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MM-TA-12B Muting Module
Instruction Manual
Load
Conveyor
Figure B-8. A typical application for turret table inspection or operation station muting, using retroreflective photoelectric sensors
as muting devices.
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Turret Table Application
A "Turret Table" application is similar to the Robot Load/Unload Station muting
application, except that any movement of the table ends the mute. To accomplish
this, small retroreflective targets (or tape) are positioned so that they will initiate
the mute (the sensors must be set to "Light Operate") only after the table has fin-
ished indexing. (NOTE: The example shows four pairs of targets, one pair for
each position.) When the table begins indexing again, the polarized-retroreflective
photoelectrics immediately "lose sight" of the targets and end the mute. Since
the rotation of the table is the hazard, the size and positioning of the targets must
prevent muting while motion is taking place.
The top of the emitter and receiver are angled outwards to maintain proper sepa-
ration distance while preventing a pass-through hazard. Hard guarding, or other
safeguarding, must be positioned to prevent personnel from reaching through
and accessing any hazard.
Unload
Conveyor
Hard Guarding
Muting Sensors and Retroreflective
Targets at Different Heights and
Positions
Retroreflective
Targets at Each Position
to Initiate a Mute
Milling
and
Drilling
Operations
Load
Unload
Defined Area
Appendix B
M1
M2
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