Instruction manual

CHAPTER 3 Operating Procedures
3 - 38
(1) Overall setup
Read the following instructions. If you are sure that your machine will remain intact
and create no safety hazard, you can use the default settings for making
measurements.
(a) Frequency range
Define the machine resonance frequency measurement range as directed
below:
If an approximate resonance frequency is known:
Enter a frequency range that covers about fives times the approximate
resonance frequency.
If an approximate resonance frequency is not known:
Select a range of "- 900 Hz".
After the resonance frequency is measured, you should set a frequency range
that covers about fives times the measured resonance frequency, and then
measure the resonance frequency again. It would produce a relatively
accurate measurement result.
(b) Torque (command )
Set the diagnostic signal torque amplitude for mechanical system diagnostic
measurements.
For measurement accuracy assurance purposes, you should select an
adequately high amplitude (100% or lower). Note, however, that the higher the
amplitude, the greater the torque applied to the machine.
(c) Speed (command)
Mechanical system diagnostic checkout is performed while an operation is
conducted at a constant speed. Therefore, specify the constant speed by
entering a speed command.
The entered speed should be between 100 min
-1
and rated speed (3000 min
-1
for the standard product), adequately high but not detrimental to the machine,
and appropriate for stable rotation.
(d) Allowable (operation range)
The distance moved for mechanical system diagnostics is displayed in terms of
the equivalent number of servomotor rotations. The machine comes to an
immediate stop at the end of the mechanical system diagnostic checkout, but
moves slightly more than the displayed value due to the inertia of the machine.
You should reposition the servomotor so that the machine can move slightly in
excess of the displayed number of rotations, decrease the speed command
value, or reduce the operation range adjustment value, which is adjustable
from the advanced setup by clicking [Options] button.
(2) Advanced setup
You do not have to perform advanced setup under normal conditions. However,
you can enter any necessary advanced setup data by clicking [Options] button.