WORLD-BEAM QS18 Adjustable-Field Sensors

Transcription

1 DJUTBL-FLD (some models) WORLD-BM Q8 djustable- ensors Miniature sensors with visible red LD or visible red laser Models Features xceptional optical performance, comparable to larger sensors imple multi-turn screw adjustment of cutoff distance 0 to 30V dc operation, with complementary (PDT) P or PP outputs, depending on model Less than millisecond output response for excellent sensing repeatability Laser Models: arrow effective beam (approx. mm spot size) for small-object detection and precise position control rosstalk rejection algorithm to avoid optical disturbance from adjacent sensors lass models have reduced excess gain within 0 mm of sensor for decreased susceptibility to the effects of lens contamination and to allow use of external lens shield. Models ensing Beam and Range able* upply Voltage Output Type xcess Gain Performance based on 90% reflectance white test card Q8V6F00 Q8VP6F nm Visible Red LD Range: mm (0) to cutoff point djustable cutoff point, 0-00 mm (0.8"-) P PP G mm Gain at 0 mm utoff 0 mm 00 mm DT Q8..F mm G Gain at 00 mm utoff mm 0 mm 00 mm DT Q8..F mm Q8V6LF Q8VP6LF 650 nm Visible Red lass Laser Range: mm (0) to cutoff point djustable cutoff point, mm (."-6") m (6.5') -wire 0 to 30V dc P PP G 0 mm Gain at 30 mm utoff 0 mm 00 mm DT Q8..LF 000 mm G Gain at 50 mm utoff mm 0 mm 00 mm DT Q8..LF 000 mm Gain at 50 mm utoff Gain at 50 mm utoff Q8V6LF50 Q8VP6LF nm Visible Red lass Laser Range: 0 mm (0.8") to cutoff point djustable cutoff point, mm ("-0") P PP G 0 mm 0 mm 00 mm DT Q8..LF mm G 0 mm 0 mm 00 mm DT Q8..LF mm * Only standard m (6.5') cable models are listed above. For other cable/connector options: 9 m (30') cables: add suffix W/30 to the model number (e.g., Q8V6F00 W/30). -pin Pico-style pigtail QD: add suffix Q to the model number (e.g., Q8V6F00Q); accessory mating cordset required, see page 7. -pin uro-style pigtail QD: add suffix Q5 to the model number (e.g., Q8V6F00Q5); accessory mating cordset required, see page 7. learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

2 WORLD-BM Q8 djustable- ensors Overview The Q8 djustable sensor is a full-featured sensor in a miniature package. t provides background suppression sensing capability for small or difficult-to-reach areas. Models are available with a visible red LD sensing beam, or one of two visible red lasers (see Models table on page ). These adjustable-field sensors are able to detect objects of relatively low reflectivity, while ignoring other objects in the background (beyond the cutoff point). The cutoff distance is mechanically adjustable, using the 5-turn adjustment screw on the sensor top (Figure ). s and background objects must always be placed beyond the cutoff distance. djustable- ensing Theory of Operation The sensor compares the reflections of its emitted light beam () from an object back to the sensor s two differently-aimed detectors R and (see Figure ). f the near detector (R) light signal is stronger than the far detector () light signal (see object, closer than the cutoff distance), the sensor responds to the object. f the far detector () light signal is stronger than the near detector (R) light signal (see object B, object beyond the cutoff distance), the sensor ignores the object. The cutoff distance for these sensors is adjustable. Objects lying beyond the cutoff distance are ignored, even if they are highly reflective. However, it is possible to falsely detect a background object, under certain conditions (see Reflectivity and Placement). n the drawings and discussion on these pages, the letters, R, and identify how the sensor s three optical elements (mitter, ear Detector R, and Far Detector ) line up across the face of the sensor. The location of these elements defines the sensing axis (see Figure 3). The sensing axis becomes important in certain situations, such as those illustrated in Figures 7 and 8. Green: Power ndicator Flashes for Output Overload Figure. ensor features ear Detector Far Detector Yellow: Light ensed ndicator (Flashes for Low Gain onditions) Receiver lements R utoff Point djustment crew Lenses Object utoff Object B or ensor etup etting the utoff The cutoff distance for the Q8F models may be adjusted between 0 mm and 00 mm (0.8" to ); for Q8LF models, between 30 mm and 50 mm (." to 6"); and for Q8LF50 models, between 50 mm and 50 mm (" to 0"). To properly set the cutoff point, position the lightest possible background to be used, at the closest position it will come to the sensor during use. Using a small screwdriver in the adjustment screw, adjust the cutoff distance until the threshold is reached and the yellow Light ensed indicator changes state. (f the indicator never comes O, the background is beyond the maximum sensing distance and will be ignored.) Repeat the procedure, using the darkest target, placed in its most distant position for sensing. djust the cutoff approximately midway between the two positions (Figure ). ensing Reliability For highest sensitivity, the sensor-to-object dis tance should be such that the object will be sensed at or near the point of maximum excess gain. The excess gain curves on page show excess gain vs. sensing distance for the minimum and maximum cutoff settings. Maximum excess gain for model Q8V6F00 at a 0 mm cutoff occurs at a lens-to-object distance of about 7 mm, for example. The background must be placed beyond the cutoff distance; more reflective backgrounds should be placed even farther back. Following these two guidelines will maximize sensing reliability. Figure. djustable field sensing concept Receiver lements mitter Figure 3. The sensing axis ensing Range ensing xis When an object approaches from the side, the most reliable sensing usually occurs when the line of approach is parallel to the sensing axis. learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

