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Troubleshooting
Fault
LED on the readhead is Blank
LED on the readhead is Red and I
cannot get a Green LED
Unable to get a Green LED over the
complete axis length
Cannot initiate the calibration routine
LED on the readhead remains single
flashing Blue even after moving it
along the full axis length
LED on the readhead appears Purple
ATOM linear installation guide
Cause
There is no power to the readhead
The signal strength is < 50%
System run-out is not within specification
Cabled D-type readhead does not have CAL button
The system has failed to calibrate the incremental
signals due to the signal strength being < 70%
before the calibration routine was initiated
This is Blue and Red combined. AGC is switched
on and signal level is < 50%
Possible solutions
Ensure 5 V supplied at the readhead
For cable variants check correct wiring of connector
NOTE: Analogue and digital systems have different pin-outs
When using Ti, Ri or cabled ACi interfaces check the interboard connector that plugs in the interface is properly seated
and the correct orientation
For FPC variants check correct insertion and orientation of the FPC cable.
Check the readhead optical window and scale are clean and free from contamination
Restore factory defaults
(page 29)
and check alignment of the readhead. In particular;
– Rideheight
– Yaw
– Offset
Check the scale and readhead orientation
Check that the readhead variant is the correct type for the chosen scale
(see the ATOM
™
miniature encoder system data sheet (Renishaw part no. L-9517-9563) for details of readhead configuration).
Check that the readhead variant is the correct type for the chosen scale
(see the ATOM
miniature encoder system data sheet (Renishaw part no. L-9517-9563) for details of readhead configuration)
™
Use a DTi gauge and check the run-out is within specifications
Restore factory defaults
Realign readhead to obtain a Green LED at the mid-point of the run-out
Recalibrate the system
(page 28)
If not using an interface with a CAL button, check that the correct pin is being shorted to 0 V for < 2 seconds
Check that the signal size is > 70% before initiating calibration.
Exit CAL mode and restore factory defaults
Check system set-up and realign the readhead to obtain a Green LED along the full axis of travel before recalibrating.
Check the readhead optical window and scale are clean and free from contamination
Restore factory defaults
(page 29)
then check the LED is Green along the full axis and recalibrate the system
If it is not Green check the alignment of the readhead.
(page 29)
(page
28).
31
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