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Servo Motor Resistance Test
On stepper motors, disregard the green (ground) wires going into the connector and measure the resis-
tance of the servo motor by pushing the leads of the ohmmeter into the connector until they contact the
pins as shown in the image above.
•
IMPORTANT: Set the multimeter to the ohm scale and zero it out by touching the two leads
together and pushing the reset button. If the meter you are using does not have a reset button,
take note of the resistance measured when the two leads are touched together and subtract
that from the actual measurement to get the true resistance measurement.
If the resistance is zero ohms or close to it, it indicates the motor has a short. If the measurement is high,
it indicates a break in the circuitry of the motor. Measure the resistance between each of the phase (non-
green) wires.
Servo Motor Resistance Specication
X-Motor 3.4Ω
Y-Motor 3Ω
New Z-Motor 0.6Ω
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