3 WORLD-BM Q8 djustable- ensors R Target utoff Figure. et cutoff distance approximately midway between the farthest target and the closest background Reflectivity and Placement void mirror-like backgrounds that produce specular reflections. False sensor re sponse will occur if a back ground surface reflects the sensor s light more strongly to the near detector (R) than to the far detector (). The result is a false O condition (Figure 5). Use of a diffusely-reflective (matte) background will cure this problem. Other possible solutions are to angle either the sensor or the background (in any plane) so that the back ground does not reflect light back to the sensor (see Figure 6). Position the background as far beyond the cutoff distance as possible. n object beyond the cutoff distance, either stationary (when po si tioned as shown in Figure 7) or if it moves past the face of the sensor in a direction perpendicular to the sensing axis, can cause unwanted triggering of the sensor if it reflects more light to the near detector than to the far detector. The problem is easily rem e died by rotating the sensor 90 (Figure 8). The object then reflects the R and fields equally, resulting in no false triggering. better solution, if possible, may be to reposition the object or the sensor. ensing utoff ensing utoff R ore of mitted Beam = mitter R = ear Detector = Far Detector trong Direct Reflection to R Reflective R ore of mitted Beam trong Direct Reflection way From ensor = mitter R = ear Detector = Far Detector Reflective Figure 5. Reflective background problem Figure 6. Reflective background solution utoff R R,, ensing ensing reflective background object in this position or moving across the sensor face in this axis and direction may cause false sensor response. Figure 7. Object beyond cutoff problem reflective background object in this position or moving across the sensor face in this axis will be ignored. Figure 8. Object beyond cutoff solution learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

4 WORLD-BM Q8 djustable- ensors olor ensitivity The effects of object reflectivity on cutoff distance, though small, may be im por tant for some ap pli ca tions. The excess gain curves on page were generated using a white test card of 90% reflectance. Objects with reflectivity of less than 90% reflect less light back to the sensor, and thus require pro por tion ate ly more excess gain in order to be sensed with the same reliability as more reflective objects. When sens ing an object of very low reflectivity, it may be especially im portant to sense it at or near the distance of maximum excess gain. t is expected that at any given cutoff setting, the actual cutoff distance for lower reflectance targets will be slightly shorter than for higher reflectance targets (see Figures 9, 0, and ). This behavior is known as color sensitivity. n the graphs below, the percentage of deviation indicates a change in the cutoff point for either 8% gray or 6% black targets, relative to the cutoff point set for a 90% reflectance white test card. For example, in Figure 9, the cutoff point decreases 0% for a 6% reflectance black target when the cutoff point is adjusted for 00 mm () using a 90% reflectance white test card. n other words, the cutoff point for the black target is 90 mm (3.6") for this setting Percent Deviation - -6 Percent Deviation % Gray ard 6% Black ard -6 8% Gray ard 6% Black ard utoff etting in mm (90% White ard) utoff etting in mm (90% White ard) Figure 9. Q8F cutoff point deviation Figure 0. Q8LF cutoff point deviation 0 - Percent Deviation % Gray ard 6% Black ard utoff etting in mm (90% White ard) Figure. Q8LF50 cutoff point deviation learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

