Logika Technologies

WHD
WHD
WHD

WHD – Weld Hole Detector

Logika Technologies Weld Hold Detector, Model WHD, is primarily used in the metallurgical industry to detect punched holes close to welding seams in metal sheet production lines. These holes are purposely made so these weld seams may be later detected and cut out of the rolled product.

Logika Weld Hole Detector is comprised of an emitter and a receiver mounted above and below a steel sheet line. The emitter produces modulated infrared light that is collimated by a series of lenses. Normally, the steel sheet blocks all the light so that nothing reaches the receiver. Wherever a seam is welded in the steel plate, a hole is also punched to mark the seam. When the hole reaches the detect zone, the receiver will “see” the light through this hole and set an output.

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Applications

  • Cold Rolling

Features

  • IP66 Enclosure, designed for harsh environments
  • Easy installation with included mounting hardware
  • LED indicator: Green = “power on” / Red = “detection”
  • Fast Response time

Options

  • Single hole models with a detection width of 12” (304 mm), 16” (408 mm), or 20” (510 mm)
  • Double hole detection configuration available in 21” (527 mm) width
  • Junction Box
  • Adjustable Sensor/location Mounting
  • Custom length cables

Specifications

Temperature Range:
-25C to 70C (-13F to 158F)
Detection Range:
The length of the optical array is the same as the area scanned for weld holes. Single hole detection: 12” (304mm),16” (408mm),20” (510mm) Double hole detection: 21” (527mm).
Emitter:
Infrared LED, wavelength 870nm,100KHz pulse output
Receiver:
High speed receiver PIN tube with narrow band infrared filter, high immunity to light disturbance up to 10000 LUX
Max Sheet Speed:
For Φ12mm (0.47”) hole, maximum speed 600 m/min (1968 fpm)
Response Time:
PNP,NPN ≤1ms, Relay ≤ 20ms
Working Distance:
0.2-2.0M [7.9” – 79”] (hole size: Φ 12mm )[ 0.47”), 0.2-3.0M [7.9” – 118”] (hole size: Φ 20mm (0.79”))
LED Indicator:
Emitter : Green = power on, Red=emitter alarm
Receiver:
Red = detect, Yellow=sync alarm(On Alarm)
Output:
Relay contact (1NO,1NC) Contact capacity: AC250V 5A; DC 30V 5A PNP output: 24V@100mA, overload protection on detect NPN output: 24V@100mA , overload protection no detect
Output Hold time:
10ms-4s adjustable, clockwise extends holding time

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