Adtech CNC Technology Co., Ltd. 4. Manual operation
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4.
Manual operation
4.1 Returning to reference point manually
CNC machine tool has specific mechanical position, which is called as reference point and for tool
exchange and coordinates setting. Generally, when the power supply is connected, the tool should be moved to
the reference point. This operation is also called as home operation, which will make the CNC system confirm
the origin of machine tool.
The home operation includes program and mechanical mode:
For program home, the action completes when the coordinates of machine tool are 0, and won’t check
whether origin switch is in position;
For mechanical home, the external home sensor switch is used to locate the origin of the machine tool;
two checking modes are available:
With the external sensor switch, the home operation completes when the sensing is successfully
repeatedly.
The external sensor switch is used as deceleration switch, the servo home is enabled as home signal after
sensing and then the sensing stops.
You can set the “Home mode” in [Parameter][Comprehensive Parameter], in which 0 (default) indicates
program and 1 indicates mechanical. You can also press [SBK] key in home mode to switch among
“Mechanical – Program – Mechanical…” quickly. This method doesn’t conflict with parameter setting. You
can select accordingly. To use servo home as the home signal, you need to set “Axis phase Z home enable” to
“1” in [Parameter][Axis Configuration] in mechanical home mode, and the setting will take effect in next
home checking.
Several methods are available for tool returning to reference point and the steps follow:
⑴ Each axis returns to reference point separately
¾ Press the mode switch key [Home] to select home operation;
¾ Press the composite key [X-], [Y-], [Z-], [A-] in the numbers section to return the corresponding axis to reference point.
⑵ The axes return to reference point simultaneously
¾ Press the mode switch key [Home] to select home operation;
¾ Press the [Start] key to return Z axis to reference point, and other axes return to reference point simultaneously. The
automatic home sequence can be configured in the parameters.
⑶ Reset machine tool position
¾ Press the mode switch key [Home] to select home operation;
¾ In [Absolute Position] and [Coordinate System] screen, press [X], [Y], [Z], [A] respectively to show the value of
corresponding axis position, and then press the [Cancel] key to reset the machine tool position of current axis, i.e.
current point is used as machine tool origin. After this operation, the system considers it as a home action. Therefore,
when the program is running, the alarm of not home won’t occur. If you press by mistake, it will switch the screen and
cancel selection automatically.
⑷ Reset relative position manually
¾ Press the mode switch key [Manual] to select manual operation;
¾ In [Relative Position] and [Coordinate System] screen, press [X], [Y], [Z], [A] respectively to show the value of
corresponding axis, and then press the [Cancel] key to reset the relative position of current axis.
) Note
The tool also can return to reference point according to program instruction, i.e. returning to reference point automatically.
0 Caution:
Generally, the system will perform home operation after connecting the power supply. If the power fails while the machine
tool is moving, the system also will return to reference point when the power supply is connected again. Return to Z axis to
prevent tool and workpiece from colliding, and damaging tool, workpiece and clamp.
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