Synchronous Error - Mitsubishi Electric MELDAS C6 Instruction Manual

2.7.2.6 Synchronous Error

The various data related to the synchronous error is monitored.
Display item
ERR COMMAND
ERR FB
MACHINE
(Note 1) The error offset amount " ∆ " is made when the operation method is changed because R932
(Note 2) The axis names in this screen are displayed only during the synchronous or independent
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2. Screen Operation of A985GOT
[SYNCHRONOUS]
ERR COMAND
ERR FB
MACHINE
ERR COMAND
ERR FB
MACHINE
SPINDLE
ALARM
SERVO
This is the deviation of the slave axis machine position in respect to the
master axis. This displays the error of the command value to the servo
control section before compensating the pitch error, incremental
position, or backlash.
If this error occurs, the parameters that should be the same for the
synchronous axes are different. Check the setting value.
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. This displays the error
of the actual machine position. 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 machine position of the master axis.
R1032 register is changed.
Note that if the zero point has not established, the error offset amount " ∆ " is made
immediately after the zero point is established.
operation.
The value of "ERR COMMAND", "ERR FB" and "MACHINE" are displayed only during the
synchronous operation. Thus, these became "0.000" during the asynchronous or
independent operation.
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2.7 Diagnosis
ALARM/DIAG 2. 6/ 6
PLC-I/F MENU
Explanation
∆ : Command "s" − command "m" at start of synchronous
control
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