Mitsubishi Electric FR-A5NR Instruction Manual download pdf (Page 41)

Advanced Function

(2) Machine analyzer setting

Make the following settings when using Machine analyzer.

1) Stml condition

⋅ "% of rated Torq

ue".................................... Set the maximum oscillation torque for oscillating the motor

under a random torque command. (Setting range: 1 to 100%)

⋅ "Strok

e"...................................................... 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: ±1 to ±1000

revolutions)

2) Stml mode

⋅ "Normally

Mode"................The inverter operates in the torque control mode, oscillating the motor ran-

domly.

⋅ "Vertical Axis Mode

"...........A servo lock is placed in the speed control mode, preventing a drop. Gain set-

ting must have been made to ensure that stable servo lock operation will be

performed at that time.

REMARKS

• If a measurement result varies, accurate measurement may not have been made.

• Accurate measurement may not be made 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 switches to the torque control mode automatically, shifting a position. Before starting operation after

oscillation, therefore, always make a home position return.

REMARKS

In "vertical shaft mode"

⋅

The accuracy of 100Hz or less on the low frequency side may become low.

⋅

Too high setting of the position loop gain (Pr. 422) may lower the measurement accuracy.

CAUTION

When the machine is a vertical shaft, always perform this function in the "vertical shaft mode" since a

drop may occur.

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 56 57

No comments

Mitsubishi Electric FR-A5NR Instruction Manual Page 41