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Appendix E: Motor Cables
This section contains Hudson motor extension cable fabrication tips and
guidelines.
Cable Drawings
Example Hudson motor cable drawings are located at Teknic.com:
Golden Rules for Motor Cable Construction
1.
Use low capacitance, shielded twisted pair cable for the encoder and
commutation (Hall) signals.
2.
IMPORTANT
: Do not ground the encoder cable shield to the motor
case.
3. Don’t run the motor’s commutation (Hall) signals through the motor
phase cable at any point. Use two cables, one for low voltage signals
and one for motor phases.
4.
Use 16AWG or larger shielded cable for motor phases.
5.
Motor phase leads should be kept as short as possible where they
exit the cable shield, preferably under 2”
.
6.
The motor phase cable shield termination should be kept short at
both ends, preferably under 2”.
7. The motor phase cable shield must not come in contact with the
encoder cable shield at any point outside of the servo drive.
Failure to isolate these shields properly will result in electrical
noise problems on the encoder signals. Insulate any exposed
shield wires to prevent shields from touching.
