Omron NJ501-1300, User Manual

Page: 168 / 432

8 Homing
8-2
NJ-series CPU Unit Motion Control User’s Manual (W507)
8-1 Outline
This section describes the operations that are performed when the MC Function Module is combined
with an OMRON G5-series Servo Drive.
To perform positioning to absolute positions in a positioning system, you must first define the home. For
example, if you want to perform positioning to the position (axis 1, axis 2) = (100 mm, 200 mm) in the
XY plane shown below, you must define the position of home (0,0). The process of defining home is
called homing.
In the MC Function Module, use the motion control instruction MC_Home to define home.
Precautions for Correct Use Precautions for Correct Use
The defined home is lost in the following situations.
• When MC_SetPosition is executed.
• When an overflow or underflow occurs in Linear Mode.
• When homing is started.
• The control state of EtherCAT communications is not Operational state.
Additional Information
If you are using an OMRON G5-series Servomotor with an absolute encoder, home is defined
when the MC_Power input variable
Enable changes to TRUE.
Name Description
Homing Home is defined by actually moving the motor and using the limit sensors, home prox-
imity sensor, and home input signal to determine the position of home.
Use a proximity sensor or the encoder’s Z phase signal as the home input signal.
(100,200)
(0,0)
Axis 1
Axis 2