Mitsubishi Electric MELDAS 600M Series Instruction Manual page 290

5.4.5 Display items for the synchronous error
The various data related to the synchronous error is monitored.
Change the display items using the
Slave axis
Command error
FB error
FB error MAX1
FB error MAX2
Machine posn
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CHAPTER 1 SCREEN OPERATIONS
Display item
This displays the slave axis No. corresponding to the master axis.
This is the deviation of the slave axis machine value in respect to the
master axis. The error of the command value to the servo control section
before pitch error compensation, relative position compensation and
backlash compensation is displayed.
If this error occurs, the parameters that should be the same for the
synchronous axes are different.
Command error = Command s − command m − ∆
Command s : Slave axis command value
Command m: Master axis command value
This is the deviation of the slave axis feedback value in respect to the
feedback value from the master axis servomotor. The error of the actual
machine position is displayed. The synchronous error check is carried
out on this error.
FB error = FBs − FBm − ∆
FBs : Slave axis feedback value
FBm: Master axis feedback value
∆: FBs − FBm at start of synchronous control
This displays the max. FB error value from the start of synchronous
control.
This displays the max. FB error value at every approx. 30 seconds from
the start of synchronous control.
This displays the commanded machine position for the master axis.
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5. Diagnosis Screens
key and key to refer to the data.
Details
∆ : Command s − command m at start of synchronous
control
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