MD8207A Weld Hole Detector
Low Cost Weld Hole Detection Solution
The MD8207A Weld Hole detector is an exceptionally low-cost solution for detecting weld holes in strip for identifying the butt weld joint of adjoining strips. The hole can be as small as 6mm and pass at speeds of up to 300m/min. Where larger welding holes, then up to speeds of up to 600m/min.
The backlight is either a Quartz Lamp unit or extended IR Bar unit. A filter circuit ensure the Detector responds only to the “passing” illuminated hole and not to static background or reflected light source.
The MD8027A Detector has a field of view of up to 25° across the strip to enable it to accommodate various widths of product. Multiple Weld Hole Detectors can be mounted across the strip to accommodate strip wander.
Because the passing weld hole provides a pulsed output, an adjustable latching timer extenuates output for the plant PC to capture the output. The MD8027A has additional LED function that switches off a static light or IR source to facilitate straightforward alignment.
The Weld Hole Detector is the ideal replacement for multiple diode arrays or CCD Cameras as commonly used for detection of the weld hole and strip weld joint on the entry and exit to the accumulator in Cold Strip Mills and Coating Lines.
Multiple outputs are provided from the MD8207A Detector. Both PNP & NPN N/O transistor outputs are provided, as well as a reed-relay output. Connects to either 24VDC or 110/240VAC according to the model ordered.
The MD8207A incorporates a unique air coolant/purge facility. Should the ambient temperature be very high, then a water coolant chamber is available.
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Typical Applications:
- Cold Strip Mill Accumulator
- Coating Lines