11 - 15
Chapter 11 Manual Control
11.3 Inching operation
11.3.1 Outline of inching operation
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 ([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.
PLC READY signal [Y0]
OFF
ON
BUSY signal [X10 to X1F]
OFF
OFF
ON
OFF
ON
Forward run inching operation
ON
OFF
READY signal [X0]
1)
2)
3) 4)
Positioning complete signal
output time
Pr.40
ON
ON
OFF
All axis servo ON [Y1]
Positioning complete signal
( Md.31 Status:b15)
Cd.181 Forward run JOG start
Fig. 11.11 Inching operation
Important
When the inching operation is carried out near the upper or lower limit, use the
hardware stroke limit function (Refer to Section 13.4.4).
If the hardware stroke limit function is not used, the workpiece may exceed the
movement range, and an accident may result.
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