11 MANUAL CONTROL

MELSEC-Q

11.1 Outline of manual control 11.1.1 Three manual control methods

"Manual control" refers to control in which positioning data is not used, and a positioning operation is carried out in response to signal input from an external source. The three types of this "manual control" are explained below.

[1] JOG operation

"JOG operation" is a control method in which the machine is moved by only a movement amount (pulses are continuously transmitted while the JOG START signal is ON). This operation is used to move the workpiece in the direction in which the limit signal is ON, when the operation is stopped by turning the limit signal OFF to confirm the positioning system connection and obtain the positioning data address (Refer to Section 12.7.4 "Teaching function").

Movement continues while the JOG START signal is ON.

M

ON

JOG start signal OFF

Fig. 11.1 JOG operation

[2] Inching operation

"Inching operation" is a control method in which a minute movement amount of pulses is output manually in one control cycle.

When the "inching movement amount" of the axis control data is set by JOG operation, the workpiece is moved by a set movement amount. (When the "inching movement amount" is set to "0", the machine functions as JOG operation.)

JOG start signal is turned ON to move the workpiece by the movement amount of pulses which is output in one control cycle.

M

ON

JOG start signal OFF

Fig. 11.2 Inching operation

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Mitsubishi Electronics QD75P, QD75D user manual JOG operation, Inching operation