Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 230

■Setting "Static friction when extended"
After attaching the belt to the equipment, drive the servo motor, and estimate the static friction with the friction vibration
estimation function. In accordance with the completed static friction estimation, set [Pr. PF75 Static friction when extended] as
follows.
• When estimation of static friction has completed only for the forward rotation side
[Pr. PF75 Static friction when extended] = Static friction on the forward rotation side
• When estimation of static friction has completed only for the reverse rotation side
[Pr. PF75 Static friction when extended] = Static friction on the reverse rotation side
• When estimation of static friction has completed for both the forward and reverse rotation sides
[Pr. PF75 Static friction when extended] = (Static friction at forward + at reverse rotation)/2
Servo Symbol
parameter
PF75 ASF
■Setting "Belt tension on installation"
Set the design value of belt tension in [Pr. PF72 Belt tension on installation]. Measure the belt tension using a tension gauge.
It is recommended to use the friction vibration estimation function to measure the value of belt tension immediately after the
friction estimation completes. For friction vibration estimation function, refer to the following.
Page 178 Friction vibration estimation function
Servo Symbol
parameter
PF72 SBT
■Setting "Static friction during installation"
After attaching the belt to the equipment, drive the servo motor, and estimate the static friction with the friction vibration
estimation function. It is recommended to perform both forward rotation and reverse rotation in order to estimate the static
friction at both rotation directions. In accordance with the estimated static friction, set [Pr. PF74 Static friction during
installation] as follows.
• When estimation of static friction has completed only for the forward rotation side
[Pr. PF74 Static friction during installation] = Static friction on the forward rotation side
• When estimation of static friction has completed only for the reverse rotation side
[Pr. PF74 Static friction during installation] = Static friction on the reverse rotation side
• When estimation of static friction has completed for both the forward and reverse rotation sides
[Pr. PF74 Static friction during installation] = (Static friction at forward + at reverse rotation)/2
Servo Symbol
parameter
PF74 SSF
4 APPLICABLE FUNCTIONS
228
4.5 Machine diagnosis
Name
Static friction when extended
Name
Belt tension on installation
Name
Static friction during installation
Description
Set a static friction for when the belt stretches or for when the belt is looser than at
the time of the attachment. Set the static friction with any of the following values
estimated by the friction estimation function depending on the value of [Pr. PF71.1
Belt tension deterioration prediction friction selection]: static friction at forward
rotation, static friction at reverse rotation, or the average of the estimated frictions.
The belt tension deterioration function is disabled when the setting is: [Pr. PF74 Static
friction during installation] < [Pr. PF75 Static friction when extended].
Initial value: 0.0 [%]
Description
Set a belt tension for when the belt is attached to the equipment. The servo
parameter indicates the reference belt tension threshold used in the belt diagnosis
function.
Initial value: 0.0 [N]
Description
Set a static friction for when the belt is attached to the equipment. Set the static
friction with any of the following values estimated by the friction estimation function
depending on the value of [Pr. PF71.1 Belt tension deterioration prediction friction
selection]: static friction at forward rotation, static friction at reverse rotation, or the
average of the estimated frictions.
Initial value: 0.0 [%]