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MX Multiplier Option Manual
1.3.
Multiplier Board Setup
The type of input signals determines the components of the headers, RCN1, RCN2, and
RCN3. Refer to Section 1.4.7. to select the correct component values. The amplified input
signals are available at test points TP9 (sine) and TP10 (cosine) and are set by adjusting
the potentiometers. While the motor is turning, perform the following:
1.
Adjust the pot R14 (refer to Figure 1-4) to set the phase between the input sine and
cosine signals to 90 degrees.
2.
Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot
R15 to remove offset of cosine signal (TP10).
3.
Adjust the gain for the cosine signal to be a 4V peak-to-peak signal by adjusting pot
R16.
4.
Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot
R17 to remove offset of sine signal (TP9).
5.
Adjust the gain for the sine signal to be a 4V peak-to-peak signal by adjusting pot
R18.
1.4.
Hardware Configurations
The amplified input signals at Test points TP9 and TP10 should be configured for normal
4V peak-to-peak signals, see explanation in section 1.3. However, the multiplier board
has an acceptable range of amplified input signals from 2V peak-to-peak to 4.5V peak-to-
peak.
The following sections discuss the hardware used to configure the MX multiplier board.
The hardware is accessible by removing two screws securing the dust cover to the board.
1.4.1. Fault Circuitry (JP1)
The fault circuitry detects input signal magnitudes below .5 Volt peak-to-peak. If a fault is
detected, all outputs are set to a high impedance state. Jumper JP1 is set to position 1-2
(default), this enables fault detection. Setting JP1 to position 2-3 defeats fault detection.
For jumper location, refer to Figure 1-4.
1.4.2. Marker Pulse Jumper (JP4)
The marker pulse jumper in the default setting of 1-2 sets the pulse width to the minimum
pulse width. In this case, the marker is one output pulse wide and is qualified with the
input marker. When set to position 2-3, the marker signal of the encoder is an output and
is the same width as the input pulse and no qualification is performed. For jumper
location, refer to Figure 1-4.
Version 1.3
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Description and Configuration
Aerotech, Inc.
1-3
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