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4 APPLICABLE FUNCTIONS
4.5 Machine diagnosis
4.5
Machine diagnosis
The machine diagnosis function estimates the friction and vibrational component of the drive system in the equipment based
on the data in the servo amplifier and detects errors in machine parts such as ball screws and bearings. The machine
diagnosis function features the following functions:
Diagnosis target
Diagnosis item
Diagnosis function
Outline
Detailed
explanation
Linear guide
Ball screw
Static friction/
dynamic friction
Friction estimation function
The friction estimation function estimates and detects the
static friction (including gravity) and the dynamic friction
of guides and ball screws after operation is performed in
any operation pattern.
Friction vibration
estimation
function
Friction failure prediction
function
The friction failure prediction function predicts device
failure based on the friction estimated by the friction
vibration estimation function.
Friction failure
prediction function
Servo motor vibration
torque
Vibration estimation function
The vibration estimation function estimates and detects
the vibration level both during servo motor operation and
at a servo motor stop, and vibration frequency both
during servo motor operation and at a servo motor stop,
after operation is performed in any operation pattern.
Friction vibration
estimation
function
Vibration failure prediction
function
The vibration failure prediction function predicts device
failure based on the vibration level that has been
estimated with the vibration estimation function during
servo motor operation.
Vibration failure
prediction function
Servo motor
Equipment parts
Motor total travel
distance
Total travel distance failure
prediction function
The total travel distance failure prediction function
predicts failures of the equipment and the servo motor,
based on the servo motor total travel distance.
Total travel
distance failure
prediction function
Gear
Backlash value
Backlash estimation function
The backlash amount of the gear connected to the servo
motor is estimated from the servo motor drive status.
Gear failure
diagnosis function
Gear failure diagnosis
function
Gear failure is predicted based on the estimated
backlash amount.
Gear failure
diagnosis function
Belt
Belt tension
Friction failure prediction
function
For the static friction failure prediction function, the
deterioration in belt tension is predicted by the increase/
decrease of the static friction estimated by the friction
estimation function.
Belt tension deterioration
prediction function
The belt tension deterioration prediction function
estimates the belt tension from the servo amplifier
internal data and predicts when the belt tension is below
the set threshold using the belt tension servo parameter.