4 APPLICABLE FUNCTIONS
4.5 Machine diagnosis
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4
■Belt tension deterioration prediction function
For the belt tension deterioration prediction function, [AL. 0F7 Machine diagnostic warning] occurs when the belt tension that
is estimated from the servo amplifier internal data is equal to or lower than the input threshold of the belt tension servo
parameter. Although the relationship between the belt tension and the static friction needs to be input with servo parameters,
this function can improve the accuracy in detection of the belt tension deterioration by estimating the belt tension and
outputting [AL. 0F7 Machine diagnosis warning].
Differences between the static friction failure prediction function and the belt tension deterioration function are shown on the
following table.
Item Friction failure prediction function Belt tension deterioration prediction function
Determination criteria Static friction Belt tension
Threshold setting Automatic setting possible Manual setting
Input required servo
parameter
[Pr. PF34.5 Static friction failure prediction warning selection]
[Pr. PF41 Failure prediction - Servo motor total travel distance]
[Pr. PF71.0 Belt tension deterioration prediction function
selection]
[Pr. PF72 Belt tension on installation]
[Pr. PF73 Belt tension when extended]
[Pr. PF74 Static friction during installation]
[Pr. PF75 Static friction when extended]
[Pr. PF76 Belt tension irregular threshold]
Belt tension deterioration
detection accuracy
Low High
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