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MDS-D/DH Series Specifications Manual
3-6 Diagnosis function
3-6-2 Machine resonance frequency display function
If resonance is generated and it causes vibrations of the current commands, this function estimates the
vibration frequency and displays it on the NC monitor screen (AFLT frequency).
This is useful in setting the notch filter frequencies during servo adjustment. This function constantly
operates with no need of parameter setting.
3-6-3 Machine inertia display function
With this function, the load current and acceleration rate during motor acceleration are measured to estimate
the load inertia.
According to the parameter setting, the estimated load inertia is displayed on the NC monitor screen,
expressed as its percentage to the motor inertia.
3-6-4 Motor temperature display function
The temperature sensed by the thermal sensor attached to the motor coil is displayed on the NC screen.
3-6-5 Load monitor output function
A spindle motor's load is output as an analog voltage of 0 to 3V (0 to 120%). To use this function, connect a
load meter that meets the specifications.
3-6-6 Open loop control function
This function is to run a spindle motor for operation check before or during the adjustment of the spindle
motor's detector. This allows the operation in which no detector feedback signals are used.
3-6-7 Power supply voltage display function
The converter bus voltage in main circuit power is displayed on the NC monitor screen.