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System calibration
NOTE: The functions described below 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 as detailed in
and alignment', page
12. The readhead will only enter calibration mode if the LED is flashing Green.
Step 1 – Incremental signal calibration
X
Move the readhead along the axis at slow speed (< 100 mm/s or less than the readhead maximum
speed, whichever is 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.
X
The system is now ready for reference mark phasing. For systems without a reference mark, cycle the
power to the readhead or connect the 'Remote CAL' output pin to 0 V for < 3 seconds to exit calibration
mode.
X
If the system does not automatically enter the reference mark phasing stage (LED continues single
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
X
Move the readhead back and forth over the selected reference mark until the LED stops flashing and
remains solid Blue (or Green if AGC is disabled). The reference mark is now phased.
X
The system automatically exits the calibration routine and is ready for operation.
X
AGC and AOC are automatically switched on once calibration is complete. To switch off AGC refer to
'Enabling/disabling AGC', page
14.
If the LED continues double‑flashing after repeatedly passing the chosen reference mark it is not
X
being detected.
- Ensure that the correct readhead configuration is being used. Readheads can either output all
reference marks or only output a reference mark where a reference selector magnet is fitted
depending on the options chosen when ordering.
- Check reference mark selector magnet is fitted in the correct location relative to readhead
orientation
('VIONiC readhead installation drawing', page
Calibration routine manual exit
X
To exit the calibration routine at any stage cycle the power to the readhead or connect the '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
VIONiC RSLM20/RELM20 installation guide
'Readhead mounting
4).
Settings stored
13
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