What's the maximum length of cable that I can have between the driver and a micrometer replacement actuator?

The cable for the micrometer replacement actuator (MRA) is a 4-wire telephone cable with approximately 28-gauge wire. With this small-diameter wire, the maximum length of the cable is about 25 feet or 7.6 meters. Beyond this length, the Picomotor will not function properly because the resistance in the wire significantly distorts the high-voltage waveform that drives the piezo.

You can cut and splice cables to make a longer one. Keep in mind that each MRA only uses two of the four wires: the yellow and green wires. The red and black wires are not connected.

Note: if you use a thicker wire such as a 20-gauge wire, it is possible to extend the micrometer-replacement actuator cable to 100 ft. more.

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