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INOVANCE TECHNOLGY EUROPE GmbH
SV660N Startup Procedure_EN_v1.4_20220826.docx
6.6.6 MECHANICAL ANALYSIS
As shown in the preceding figure, the mechanical analysis function tests the speed response of the entire
system under different frequencies and generates the baud rate diagram, which helps you to find the
resonance frequency and set notches. For example, the resonance frequency shown in the preceding figure is
2195 Hz.
• Closed Loop directly measures the closed loop frequency response of the servo. Used to determine
the axis response bandwidth.
• Mechanical Analysis This trace shows the frequency response of the mechanics of the drive and
motor. Directly measures the mechanical and electrical properties of the motor, drive and any
mechanical bodies attached to the axis. Used to determine the mechanical resonance point.
The closed control loop is uses for the determination of the bandwidth, while the open control loop is regarded
for calculating the amplitude response. The bandwidth is read where the phase response first crosses the -3 dB
or the -90° line. The higher the bandwidth of a system, the more stable it is and the higher the control loop gain
can be set. This result in high dynamics.
Incentive adjustment: when selecting this check box, if the vibration is excessive the current excitation will
reduced automatically. If the current excitation set a reasonable value the ‘incentive adjustment’ function will
not work. Usually this function is not used.
Smooth: Increasing the smoothing percentage, the Bode plot traces become cleaner and easier to read. Will
not affect to test, but when there are a lot wave noise in the displayed wave, it can adjust the value to find the
Resonance frequency.
Current Excitation: Percentage of torque used to realize the test. To avoid strong vibration, the excitation level
usually set as 10% at the beginning, it can adjust the value according to the wave feedback.
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