MicroE 1200 Mercury - Manual (Page 7)

Installation Instructions
Linear Encoders
4
MAIN TRACK ALIGNMENT
If benching dimensions cannot be provided, proper sensor alignment may require minor adjustments
to the sensor head position with respect to the scale. This can be performed by maximizing the
sine/cosine signals from the M1200 or M1500P.
Using an oscilloscope in the X/Y mode, monitor the sine/cosine signals (refer to the interface drawing
for pinouts) while moving the sensor head. Align the sensor until 0.80 volts peak-to-peak +/- 20% is
obtained. Tighten the mounting bracket screws.
INDEX TRACK ALIGNMENT
The M1200 or M1500P must be aligned for both the main and index tracks. When properly aligned,
the sensor will produce an index window as the sensor head passes over the index mark. The index
window is roughly 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.
5
Confirm proper alignment over
the full range of motion. If not
aligned over the entire range
of motion, loosen the sensor
mounting bracket and repeat
step 4.
Page 5
To align the sensor head,
move it in the Y or
θ
z
directions.
0.80 v
Single Ended
Lissajous pattern as seen on a
scope
θ
z
Y
X