System Calibration; Restoring Factory Defaults; Enabling/Disabling Agc; Readhead Led Diagnostics - Renishaw ATOM DX Series Installation Manual

System calibration

NOTE: System calibration (CAL), restoring factory defaults and enabling/disabling AGC functions
can also be carried out using the optional ADTi-100 and ADT View software.
See www.renishaw.com /adt for more information.
Ensure signal strength has been optimised along the full axis of travel; the LED will be flashing Green.
Cycle the power to the readhead or connect the 'Remote CAL' output pin to 0 V for <3 seconds.
The readhead will then single flash Blue to indicate it is in calibration mode. The readhead will only enter
calibration mode if the LED is flashing Green.
Step 1 – Incremental signal calibration
Move the readhead at slow speed (<100 mm/s or less than the readhead maximum speed, whichever is
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slowest), ensuring it does not pass a reference mark, until the LED starts double-flashing indicating the
incremental signals are now calibrated and the new settings are stored in the readhead memory.
The system is now ready for reference mark phasing. For systems without a reference mark, cycle
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the power to the readhead or connect the 'Remote CAL' output pin to 0 V for <3 seconds to exit
calibration mode.
If the system does not automatically enter the reference mark phasing stage (LED continues single
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flashing) the calibration of the incremental signals has failed. After ensuring failure is not due to
overspeed (>100 mm/s or exceeding the readhead maximum speed), exit the calibration routine,
restore factory defaults as detailed below and check the readhead installation and system cleanliness
before repeating the calibration routine.
Step 2 – Reference mark phasing
Move the readhead back and forth over the chosen reference mark until the LED stops flashing and
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remains solid Blue. The reference mark is now phased.
The system automatically exits the calibration routine and is ready for operation.
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AGC is automatically switched on once calibration is complete. To switch off AGC refer to the
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'Enabling/disabling AGC' section.
If the LED continues double-flashing after repeatedly passing the chosen reference mark it is not
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being detected.
- Ensure that the readhead orientation and lateral offset are correct.
Calibration routine manual exit
To exit the calibration routine at any stage cycle the power to the readhead or connect the
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'Remote CAL' output pin to 0 V for <3 seconds. The LED will then stop flashing.
LED
Blue single flashing None, restore factory defaults and recalibrate
Blue double flashing Incremental only
Blue (auto-complete) Incremental and reference mark
ATOM DX
linear installation guide
Settings stored

Restoring factory defaults

When re-installing the system, or in the case of continued calibration failure, factory defaults should be restored.
To restore factory defaults:
Switch system off.
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Obscure the readhead optical window or connect the 'Remote CAL' output pin to 0 V.
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Power the readhead.
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Remove the obstruction or, if using, the connection from the 'Remote CAL' output pin to 0 V.
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The LED will start continuously flashing indicating factory defaults have been restored and the readhead is
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in installation mode (flashing set-up LED).
Repeat 'Readhead set-up' procedure.
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Enabling/ disabling AGC
The AGC is automatically enabled once the system has been calibrated (indicated by a Blue LED). AGC can be
manually switched off by connecting the 'Remote CAL' output pin to 0 V for >3 seconds <10 seconds. The LED
will then be solid Green.

Readhead LED diagnostics

Mode LED
Installation mode
Green flashing
Orange flashing
Red flashing
Calibration mode
Blue single flashing
Blue double flashing
Normal operation Blue
Green
Red
Blank flash
Alarm 4 red flashes
Status
Good set-up, maximise flash rate for optimum set-up
Poor set-up, adjust readhead to obtain Green flashing LED
Poor set-up, adjust readhead to obtain Green flashing LED
Calibrating incremental signals
Calibrating reference mark
AGC on, optimum set-up,
AGC off, optimum set-up,
Poor set-up; signal may be too low for reliable operation
Reference mark detected (visible indication at speed <100mm/s only)
Low signal or over signal; system in error
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