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Non-Safety Light Screen Systems FAQs
MINI-ARRAY™
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Q: Why is the MINI-ARRAY not generally used for low contrast applications? |
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The simple answer is that there is a wide variation in signal strength between optical channels. These variations are strongly due to the fact that it is impossible to have the same optical alignment for all channels. In other words, some receivers detect more light than other receivers. Another source of variation between optical signal strength is the variation in optical component performance. These two common sources of variation (optical alignment and component performance) cause individual channel strengths to vary by up to a factor of five. With such wide variations, low contrast applications become difficult.
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Q: Does Banner have a visible red MINI-ARRAY emitter? |
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Yes, we can provide a visible red emitter but the applications are limited. These sensors have a short range (three feet maximum), but they have been successfully implemented for some applications where the visible light provides greater contrast over the infrared light.
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Q: How far can the emitter and receiver be separated from the MAC controller? |
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Banner has a broad range of cable lengths from 15 to 150 feet. The standard cables are the QDC-515C through the MAQDC-5150C.
Non-Safety Light Screen Systems FAQs
High-Resolution MINI-ARRAY™
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Q: Why does the High-Resolution MINI-ARRAY need to go through the alignment procedure, and how often do we need to implement the alignment procedure? |
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The alignment procedure causes the light curtain to adjust the sensor gain such that all light channels produce electrical signals within an acceptable span. These values are then used as references for individually adjusting blocked conditions. Since each channel has a unique blocked threshold value, the alignment procedure should be performed every time the sensor is mechanically moved. However if the light curtain is not moved, then typically the sensor should not need to go through the alignment procedure.
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Q: How do I select the appropriate measurement mode analysis mode for my application? |
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Many unique applications can be solved by selecting the appropriate measurement mode. Specifically the user should first review each measurement mode function. Then the user would define which measurement mode best describes the information needed to solve the application. For additional help in selecting the appropriate measurement modes, specific applications can be reviewed with a Banner technical representative.
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Q: Is web center guiding a good application for the HRMA? |
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Both the MINI-ARRAY and HRMA can be used in center guiding applications. For the HRMA, the user would use the MBB measurement mode. This measurement mode will measure the first and last beam blocked and then average these values to produce the center of a single object. The MBB value can then be used with an analog output for the center guiding application.
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For answers to your non-safety light screen system questions, contact a Banner Applications Engineer:
e-mail: sensors@bannerengineering.com
on-line request form page
telephone: 1-800-809-7043 |
