XL80 laser system
56
www.renishaw.com/xl80
Alarm conditions
The alarm lines will go active (ALARMOUT high, /ALARMOUT low) and latch
in the following situations:
•
The XL laser internal counter allows a movement of more than ±169�9 m
(231 × 79 nm)
•
A resolution of 10 nm is selected and the speed is greater than 0�2 m/s
•
A resolution of 80 nm is selected and the speed is greater than 1�6 m/s
•
The laser beam is broken (beam break)
Once set, the error line will remain active until a clear error signal has been
issued on pin 16 as shown opposite�
Figure 5
Electrical interface for clear error / datum�
Open
Closed
Active pulse width > 5 ms
Active edge
Switch bounce < 20 ms will be ignored
Datum input Pin 16
Datum input protected
to ± 12 V DC
TTL
10 K
0V
+3.3 V
