Instruction manual

156
Machine Analyzer (Monitor Area) (FR-A700, A701 with Vector Control)
Procedure of Machine Analyzer operation
(1) Set Stml condition.
• "% of rated Torque" ........ Set the maximum oscillation torque for oscillating the motor under a random
torque command. (Setting range: 1 to 100%)
• "Stroke" .......................... Set the rotation range permitted for oscillation, beginning at the motor position
when Machine Analyzer is started. If this range is exceeded, Machine analyzer is
stopped immediately, and the motor is coasted in the vertical shaft mode or is
coasted after deceleration in the normal mode. (Setting range:  to 1000)
REMARKS
• If a measuring result varies, accurate measuring may not have been acquired.
• Accurate measuring may not be acquired in a mechanical system whose oscillation torque is too small or whose friction is
large. In such a case, increase the oscillation torque and restart Machine Analyzer.
• If the oscillation torque is too large relative to the load inertia moment, an overcurrent or similar alarm may occur. At that time,
reduce the oscillation torque and restart Machine Analyzer.
• Starting oscillation automatically switches to the torque control mode and shifts the position. Before starting operation after
oscillation, therefore, always return to a home position.
(2) Select the Stml mode
• "Normal mode" ............. The inverter operates in the torque control mode and oscillates the motor
randomly.
• "Vertical Axis Mode" ..... A servo lock is placed in the speed control mode, preventing a fall. Gain setting
must have been acquired to ensure that stable servo lock operation will be
performed.
REMARKS
In "Vertical Axis Mode"
• The accuracy of 100Hz or less on the low frequency side may become poor.
• The measuring accuracy becomes poor if the position loop gain (Pr. 422) is set too high.
Note
When the machine is a vertical shaft, always perform this function in the "Vertical Axis Mode" since a fall may occur.