Product Information

Image processing unit and Image inspection equipment

TH-1400PC

Optical fiber type Pinhole detector
Computerized pinhole inspection with a variety of sorting ways

TH-1400PC
Overview
  • TH-1400PC optically detects a pinhole on an opaque sheet-like material such as aluminum foil, copper foil, copper sheet, or steel sheet with a high degree of accuracy using a fluorescent lamp, an optical fiber and a photomultiplier.
  • The faint fluorescent light from a pinhole of sheet material passes through an optical fiber and then detected by a highly sensitive photomultiplier.
  • Possible to detect a 20μm pinhole reliably. 
  • Pinholes are variously classified according to size, density, continuity of pinhole distribution, appearance periodicity, and elongate pinhole length.
  • Model TH-1400PCA has the automatic edge tracing mechanism, thereby a stable detection is achieved even if a sheet material yaws.
Features
  • A 20μm pinhole can be detected reliably on the 1.500 m/min high-speed line.
  • Detection sensitivity stays unchanged against the line speed variation.
  • Variation of detection sensitivity in the sheet width direction is very small as a pinhole is detected using the optical fiber bundle.
  • It can respond to up to 10-times diameter change thanks to the wide dynamic range.
  • Possible to print out inspection data, to save data and to connect with host computer for central control.
  • Equipped with database function.
Models
  • TH-1400PCH with Manual edge mask
    Light source   TH-65FA
    Light receiver  TH-1400HR
    Controller     TH-1400C
  • TH-1400PCA with Automatic edge tracing edge mask
    Light source   TH-65FA
    Light receiver  TH-1400AR
    Controller     TH-1400C
Applications

Pinhole detection of :

  • Aluminum foil
  • Copper foil
  • Steel sheet
  • Rubber sheet
  • Other various opaque sheets
Detection signal waveform

Detection principle

  1. A little light coming through a pinhole on the sheet is conducted to the photomultiplier tube through optical fiber.
  2. This little light is converted into an electrical signal and amplified by the photomultiplier.
  3. The amplified electrical signal is processed in various ways and a relay contact signal is output after sorting a pinhole by size.
  4. It is possible to connect a printer at the user’s option.
Specifications
Basic performance
Inspection object Opaque sheet
Inspection width 500 to 1,380mm
Thickness of object 1.2mm or less
Line speed Max 1,500m/min
Acceptable pitch ±1mm
Acceptable yaw ±2mm
Inspection area Whole area excluding 10mm dead zone at both edges
Detection performance A pinhole 20µm in diameter or larger
Light source
Lighting system

High frequency fluorescent lamp

(20kHz – 30kHz, white)
Power supply Supplied from inverter
Setting distance Distance to object: 40mm
Light receiver
Light collection system Light collection by optical fiber
Photoelectric transducer Photomultiplier tube
Setting distance Distance to object: 1.5～2mm
Controller
Output
  1. Relay output (a-contact)
    • Detection output (timer output)
      ON time: 0.5sec±30%
    • Sheet absence alarm
  2. Electronic buzzer alarm (timer output)
    • Operating time: About 1 sec (with ON/OFF switch)
Operation power source AC100V±10% 50/60Hz
Power consumption Approx. 300VA
Automatic edge tracing mechanism (TH-1400PCA)
Moving speed 4mm/sec or less
Open-close range 400-1,400mm
Setting accuracy ±1 mm
Drive source Servomotor
Control system Sequencer control
Outline dimension 800 (W) × 700 (H) × 250 (D)(mm)

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