Mitsubishi C70 User Manual

2. CNC Monitor Screen
2.7 Diagnosis
I - 163
2.7.2.4 Synchronous Error
The vario
us d
ata related to the synchronous error is monitored.
Display item Explanation
ERR COMMAND 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”
− Δ
Command ”s”: Slave axis command value
Command ”m”: Master axis command value
Δ
: Command ”s”
−
command ”m” at start of synchronous control
ERR FB 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
− Δ
FBs : Slave axis feedback value
FBm: Master axis feedback value
Δ
: FBs
−
FBm at start of synchronous control
MACHINE This displays the machine position of the master axis.
(Note 1) The error offset amount “Δ” is made when the operation method is changed because the PLC
interface, "Synchronization control operation method" is changed.
Note that if the zero point has not established, the error offset amount “Δ” is made immediately
after the zero point is established.
(Note 2) The following table indicates what is displayed for each item.
Synchronous operation Independent operation Asynchronous operation
Axis name Displayed Displayed Not displayed
Command error Displayed Display 0.000 Display 0.000
FB error Displayed Display 0.000 Display 0.000
Machine position Displayed Displayed Display 0.000

Mitsubishi C70 Specifications

General

Brand	Mitsubishi
Model	C70
Category	Control Unit
Language	English