Renishaw QUANTiC RTLC40 Installation Manual page 18

Troubleshooting
(continued)
Fault
No reference mark output
Reference mark is not repeatable
LED on the readhead is flashing Red
over the reference mark
Multiple reference marks are
being output
LED on the readhead is flashing Red and
Purple (analogue variant only)
LED on the readhead flashing Red four
times on switch on
QUANTiC RTLC40 / FASTRACK installation guide
Cause
Only the chosen reference mark that has
been used in the calibration sequence is
repeatable, other reference marks may
not be phased
The reference mark is not phased
The readhead reference mark option is
either option B or F, 'All reference marks
are output'
AGC out of normal operating range
Low signal, over signal, or overspeed;
system in error
Incorrect termination (analogue variant only)
Possible solutions
u Ensure you are not over-speeding the readhead during calibration mode (maximum speed < 100 mm/sec)
u Calibrate the system (page 13)
• If the system completes calibration mode then it has successfully seen and calibrated the reference mark.
If you still don't see a reference mark then check the system wiring.
• If the system does not calibrate the reference mark (LED on the readhead remains double flashing Blue) see
above for possible solutions
u Ensure you are using the reference mark that has been calibrated for referencing your system
u The readhead bracket must be stable and not allow any mechanical movement of the readhead
u Clean the scale and readhead optical window and check for damage then recalibrate the system over
the chosen reference mark (page 13)
u Ensure you are using the reference mark that has been calibrated for referencing your system as only this reference
mark will be guaranteed to remain phased
u Clean the scale and readhead optical window and check for scratches then recalibrate the system over the chosen
reference mark (page 13)
u Calibrate the system ensuring both Step 1 and Step 2 are completed
u Ensure you calibrate the reference mark used for referencing your system as only this reference mark will be guaranteed
to remain phased
u Check output signal termination (page 19)
u When using with ADTi-100 in stand-alone mode ensure Termination tool is connected
Renishaw part number A-6195-2132
u Check cable continuity
u Ensure the correct scale and readhead combination
u Check readhead set-up and alignment (page 12)
u Check output signal termination (page 19)
u When using with ADTi-100 in stand-alone mode ensure Termination tool is connected,
Renishaw part number A-6195-2132
u Exit CAL mode and restore factory defaults
u Check readhead set-up and alignment (page 12)
(page 13)
(page 14)
16