System Calibration; Restoring Factory Defaults - Renishaw TONiC DOP Installation Manual

System calibration

Calibration is an essential operation that completes readhead set-up,
with the optimum incremental and reference mark signal settings
stored in the readhead non-volatile memory.
Before system calibration, install the readhead to maximise
the signal strength throughout the axis travel.
NOTE: CAL routine maximum speed <100 mm/s
Step 1 – Incremental signal calibration
u Ensure Automatic Gain Control is switched off
(CAL LED on readhead is not illuminated)
before beginning calibration.
u Press and release the CAL button on the
end of the interface as shown.
The CAL LED will now periodically single-flash
u
to indicate that it is in incremental signal
calibration routine.
Move the axis at slow speed, ensuring you do not
u
pass the reference mark. The CAL LED will
double-flash periodically, indicating the incremental
signal is now calibrated and the new settings are
stored in the readhead memory.
u The system is now ready for reference mark phasing.
NOTE: For systems without a reference mark, go to 'Calibration routine - manual exit'
Step 2 – Reference mark phasing
Move the axis until the reference mark passes the readhead optical centre in any direction,
u
the CAL LED will continue to double flash periodically.
Move the readhead back over the selected reference mark; the CAL LED will stop flashing and
u
remain off. The reference mark is now phased.
u The system automatically exits the CAL routine and is ready for operation.
Calibration routine - manual exit
To exit the calibration routine at any time press and release the CAL button.
u
The CAL LED will stop flashing and remain off.
u
If step 1 is complete (CAL LED is periodically double-flashing) the incremental signal CAL settings
u
will be stored.
u Reference mark phasing settings will not be stored for CAL manual exit.
If the calibration routine has not been completed, restore factory defaults and then repeat the full
u
calibration.

Restoring factory defaults

When re-installing the system, or in the case of incomplete calibration, the factory defaults
should be restored.
To restore factory defaults;
u Switch system off.
u
Press and hold the CAL button whilst switching the system on. The CAL LED on the readhead
will flash several times, indicating that the factory defaults have been restored.
u
Release CAL button.
u Check the 'Readhead mounting/installation' and re-calibrate the system.
NOTE: System must be re-calibrated after restoring factory defaults.
Set-up LED
CAL button
NOTE: The LED on the interface will flash blank when the reference mark is detected
(<100 mm/s only). It indicates the presence of a reference mark not the phasing status.
Switching Automatic Gain Control on or off
AGC can be switched on or off via the DOP interface CAL push button switch.
Press and hold the CAL button on the interface for >3 seconds to switch AGC on or off.
u
The CAL LED on the readhead will be illuminated when AGC is active.
NOTE: The system must be calibrated before switching AGC on.
Txxxx Readhead LED diagnostics
LED Indication
Set-up
Green
Orange
Incremental
Red
*
Green (flash)
Reference mark Orange (flash)
Red (flash)
CAL On
Operating
Off
Single flashing
Calibration
Double flashing
Flashing at
Reset
power-up (<2s)
* Flash will effectively be invisible when incremental signal level is
DOP interface set-up LED diagnostics
Signal
Indication
Incremental Purple Normal setup; signal level 110% to 135%
Blue Optimum setup; signal level 90% top 110%
Green Normal set-up: signal level 70% to 90%
Orange Acceptable set-up; signal level 50% to 70%
Poor set-up; signal may be too low for reliable operation;
Red
signal level <50%
Purple / blank - flashing Over signal; system in error
Blue / blank - flashing Over speed; system in error
Red / blank - flashing Poor set-up; signal level <20%; system in error
Reference mark Blank flash Reference mark detected (speed <100mm/s only)
* -Alarm output will take the form of 3-state or line driven E signal depending on interface configuration.
Also, some configurations do not output overspeed alarm. See TONiC DOP Data Sheet (L-9517-9411) for details of interface configuration.
-Momentary status only, while fault condition remains.
-Alarm may result in axis position error, re-datum to continue.
Status
Normal set-up: signal level 70% to 135%
Acceptable set-up; signal level 50% to 70%
Poor set-up; signal may be too low for reliable operation; signal level <50%
Normal phasing
Acceptable phasing
Poor phasing; recalibrate
Automatic Gain Control – On
Automatic Gain Control – Off
Calibrating incremental signals
Calibrating reference mark
Restoring factory defaults
>70% when passing reference mark.
Status Alarm output*
No
No
No
No
No
Yes
Yes
Yes
No