Mitsubishi Electric MELSERVO-J5 User Manual page 256

Friction failure prediction [G] [B]
When upper and lower limit thresholds are input to the servo amplifier, the servo amplifier starts friction failure prediction. If the
dynamic friction (at rated speed) estimated by the friction estimation function exceeds the upper or lower limit threshold during
the friction failure prediction, [AL. 0F7.2 Friction failure prediction warning] occurs. After the occurrence of [AL. 0F7.2 Friction
failure prediction warning], if the dynamic friction (at rated speed) falls within the upper and lower limit threshold, [AL. 0F7.2
Friction failure prediction warning] will be canceled.
Dynamic friction
(at rated speed)
ON
WNG
(Warning)
OFF
Friction failure prediction [A]
When upper and lower limit thresholds are input to the servo amplifier, the servo amplifier starts friction failure prediction. If the
dynamic friction (at rated speed) estimated by the friction estimation function exceeds the upper or lower limit threshold during
the friction failure prediction, [AL. 0F7.2 Friction failure prediction warning] occurs. After the occurrence of [AL. 0F7.2 Friction
failure prediction warning], if the dynamic friction (at rated speed) falls within the upper and lower limit threshold, [AL. 0F7.2
Friction failure prediction warning] will be canceled.
Dynamic friction
(at rated speed)
ON
WNG
(Warning)
OFF
4 APPLICABLE FUNCTIONS
254
4.5 Machine diagnosis
Torque
Torque
Time
Threshold = [Pr. PF42] + [Pr. PF43] × [Pr. PF40.0]
[Pr. PF43] × [Pr. PF40.0]
[Pr. PF42]
Time
Threshold = [Pr. PF54] + [Pr. PF55] × [Pr. PF52.0]
[Pr. PF55] × [Pr. PF52.0]
[Pr. PF54]