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5.3
Inching Operation
Outline of inching operation
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 [Cd.181] or reverse JOG start signal [Cd.182] is turned ON.
The following shows the example of inching operation.
1.
When the start signal is turned ON, inching operation is carried out in the direction designated by the start signal. In this
case, BUSY signal is turned from OFF to ON.
2.
The workpiece is moved by a movement amount set in "[Cd.16] Inching movement amount".
3.
The workpiece movement stops when the speed becomes "0". In this case, BUSY signal is turned from ON to OFF. The
positioning complete signal is turned from OFF to ON.
4.
The positioning complete signal is turned from ON to OFF after a time set in "[Pr.40] Positioning complete signal output
time" has been elapsed.
■RD77MS4 operation example
PLC READY signal [Y0]
All axis servo ON [Y1]
READY signal [X0]
[Cd.181] Forward run
JOG start
BUSY signal
[X10,X11,X12,X13]
Positioning complete signal
([Md.31] Status: b15)
When the inching operation is carried out near the upper or lower limit, use the hardware stroke limit function.
(Page 243 Hardware stroke limit function)
If the hardware stroke limit function is not used, the workpiece may exceed the movement range, and an
accident may result.
5 MANUAL CONTROL
174
5.3 Inching Operation
2.
Forward run inching operation
1.
3.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
[Pr.40] Positioning complete
signal output time
4.
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Troubleshooting
