Mitsubishi Electric MELSERVO-J5 User Manual page 296
Ac servo system
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Also See for MELSERVO-J5:
- User manual (478 pages) ,
- Sample screen manual (128 pages) ,
- Introduction manual (112 pages)
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Belt tension deterioration prediction function [G] [B]
■How to use the belt tension deterioration prediction function
Follow these procedures when using the static friction prediction function.
Startup the system.
Operate the equipment with the belt loosened and complete friction
estimation.
Set a belt tension value in [Pr. PF73 Belt tension when extended] and a static
friction value in [Pr. PF75 Static friction when extended] for when the tension has
been reduced.
Operate the equipment with the belt tension adjusted to the design
value and complete the friction estimation.
Set the design value of belt tension in [Pr. PF72 Belt tension on installation] and the
static friction value in [Pr. PF74 Static friction during installation].
Input a belt tension threshold that triggers a belt failure prediction
warning to [Pr. PF76 Belt tension irregular threshold].
Set [Pr. PF71.0 Belt tension deterioration prediction function selection]
to "2" (Belt tension deterioration prediction function enabled).
Cycle the power of the servo amplifier or perform either of the
communication reset or the software reset.
Operate the equipment and complete the friction estimation.
If the estimated static friction value falls below the threshold,
[AL. 0F7 Machine diagnosis warning] will occur.
■Setting method for belt tension when extended
Lower the belt tension below the design value, then attach the belt to the equipment. Measure the belt tension using a tension
gauge. To reduce the belt tension, use a method such as shortening the distance between the pulleys or use the initial stretch
of the belt. It is recommended to reduce the belt tension to 1/2 of the design value. After attaching the belt to the equipment,
measure the belt tension and input the result to [Pr. PF73 Belt tension when extended]. It is recommended to use the friction
vibration estimation function to measure the value of belt tension at extension immediately after the friction estimation
completes. For friction vibration estimation function, refer to the following.
Page 241 Friction vibration estimation function
Servo
Symbol
parameter
PF73
ABT
4 APPLICABLE FUNCTIONS
294
4.5 Machine diagnosis
Start
Which function?
Belt tension dropping warning
End
Name
Belt tension when extended
Belt tension estimation
Set [Pr. PF71.0 Belt tension deterioration prediction function selection]
to "1" (Execute only belt tension estimation).
Cycle the power of the servo amplifier or perform either of the
communication reset or the software reset.
Operate the equipment and complete the friction estimation.
Description
After the equipment is operated, set a belt tension for when the belt
stretches or for when the belt is looser than at the time of the
attachment. After the belt has been attached to the equipment, the
time taken for the belt to stretch depends on the belt type. For the
time taken for the belt to stretch, refer to the catalog or other
documents of the belt manufacturer.
When the setting is [Pr. PF72 Belt tension on installation] < [Pr. PF73
Belt tension when extended], the belt tension deterioration prediction
function is disabled.
Initial value: 0 [0.1 N]
End
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