I
NTRODUCTION
TO
THE
SD4840EK
SD4840EK User Manual
ADVANCED MICRO CONTROLS INC.
14
Indexer Functionality (continued)
Encoder Functionality (continued)
Stall Detection
When Stall Detection is enabled, the SD4840EK monitors the encoder for position changes, regardless of
whether or not a move is in progress. If the error between the encoder position and the motor position exceeds
forty-five degrees, the SD4840EK responds in the following manner:
The stall is reported in the network input data.
The motor position becomes invalid. (The machine must be homed or the motor position preset before
Absolute moves can be run again.
If a move was in progress, the move is stopped.
Note that a move does not have to be in progress for stall detection to be useful. By enabling stall detection,
the SD4840EK can notify the system if the motor shaft moves more than forty-five degrees while the motor
should be holding the load. For example, if the motor should hold a load against gravity, but the Idle Current
Reduction parameter is set to high, the SD4840EK will issue a stall detection error if the load begins to fall.
Encoder Registration Move
The encoder position acts as a registration mark in an Encoder Registration Move. Typically, the encoder is
mounted separately from the motor. With this mode, the SD4840EK will drive the motor until the desired
encoder count is reached, at which time the motor begins to decelerate and stop. This functionality is useful in
spool winding or unwinding applications, where the motor drives the spool and the encoder measures the
material length as it enters or exits the spool. As the spool diameter increases or decreases, the programmed
distance remains the same because you are measuring material, not the number of turns.
Electronic Gearing
In this mode, the stepper motor follows the rotation of an external encoder. This encoder is typically attached
to another motor. The ratio of encoder pulses to stepper pulses is programmable over a wide range. This mode
electronically couples the two motors together through a programmable gear ratio.
Содержание SD4840EK
Страница 1: ...MICRO CONTROLS INC ADVANCED U s e r M anual Manual 940 0S310...
Страница 6: ...TABLE OF CONTENTS SD4840EK User Manual ADVANCED MICRO CONTROLS INC 6 Notes...
Страница 38: ...MOVE PROFILES SD4840EK User Manual ADVANCED MICRO CONTROLS INC 38 Notes...
Страница 48: ...CALCULATING MOVE PROFILES SD4840EK User Manual ADVANCED MICRO CONTROLS INC 48 Notes...
Страница 78: ...COMMAND DATA FORMAT SD4840EK User Manual ADVANCED MICRO CONTROLS INC 78 Notes...
Страница 94: ...INSTALLING THE SD4840EK SD4840EK User Manual ADVANCED MICRO CONTROLS INC 94 Notes...
Страница 104: ...LEADERS IN ADVANCED CONTROL PRODUCTS ADVANCED MICRO CONTROLS INC...