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In a
stand-alone mode the indexer can operate independent of the
host computer. Once downloaded to the non-volatile memory
motion programs can be initiated from various types of
operator interfaces, such as a keypad or switch, or through
the auxiliary I/O inputs. A stand-alone stepper motor
control system is often packaged with a driver and/or power
supply and optional encoder feedback for "closed loop"
applications that require stall detection and exact motor
position compensation.
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