Outline Of Inching Operation - Mitsubishi Electric QD77MS User Manual

11.3 Inching operation

11.3.1 Outline of inching operation

[QD77MS4 operation example]
PLC READY signal [Y0]
All axis servo ON
[Y1]
READY signal [X0]
Forward run JOG start signal
[Y8, YA, YC, YE]
BUSY signal
[XC, XD, XE, XF]
Positioning complete
signal
[X14, X15, X16, X17]
Inching operation
In inching operation, pulses are output to the servo amplifier at operation cycle to
move the workpiece by a designated movement amount after the forward run JOG
start signal or reverse JOG start signal is turned ON.
Signal
Forward run JOG start signal
Reverse run JOG start signal
The following shows the example of inching operation.
When the start signal is turned ON, inching operation is carried out in the direction
1)
designated by the start signal. In this case, BUSY signal is turned from OFF to ON.
The workpiece is moved by a movement amount set in "[Cd.16] Inching movement
2)
amount".
The workpiece movement stops when the speed becomes "0". In this case, BUSY signal
3)
is turned from ON to OFF. The positioning complete signal is turned from OFF to ON.
The positioning complete signal is turned from ON to OFF after a time set in "[Pr.40]
4)
Positioning complete signal output time" has been elapsed.
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
Fig. 11.11 Inching operation
QD77MS2 QD77MS4
Y8, YA Y8, YA, YC, YE
Y9, YB Y9, YB, YD, YF
2)
Forward run inching operation
1) 3)
ON
ON
ON
Pr.40
Positioning complete signal
output time
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
11 - 15
Chapter 11 Manual Control
QD77MS16
[Cd.181] Forward run JOG start
[Cd.182] Reverse run JOG start
4)