155 Johnson Drive, Delaware, OH 43015 Voice 740-369-3580 Fax 740-369-2653 Non-Contact Measurement, Guiding and Detection Systems
|
|
|
|
Overview The SCAN-A-LINE™ Weld Hole Detection System (WHD System) has overcome the typical problems associated with classic hole detection systems by using a high speed scanning LED light source to scan wide areas of the strip and can detect holes near the center or holes punched near the edge of the strip. In the primary metals industry, coils of material are welded together to form a continuous strip. This facilitates product feeding into a continuous process, such as hot dip galvanizing or electroplating. Since the welds are ground smooth and are later plated over, they often become invisible to the operator. The physical properties of the welded materials vary greatly from that of the standard product. It is imperative that no material from the welded zone be supplied to the customer. For this reason, most manufacturers will punch marker holes in a predetermined position across the strip at the weld location. A hole detector is then used to locate the weld hole so that the weld may be removed from the coil at the end of the process line.
Single Sensor Standard Duty Weld Hole Detection System
The SCAN-A-LINE™ Weld Hole Detection System (WHD System) provides four relay outputs and indicator lamps on the Model HDPC Hole Detection Processing Computer Model HDPC for the weld hole detection and FAIL-SAFE. The time the indicator lamp remains lit is approximately one (1) second to permit a PLC or host computer time to see the signal. The Model HDPC supplies regulated power and full signal processing for one, two, or three SCAN-A-LINE™ Model 10XHD-Series sensors of the same type and size. A FAIL-SAFE circuit will monitor the sensor power circuits and scan rate. An indicator lamp and relay contact closure signal normal system operation. This prevents missed holes due to cut cables, sensor damage, power loss, or other system malfunctions.
The SCAN-A-LINE™ WHD System consists of Model HDPC Hole Detection Processing Computer, the Model 10XHD-Series emitter(s), Model 10XRHD-Series receiver(s) and all applicable cabling to connect the receiver with emitter and the emitter with the processing computer. The emitter-to-receiver cable length is 15' [4.4m] and the emitter-to-Processor cable length is 20' [6m]. All 10XHD-Series emitters and receivers are available in standard duty and Ultra-Tough enclosures. Contact your manufacturers representative or fill out the SCAN-A-LINE™ Information Request Form for quotation or our latest brochures.
ULTRA HIGH-SPEED WELD HOLE DETECTION
Features
Overview High-Speed processing of continuous strip coils in the primary metals industry requires ultra high-speed detection of weld marker holes. Weld marker holes are used to mark the junction of the coils welded together to form a continuous strip. It is imperative that no material from the welded zone be supplied to the customer. However, since the welds are ground smooth and plated (or coated) over, the welds often become invisible. For this reason, most manufacturers will punch marker holes at the weld location. A hole detector is then used to locate the marker weld hole. Over the years, many photo-electric sensors have been used to detect the weld marker holes. The difficulty with these simple detectors is their lack of reliability. If the strip tracks a little off center, the marker hole may pass unnoticed, outside the range of the sensor. Incandescent and fluorescent light sources may burn out without warning. Many of the older detectors are not fast enough for modern high-speed operations. More elaborate and expensive systems have evolved that employ multiple detectors and multiple holes to mask out false signals. Some systems employ high speed television cameras to detect holes. Many of these systems have proven to be unreliable and expensive. The faster lines operate, the more difficult hole detection becomes. Description The SCAN-A-LINE™ High-Speed Weld Hole Detection System (HSWHD System) consists of the Hole Detection Processing Unit - Model HDPU and the unique SCAN-A-LINE™ Model 10XHS-Series sensor set. The HSWHD System provides customer ready relay contact closures and indicator lamps in the Model HDPU to indicate weld hole detection. The time that the indicator lamp remains lit and the relay contact stays closed is customer adjustable from 0.05 seconds to 10.00 seconds. A fail-safe circuit monitors the sensor power circuits and scan rate. An indicator lamp and relay contact closure signal normal system operation. This prevents missed holes due to cut cables, damaged sensors or other system malfunctions. The SCAN-A-LINE™ HSWHD System is the most reliable and accurate solution for most high-speed weld hole detection applications on the market today. Contact your manufacturers representative or fill out the SCAN-A-LINE™ Information Request Form for quotation or our latest brochures. Features
