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Axis0, Axis1 and Axis2 motor drive connectors (7w2 D socket)
Each motor connection is a 7W2 connector for connection of a CMM motor to the SPA3, as shown below:
| Pin no. | Function |
|---|---|
A1 | Positive motor connection (default) |
A2 | Negative motor connection (default) |
1 | Positive tacho input (default) |
2 | * Negative tacho input |
3 | (tacho) screen |
4 | * Negative tacho input |
5 | (tacho) screen |
Shell | Screen (motor) |
The table shows the default polarity configurations for all pins.
* NOTE: The motor and tacho polarities on the SPA3 are software configured during the installation process. The maximum tacho voltage is 100 V. If one terminal of the tacho is grounded the maximum voltage is reduced to 18 V. It is recommended that a differential tacho is used.
CAUTION: The SPA3 motor connections must be blanked off if not being used to prevent accidental contact which could result in an electric shock.