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Automated Non-Destructive Quality Test System - NDT-AUTO

Resonant Inspection for High Volume Production Lines

Resonant Acoustic Method is designed to help deliver fully inspected parts, economically and on time.  Every component has a unique resonant signature or pattern that reflects its composition.  NDT-RAM™ detects deviations from the expected signature or pattern.  The NDT-AUTO System is perfect for applying efficient and reliable quality control testing to high volume production lines of powdered metal parts, castings and similar components.  The system stands alone and can be moved into any production line.  NDT-AUTO is fully automated, requiring no user intervention during testing, for efficient and cost effective 100% part testing.


  • Fast - Three seconds per part, typical*
  • Objective - ideal for in-line, automated, objective inspection
  • Unattended - no operator intervention needed for inspection
  • 100% Inspection - test every part prior to shipment
  • Customizable - conveyor configuration for a variety of parts


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Video of the fully automated NDT-AUTO system testing parts (00:44).

Product Included

  • NDT-RAM Criteria Setup Guide
  • NDT-RAM Software Manual
  • NDT-AUTO Hardware Manual
  • LanSharc™ Smart Digital Controller
  • Calibration Certificates
  • Industrial Sealed PC
  • Industrial Electric Impact Hammer and Cables
  • Acoustic Pickup and Microphone
  • Variable Speed Conveyor System
  • Aluminum Frame on Locking Caster for Mobility
  • Adjustable Photo Eyes
  • Programmable Logic Controller
  • Acoustic Chamber
  • Ejector Cylinder

Support Services

System Specifications


Part Throughput Rate 3 seconds per part, typical*
Part Types Component parts with high stiffness
Maximum Analysis Range 50 kHz
Minimum Analysis Range 500 Hz
Frequency Resolution 512 to 32,768
Analysis Modes Spectrum or Scaled
Available Criteria Ranges 20
Trigger Input Setting Input channel 1 or 2
Delay Processing Capability -50 to +200%
Data Logging Peak frequency and amplitude
Spectral Logging Toggle on/off
Digital Input Solid state relay, qty 4
Relay Setup via Software Normally open or normally closed
Relay Duration, Settable >0.1 seconds
Data Overlay Up to 1500 traces
PC Comm Configuration Includes internal Ethernet and/or serial
PC OS Windows XP, Vista or 7
*Part throughput rate dependent upon part size, belt size, data acquisition setup parameters, and other part handling requirements

Mechanical Specifications


Conveyor Belt Material Smooth Urethane, 95 durometer
Conveyor Belt Dimension (LxW) 6 feet x 8 inches; with other LxW available
Conveyor Belt Temperature Rating 215°
Maximum Belt Speed 1¾ inches per second
Height Adjustability Up to +/- 4 inches
Casters Lockable
PLC Direct logic
Encoder 60 ppr
Photoeyes NEMA4 transmit/receive
Ejector Cylinder Regulated, requires 60-90 psi air
Required Power AC, approximately 7 amps
Overall Dimension (LxWxH) 6 x 4 x 6 feet

An industrial electric impact hammer strikes parts traveling along a conveyor with a known and repeatable force, and a microphone measures the acoustic response from the part.  Input force and response spectra are measured by the controller, which digitizes the signal, and performs FFT analysis.  NDT software compares results against reference criteria limits and either rejects or accepts the part accordingly.

All of the NDT-RAM systems are ideal for 100% inspection requirements of manufacturers or users of powder metal, metal injection molded (MIM), castings (including ductile iron), forgings, stampings or welding. NDT-RAM provides screening for cracks, chips, holes, porosity, out-of-tolerance dimensions, variations in hardness, residual stress, bonding failures and heat-treating processes. Manufacturers that have significant inspection costs (either material or labor costs), produce or use safety-critical parts, have substantial scrap costs due to false rejects or simply want to improve their part quality can benefit from NDT-RAM technology.

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