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4 APPLICABLE FUNCTIONS
4.5 Machine diagnosis
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Threshold setting for belt tension
Set a threshold to generate [AL. 0F7 Machine diagnosis warning]. When the belt tension estimated value inside the servo
amplifier falls below the belt tension threshold, [AL. 0F7 Machine diagnostic warning] occurs.
*1 Belt tension threshold = [Pr. PF76 Belt tension irregular threshold]/100 × [Pr. PF72 Belt tension on installation]
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Belt tension prediction warning selection setting
To enable belt tension prediction warning, set [Pr. PF71.0 Belt tension deterioration prediction function selection].
Furthermore, when a value other than 0 is set in [Pr. PF72 Belt tension on installation], [Pr. PF73 Belt tension when extended],
[Pr. PF74 Static friction during installation], and [Pr. PF75 Static friction when extended], setting a value other than "0"
(disabled) in [Pr. PF71.0 Belt tension deterioration prediction function selection] will estimate the belt tension.
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Belt tension deterioration prediction function
During belt tension prediction, [AL. 0F7 Machine diagnostic warning] occurs when the static friction estimated by the friction
estimation function falls below the threshold. After the occurrence of [AL. 0F7 Machine diagnosis warning], if the static friction
becomes equal to or higher than the threshold value, [AL. 0F7 Machine diagnostic warning] will be canceled.
Servo
parameter
Symbol
Name
Description
PF76
BTS
Belt tension irregular threshold
Set a threshold to generate [AL. 0F7 Machine diagnosis warning]. Set this servo
parameter as a percentage of [Pr. PF72 Belt tension on installation]. When using the
belt diagnosis function, input a value other than 0.
Initial value: 0.0 [%]
Servo
parameter
Symbol
Name
Description
[Pr. PF71.0]
BFP
Belt tension deterioration
prediction function selection
Belt tension deterioration prediction function selection
0: Disabled (initial value)
1: Execute only belt tension estimation
2: Belt tension deterioration prediction function enabled
After the equipment goes into actual operation, enable the belt tension deterioration
prediction function.
[Pr. PF72
Belt tension on installation]
[Pr. PF73
Belt tension when extended]
Belt tension threshold
*1
Static friction
that triggers
a warning
[Pr. PF75
Static friction
when extended]
[Pr. PF74
Static friction
during installation]
ON
OFF
WNG
[Tension estimation value
(Obj. 2C36h)]
Torque
Time
Static friction
(Warning)