MicroE 1500S Mercury - Manual (Page 9)

Page 7
4
INDEX TRACK ALIGNMENT
The M1500S must be aligned for both the main and
index tracks. When properly aligned, the sensor will
produce an index window as the sensor passes over
the index mark. The index window is approximately
one fringe wide (20µm). To verify proper index track
alignment, use a digital oscilloscope triggered on the
index window. Refer to the interface drawing for the
index window pinout.
Confirm proper alignment of the main track
over the full range of motion. If not aligned
over the entire range of motion, loosen the
sensor mounting screws and repeat steps
4 and 5.
5
MAIN TRACK ALIGNMENT
If benching dimensions cannot be provided, proper
sensor alignment may require minor adjustments
to the sensor position with respect to the scale.
This can be performed by maximizing the sine
signal from the M1500S.
Using an oscilloscope, monitor the sine or cosine signal (refer to
the interface drawing for pinouts) while moving the sensor over
the scale. Align the sensor until 0.8 volts peak-to-peak +/- 25%
is obtained. When alignment is completed, tighten the sensor
mounting screws (0.37Nm [3.3 inch-lbs.] maximum torque).
x
Y
Z
θ
z
To align the sensor, move
it in the Y or
θ
z directions.
Installation Instructions
Linear Encoders - Using Sin/Cos Signals - Alignment
0.8 Vpp
1.7 V offset
(nominal)