fixtures and Slip Tables

When designing head expanders or fixtures 3D Models are produced using the complete moving system to ensure that all resonances that might be excited are investigated. At least 20 mode types are usually considered. Head expanders are available as round or square shapes, made from cast magnesium or aluminium or as weldments, depending on the required size, operating frequency and budget.

Slip tables can be supplied in monobases or in stand-alone structures for mating with any existing shaker. The slip table assembly consists of a steel moat structure, a magnesium slip plate, a precision ground granite block and (usually) a set of guidance bearings. The steel moat acts as an oil reservoir, where oil flows from the slip plate and guidance assembly. The granite slip surface is enclosed within this structure and is ground and lapped to a tool room grade B finish to provide minimum friction during vibration testing. Data Physics Corporation manufactures a variety of head expanders, fixtures, and slip tables.

Chamber Interfaces

Signal Force shakers and integrated monobases are easily combined with climatic chambers for environmental stress screening applications (ESS). A range of thermal barriers is available using either phenolic type solid material or closed cell polyurethane foam types, depending on the required temperature range and the application. Chamber supports are standard for designs which require the chamber floor to be removed with the shaker. Shakers can be located below the chamber or removed for maintenance using a simple air-glide system.

Automatic load support ensures the shaker armature is always centralized when payload is added or removed. This ensures full displacement is always available, protects the suspension system from distortion and removes the need for operators to check armature position. Automatic temperature and vibration cycling re-moves the need for manual intervention during unattended testing periods.

  • Thermal barriers: Foam types, Solid types
  • Air glides
  • Automatic load support
  • Single contact control for shaker and vibration controller
  • Head expanders
  • Head extenders
  • Single axis and 3 axis systems

Amplifiers

Signal Force amplifiers, or shaker amplifiers, provide very high levels of efficiency with superior levels of performance. These amplifiers occupy little space and are suitable for driving shakers from all manufacturers, as well as other laboratory applications. While new shaker systems include matched amplifiers, Data Physics engineers can match our modern power amplifiers to any electrodynamic shaker.

EMC has been a major factor in the design of the digital switching amplifiers. Full use has been made of Faraday cages, compartmentalization, filtered interconnections, segmented wiring, common mode chokes for symmetrical currents, mains filters, optical coupling of signals and screened cables. All amplifiers are also available CE marked.

Linear amplifiers are available from 30 to 1000 VA and digital switching amplifiers are available from 1 kVA to 470 kVA. Switching amplifiers are used for medium and large shakers and are commonly replaced on very old shakers.

Switching Amplifier Features:

    • Up to 95% efficient
    • Switches at >105 kHz
    • 1 KVA, 5 KVA, and 10 KVA modules
    • Includes field and degaussing supplies
    • Safety interlocks
    • Protection against over current and over temperature
    • Remote and chamber interfaces
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
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