Troubleshooting - Renishaw ATOM Installation Manual

Troubleshooting

Fault
LED on the readhead is Blank
LED on the readhead is Red and I can't
get a Green LED
Unable to get a Green LED over the
complete axis length
Can't 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
u
For cable variants check correct wiring of connector
u
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
u
properly seated and the correct orientation
For FPC variants check correct insertion and orientation of the FPC cable
u
Check the readhead optical window and scale are clean and free from contamination
u
Restore factory defaults (see page 22) and check alignment of the readhead. In particular;
u
– Rideheight
– Yaw
– Offset
Check the scale and readhead orientation
u
Check that the readhead variant is the correct type for the chosen scale
u
(see the data sheet for details of readhead configuration)
Check that the readhead variant is the correct type for the chosen scale
u
(see the data sheet for details of readhead configuration)
Use a DTi gauge and check the run-out is within specifications
u
Restore factory defaults
u
Realign readhead to obtain a Green LED at the mid-point of the run-out
u
Recalibrate the system (see page 22)
u
If not using an interface with a CAL button check that the correct pin is being shorted to 0 V for <2 seconds
u
Check that the signal size is >70% before initiating calibration
u
Exit CAL mode and restore factory defaults (see page 22)
u
Check system set-up and realign the readhead to obtain a Green LED along the full axis of travel
u
before recalibrating
u
Check the readhead optical window and scale are clean and free from contamination
u
Restore factory defaults (see page 22) then check the LED is Green along the full axis and recalibrate
the system (see page 22). If it is not Green check the alignment of the readhead
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