Omron F3SJ Series - Page 71

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F3SJ-A
User’s Manual
Chapter2 Muting System
System Configuration and Functions
E
 Reference: Preventing light interference of muting sensor
When a photoelectric sensor is used as a muting sensor, light interference may cause a muting error of F3SJ.
Light interference may occur due to:
(1) Interference between muting sensors
• Use sensors with mutual interference prevention (such as retro-reflective E3Z-R series)
• Use laser-type sensors (such as laser-type E3Z-LR series)
• Take distance from a sensor causing the interference
•
Displace beams for each other to prevent interference (change installation height or place them crosswise)
• Install a barrier
• Attach interference prevention filter (provided for E3Z series as accessories)
• Attach a slit to reduce light intensity (provided for E3Z series as accessories)
• Lower the sensitivity
•
Reduce a distance between a workpiece and a muting sensor to prevent reflected light from a workpiece
(2) Interference to a muting sensor from F3SJ
• Configure an operating range of F3SJ by the setting tool
• Take distance (D) from a sensor causing the interference
•
Displace beams for each other to prevent interference (change installation height or place them crosswise)
• Install a barrier
• Arrange sensors in alternation
• Lower the sensitivity
(3) Interference from a muting sensor to F3SJ
• Use a red LED type sensor (such as retro-reflective E3Z-R series)
• Use laser-type sensors (such as laser-type E3Z-LR series)
• Take distance (D) from a sensor causing the interference
•
Displace beams for each other to prevent interference (change installation height or place them crosswise)
• Install a barrier
• Arrange sensors in alternation
• Attach a slit to reduce light intensity (provided for E3Z series as accessories)
Mutual interference between a muting sensor and F3SJ in (2) and (3) above can be prevented by
configuring D satisfying a formula shown below:
• If L = 0.2 to 3m D = 0.26m or larger
• If L = 3m or larger D = L x tan5° = L x 0.088m or larger
L : Distance between an emitter and a receiver of F3SJ
D : Distance between a muting sensor and F3SJ
F3SJ B2A2A1 B1 A1 B1 A2 B2 A1 B1 A2 B2
F3SJ F3SJ
D
WorkpieceWorkpieceWorkpiece
Reflected light Direct light Light from other F3SJ
L
(1)
(1)
(1)
(1)
(3)
(2)