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2.2
Machine Home Position Return
Outline of the machine home position return operation
Machine home position return operation
In a machine home position return, a home position is established.
None of the address information stored in the Simple Motion module, CPU module, or servo amplifier is used at this time.
The position mechanically established after the machine home position return is regarded as the "home position" to be the
starting point for positioning control.
M
Home position
Proximity dog
The method for establishing a home position by a machine home position return differs according to the method set in "[Pr.43]
Home position return method".
The following shows the operation when starting a machine home position return.
■When "[Pr.43] Home position return method" is set to other than "Driver home position return
method"
1.
The "machine home position return" is started.
2.
The operation starts according to the speed and direction set in the home position return parameters ([Pr.43] to [Pr.57]).
3.
The "home position" is established by the method set in "[Pr.43] Home position return method", and the machine stops.
Page 33 Machine home position return method to Page 41 Scale origin signal detection method
4.
If "a" is set as "[Pr.45] Home position address", "a" will be stored as the current position in the "[Md.20] Feed current
value" and "[Md.21] Machine feed value" which are monitoring the position.
5.
The machine home position return is completed.
Use the home position return retry function when the home position is not always in the same direction from
the workpiece operation area (when the home position is not set near the upper or lower limit of the machine).
The machine home position return may not complete unless the home position return retry function is used.
■When "[Pr.43] Home position return method" is set to "Driver home position return method"
1.
Set the home position return parameters of the servo amplifier.
2.
The "machine home position return" is started.
3.
The operation starts according to the speed and direction set in the servo amplifier.
4.
The "home position" is established and the machine stops.
5.
If "a" is set as "[Pr.45] Home position address", "a" will be stored as the current position in the "[Md.20] Feed current
value" and "[Md.21] Machine feed value" which are monitoring the position.
6.
The machine home position return is completed.
The method for establishing a "home position" by a driver home position return method differs according to the
setting of the servo amplifier. For details, refer to the servo amplifier instruction manual.
2 HOME POSITION RETURN CONTROL
32
2.2 Machine Home Position Return
Machine home position return
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