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Description and Configuration
1.3.3. Adjustment Procedure
Diagram A (Ideal)
SIN-N & COS-N Sweep Display No Phase, Gain or Offset Error
S IN - N
C O S - N
0 .5 V O L T / D IV IS IO N
0 .1 M IL L IS E C O N D /D IV IS IO N
Figure 1-4.
1-4
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1.
Verify that oscilloscope is isolated from ground.
An oscilloscope that is not isolated may cause permanent damage to the multiplier.
2.
Connect signal common of scope to TP5 (2.5VDC reference voltage), channel A
scope probe to TP10 (COS-N), and channel B scope probe to TP9 (SIN-N).
Refer to Figure 1-6 for MXH part locations.
3.
Display encoder signals as a Lissajou pattern on the oscilloscope (x y mode).
4.
Set channels A & B of the oscilloscope for 0.5 volts DC per division, and zero
the scope reference to the center of the display.
5. Move table over the entire range of travel at a low speed, and verify that the
peak to peak amplitude of the circular pattern is between 2 to 3.9 Vp-p.
6.
Move the table to the area where the amplitude is the largest, and verify or adjust
for the following. (See Diagram A – Diagram H in Figure 1-4 and Figure 1-5 for
examples.)
6.1.
COS-N gain is 3.8 Vp-p (+/- 0.1 Vp-p). Adjust R16 if necessary.
6.2.
COS-N DC offset is 0 VDC (+/- 0.1 VDC). Adjust R15 if necessary.
6.3.
SIN-N gain is equal to COS-N gain (+/- 0.1 Vp-p). Adjust R18 if
necessary.
6.4.
SIN-N DC offset is 0 VDC (+/- 0.1 VDC). Adjust R17 if necessary.
6.5.
Phase error is 0 degrees (+/- 4.5 Degrees). Adjust R14 if necessary.
6.6.
Repeat steps 6.1 through 6.5
7. Move table over the entire range of travel at a low speed and verify the following
information in Table 1-1.
Ideal Oscilloscope Displays (Sweep and Lissajou)
Aerotech, Inc.
MXH Multiplier Option Manual
Diagram B (Ideal)
SIN-N & COS-N Lissajou Display No Phase, Gain, or Offset Error
S I N - N
0 . 5 V O L T / D I V I S IO N
C O S - N
Version 1.6
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