Overview The SCAN-A-LINE™ Model SHD-4000-Series Small Hole Detectors provide reliable inspection of web materials for small holes. They meet requirements in the Rubber, Plastics, Paper and Metals industries, where conventional "Pin Hole" detectors are cost prohibitive, but hole defects of 0.062" [1.6mm] and larger can pose serious quality or production problems. The SHD-4000-Series Small Hole Detector(s) use Harris Instrument Corporation's patented Scanned-LED Technology combined with a 400 kHz. sample rate. Integrated with an advanced synchronous detector, the Model SHD-4000-Series provides reliable small hole detection with extraordinary rejection of ambient light interference. Hole defects can be detected to within 0.5" [13mm] of the strip edges without the use of mechanical shutters. Operation without moving mechanical shutters eliminates the need for most mechanical maintenance. The sensor system operates by edge counting to overcome difficulties with changing web positions and irregular strip widths. The Small Hole Detection System (SHD-4000 System) provides relay outputs and indicator lamps on the Model HDPC for the small hole detection and FAIL-SAFE. The time that the indicator lamp remains lit and the relay contact stays closed is approximately 1 second to permit a PLC or host computer time to see the signal. The Model HDPC supplies regulated power and full signal processing for one, two, or three SCAN-A-LINE™ SHD-4000-Series sensors of the same type and size. A fail-safe circuit will monitor the sensor power circuits and scan rate. An indicator lamp and relay contact closure signal normal system operation. This prevents missed holes due to cut cables, sensor damage, power loss and other system malfunctions. Operation The SHD-4000-Series Sensors use Harris Instrument Corporation's patented Scanned-LED technology to detect holes by counting product edges. This unique approach permits the inspection of web materials without the use of mechanical shutters or movable blinders, often necessary with other hole detector systems. As each scan is begun, a sync pulse is used to reset the edge counters in the Hole Detection Processing Unit - Model HDPC. When a strip is passing over the center of the Emitter, and leaves the LEDs on both ends un-obstructed, only two edges will be detected. The Model HDPC will alarm with more than two edges, the strip can be inspected for the presence of holes. When a wider web must be inspected, up to three sensors of the same size and type can be used to cover the complete width. In this configuration, the Model HDPC will automatically determine the operating mode and will alarm for more than one edge or any edges when the entire emitter is covered.
Description The SHD-4000-Series Sensors consist of a Scanned-LED Emitter and a Synchronous Detector Receiver. A 15' [4.4 m] cable is supplied for connecting the receiver to the emitter. A 20' [6.1 m] cable is provided for connecting the emitter to the Model HDPC Detection Processing Computer. Emitters are supplied in three lengths, 10", 20" and 30" (254mm, 508mm and 762mm). The Model SHD-4000-10E-B emitter has a scan time of 125 microseconds. Since the LED IR source scans at 80,000"/sec, longer emitters require greater scan times an in some cases multiple short emitters may be required to achieve required system performance on higher speed lines or lines with thicker materials. The emitters are housed in an extruded aluminum enclosure with a Lexan™ polycarbonate window. In normal operation, the synchronous receiver is placed in a position above the emitter where there is an unobstructed view of all of the emitter LEDs. The optimum separation distance for the emitter and receiver varies with the emitter size as shown in the previous table. The optimum product to emitter spacing (product passline), however, is fixed at 1" [25mm]. The best small hole sensitivity will be sacrificed at greater product passlines.
* Note - minimum hole size and distance from edge are dependent upon emitter length, line speed, strip thickness & other configuration factors.
Top View of overlapped SHD-4000-30E Sensors
Contact your manufacturers representative or fill out the SCAN-A-LINE™ Information Request Form for quotation or our latest brochures.
