46
ATOM linear encoder system
• Slowly move the readhead back and forth over the chosen reference mark until the readhead set-up LED stops ashing and remains green. The reference mark is now phased. The set-up signal (V
X
)
will be a nominal 3.3V depending upon system set-up (see ‘Output specications’on page 69).
NOTE: Only the chosen reference mark that has been used in the calibration routine is guaranteed toremain phased.
• The system automatically exits the CAL routine and is ready for operation.
• If the readhead set-up LED continues double-ashing blue after passing the chosen reference mark many times, it is not detecting the reference mark. Ensure that the readhead orientation and lateral
offset are correct.
Step 2 – Reference mark phasing
Calibration routine – manual exit
• The calibration routine can be exited at any stage. Depending upon the interface used follow the relevant section in the table below to exit CAL mode.
• On successful exit, the readhead set-up LED will stop ashing blue and remain green.
No interface ACi interface Ri interface Ti interface
Ground the CAL pin
for <2seconds.
Connect the CAL pads
together or ground the
remote CAL line (pin 8)
for <2seconds.
Press and hold the
CAL button on the
side of the interface
for <2seconds.
Press the CAL button on
the end of the interface
for <2seconds.