Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 231

■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.
[Pr. PF72
Belt tension on installation]
[Pr. PF73
Belt tension when extended]
*1
Belt tension threshold
*1 Belt tension threshold = [Pr. PF76 Belt tension irregular threshold]/100 × [Pr. PF72 Belt tension on installation]
Servo Symbol
parameter
PF76 BTS
■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.
Servo Symbol
parameter
[Pr. PF71.0] BFP
■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.
Torque
Static friction
[Tension estimation value
(Obj. 2C36h)]
ON
WNG
(Warning)
OFF
Static friction [Pr. PF75 [Pr. PF74
that triggers Static friction Static friction
a warning when extended] during installation]
Name
Belt tension irregular threshold
Name
Belt tension deterioration
prediction function selection
Description
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 [%]
Description
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.
Time
4 APPLICABLE FUNCTIONS
4.5 Machine diagnosis
4
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