TRANSLUCENT HOLE DETECTION SYSTEM
Features
Overview The SCAN-A-LINE™ Translucent Hole Detection System (THD System) provides reliable inspection of translucent materials with optical density and color. Many strip and sheet products require the use of adhesive coatings, a hole in the base material can pose serious quality and production problems. The THD System utilizes Harris instrument Corporation's patented Scanned-LED Technology. Combined with a 200kHz sample rate, the THD System can readily detect holes down to 0.120" [3mm] in materials that have a 30% or more optical density. Hole Defects can be detected to within 1.0" [25.4mm] of the strip edge without the use of mechanical shutters. Operation without moving mechanical shutters eliminates the need for most mechanical maintenance. The THD System provides relay outputs and indicator lamps on the Model HDPC (Hole Detection Processing Computer) for the hole detection and FAIL-SAFE. The time that the indicator lamp remains lit is approximately one (1) second to permit a PLC or host computer time to see the signal. The Model HDPC supplies regulated power and full signal processing for single or dual SCAN-A-LINE™ Model 10XHD2000-Series sensors of the same type and size. A FAIL-SAFE circuit will monitor the sensor power circuits and scan rate. An indicator lamp and relay contact closure signal normal system operation. This prevents missed holes due to cut cables, sensor damage, power loss or other system malfunctions. Operation
The 10XHD2000-Series Sensors use Harris Instrument Corporation’s patented Scanned-LED technology to detect holes by counting product edges. This unique approach permits the inspection of web materials without the use of mechanical shutters or movable blinders, often necessary with other hole detector systems. As each scan begins, a sync pulse is used to reset the edge counters in the HDPC Detection Processing Computer. When a strip is passing over the center of the Emitter, and leaves the LEDs on both ends un-obstructed, only two edges will be detected. If more than two edges are detected, The Model HDPC will alarm for the presence of the holes. When a wider web must be inspected, up to two 10XHD2000-Series sensors of the same size and type can be used to cover the complete width. In this configuration, the Model HDPC will automatically determine the operating mode and will alarm for more than one edge or any edges when the entire Emitter is covered. Description The 10XHD2000-Series Sensor sets consist of a Scanned-LED Emitter and a Synchronous Detector Receiver. A 15' [4.4 m] cable is supplied for connecting the receiver to the emitter and a 20' [6.1 m] cable is provided for connecting the emitter to the Hole Detection Processing Computer – Model HDPC. Emitters are supplied in four lengths, 10" [254 mm], 20" [508 mm], 30" [762 mm], and 40” [1016mm]. The Model 10XHD-2000-10 emitter has a scan time of 0.0005 per second. Since the LED IR source scans at 2,000"/sec, longer emitters require greater scan times and in some cases multiple short emitters may be required to achieve required system performance on higher speed lines or lines with thicker materials. The emitters are housed in an extruded aluminum enclosure with a Lexan™ polycarbonate window. In normal operation, the synchronous receiver is placed in a position above the emitter where there is an unobstructed view of all of the emitter LEDs. The optimum separation distance for the emitter and receiver varies with the emitter size as shown in the following table. The optimum product to emitter spacing (product passline), however, is fixed at 1" [25mm]. Passline changes will effect minimum hole size and other performance variables.
Contact your manufacturers representative or fill out the SCAN-A-LINE™ Information Request Form for quotation or our latest brochures. Features
Overview The SCAN-A-LINE™ Dog Ear Detection System is designed to detect quality defects after splicing operations. It specifically looks for offsets in the edge condition of continuous web products. Spliced materials can include rubber, textiles, paper, film, and foils. The Model DEPU Dog Ear Detection Processing Unit can be used with an existing SCAN-A-LINE™ Width Measurement System or configured as a stand-alone system. Continuous video is analyzed from one or two SCAN-A-LINE™ sensors and compared to a user-defined threshold. When the threshold is crossed, the system alarms on the offset condition. The alarm lights the red DETECT lamp on the front panel. It also closes a normally open relay contact closure to signal the detection event. Both contact closure and lamp illumination are customer variable via an internal potentiometer for latch time. A second green front panel lamp indicates the FAIL-SAFE circuitry. The FAIL-SAFE circuitry monitors the sensor functions and system power to ensure proper operation. In the event of a system malfunction, it opens a normally closed relay contact and extinguishes the FAIL-SAFE lamp. Benefits
Configurations
Contact your manufacturers representative or fill out the SCAN-A-LINE™ Information Request Form for quotation or our latest brochures.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Send mail to webmaster
with questions or comments about this web site.
|