5 WORLD-BM Q8 djustable- ensors upply Voltage pecifications Q8F Models Q8LF Models Q8LF50 Models 0 to 30V dc (0% maximum ripple) at less than 5 m, exclusive of load; Protected against reverse polarity and transient voltages 0 to 30V dc (0% maximum ripple) at less than 5 m, exclusive of load; Protected against reverse polarity and transient voltages ensing Beam Visible red LD, 660 nm Visible red laser (see below) Laser haracteristics / Wavelength: 650 nm visible red lass laser Pulse Width: 7 microseconds Rep Rate: 30 microseconds verage Output Power: mw Output onfiguration olid-state complementary (PDT); P or PP (current sinking or sourcing), depending on model; Rating: 00 m maximum each output at 5 Off-state leakage current: less than 50 30V dc O-state saturation voltage: less than 0 m; less 00 m Protected against false pulse on powerup and continuous overload or short circuit of outputs Output Response 700 microseconds O/OFF; 00 ms delay on power-up; outputs do not conduct during this time Wavelength: 658 nm visible red lass laser Pulse Width: 7 microseconds Rep Rate: 30 microseconds verage Output Power: 0. mw olid-state complementary (PDT); P or PP (current sinking or sourcing), depending on model; Rating: 00 m maximum each output at 5 Off-state leakage current: P: less than 00 30V dc (ee pplication ote ) PP: less than 0 30V dc O-state saturation voltage: P: less 00 m PP: less than 00 m Protected against false pulse on power-up and continuous overload or short circuit of outputs 700 microseconds O/OFF; 00 ms delay on power-up; outputs do not conduct during this time Repeatability 75 microseconds 30 microseconds ensing Hysteresis 0.5% of range typical at 0 mm cutoff % of range typical at 50 mm cutoff 3% of range typical at 00 mm cutoff % of range typical at 30 mm cutoff % of range typical at 75 mm cutoff 5% of range typical at 50 mm cutoff djustments ndicators % of range typical at 50 mm cutoff % of range typical at 50 mm cutoff 5% of range typical at 50 mm cutoff Five-turn adjustment screw sets cutoff distance between min. and max. positions, clutched at both ends of travel LD indicators on sensor top: Green O steady: Power O Yellow O steady: Light sensed Yellow flashing: Marginal excess gain ( to.5x excess gain) onstruction B housing, acrylic lens cover;.5 mm and 3 mm mounting hardware included nvironmental Rating P67; M 6; UL Type onnections m (6.5') -wire PV cable, 9 m (30') PV cable, or -pin Pico-style or uro-style 50 mm (6") pigtail QD, depending on model Operating onditions Temp: 0 to +55 (+3 to 3 F) Temp: 0 to +50 (+ to F) Relative Humidity: 50 (non-condensing) Laser lassification / lass laser product lass laser product omplies with 6085-:00 and FR 00.0, except for deviations pursuant to Laser otice 50, dated pplication otes. P off-state leakage current is < 00 μ for load resistances > 3 kω or optically isolated loads. For load current of 00 m, leakage is < % of load current ertifications approval in process learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

6 WORLD-BM Q8 djustable- ensors Description of Laser lasses lass Lasers Lasers that are safe under reasonably foreseeable conditions of operation, including the use of optical instruments for intrabeam viewing. Reference 6085-:00, section 8.. lass Laser haracteristics: ee specifications on page 5. lass Lasers Lasers that emit visible radiation in the wavelength range from 00 nm to 700 nm, where eye protection is normally afforded by aversion responses, including the blink reflex. This reaction may be expected to provide adequate protection under reasonably foreseeable conditions of operation, including the use of optical instruments for intrabeam viewing. Reference 6085-:00, section 8.. lass Laser haracteristics: ee specifications on page 5. For afe Laser Use (lass or lass ): Do not permit a person to stare at the laser from within the beam. Do not point the laser at a person s eye at close range. Terminate the beam emitted by a lass laser product at the end of its useful path. Locate open laser beam paths either above or below eye level, where practical. UTO... Do ot Disassemble for Repair Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Do OT attempt to disassemble this sensor for repair. defective unit must be returned to the manufacturer. Dimensions 5.5 mm (0.") Q8F 6.5 mm (0.6") Q8LF and Q8LF mm (0.30") 7.5 mm (0.30") 5.0 mm (0.59") 3.8 mm (0.5").0 mm (0.83") 5. mm (0.0") 3.0 mm (0.") 9.0 mm (0.35") 5.0 mm (0.59") 3.8 mm (0.5").0 mm (0.87") 5. mm (0.0") 3.0 mm (0.") 9.0 mm (0.35") 3.5 mm (.36"). mm (0.95").0 mm (0.7") 3. mm (0.9") 3.5 mm (.36"). mm (0.95").0 mm (0.7") 3.8 mm (0.5") 3. mm (0.53") M3 Hardware ncluded* *M3 Hardware for idemount M.5 Hardware for Mounting to Threaded nserts M.5 Hardware ncluded* 7.5 mm (0.30").8 mm (0.9") 3. mm (0.53") M3 Hardware ncluded* *M3 Hardware for idemount M.5 Hardware for Mounting to Threaded nserts M.5 Hardware ncluded* () M3 x 0.5 x 0 mm ss screw () M3 x 0.5 ss hex nut () M3 ss washer () M.5 x 0.5 x 5 mm ss screw () M.5 ss washer () M3 x 0.5 x 0 mm ss screw () M3 x 0.5 ss hex nut () M3 ss washer () M.5 x 0.5 x 5 mm ss screw () M.5 ss washer learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com

7 WORLD-BM Q8 djustable- ensors Hookups P (inking) Outputs PP (ourcing) Outputs V dc V dc Quick-Disconnect (QD) ordsets tyle Model Length Used with: Dimensions Pinout -Pin Pico-style traight, nap-on onnector PKG- m (6.5') Q8 with Q suffix 3. mm max. ø 8. mm max. 3 = Brown = White 3 = Blue = Black -Pin uro-style traight, Threaded onnector MQD-06 MQD-5 MQD-30 m (6.5') 5 m (5') 9 m (30') Q8 with Q5 suffix mm max. ø 5 mm M x 3 = Brown = White 3 = Blue = Black Mounting Brackets MBQ8 ickel-plated die-cast zinc Wrap-around bracket MBQ8YL Heavy-duty die-cast bracket designed for industrial protection Replaceable window For use with lass laser (adjustable-field) models only MBQ8F ga., 30 stainless steel Right-angle mounting bracket learwater Tech - Phone: Fax: Web: - mail: info@clrwtr.com