Renishaw ATOM

70
ATOM linear encoder system
Form – Square wave differential line driver to EIA RS422A.
All ACi interfaces, Ri interfaces and Ti digital interfaces.
Incremental
1
2 channels A and B in quadrature (90 ° phase shifted)
Reference
1
Signal period
Resolution
Z
Synchronised pulse Z, duration as resolution
Set-up
2
Ti interfaces
Voltage at X
1
100%
0
0
Signal level
Set-up signal voltage proportional to incremental signal amplitude
¹
Inverse signals not shown for clarity.
2
Set-up signals as shown are not present during calibration routine.
Between 50% and 70% signal level, X is a duty cycle.
Time spent at 3.3V increases with incremental signallevel.
At >70% signal level X is nominal 3.3V.
Voltage at X
3.3V (nom)
50%
70%
100%
0
0
Signal level
ACi interfaces and Ri digital interfaces
During normal operation
A
B
Digital output signals