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Machine operating area 01/2008
4.3 Reference point approach
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© Siemens AG 2008 All rights reserved.
4-112 SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
Machine manufacturer
The selected axis moves to the reference point. The direction and
sequence is defined by the machine manufacturer in the PLC
program.
If you have pressed the wrong direction key, the action is not
accepted and the axes do not move. The display shows the reference
point value.
No symbol is displayed for axes that are not referred to a reference
point.
This symbol is displayed for axes that need to be referenced.
This symbol is shown next to an axis if it has been referenced.
Feed Stop
The axis, once started, can be stopped before it reaches the reference
point.
+X
...
X
Turning machine:
Press the "Axis" keys.
X
...
9th Axis
Milling machine:
Select the axis to be traversed and
+
then press the "+" or "-" key.
The selected axis moves to the reference point.
Caution
The machine is synchronized as soon as the reference point is
reached. The actual value display is set to the reference point value.
The display is the difference between the machine zero and the slide
reference point. From now on, path limits, such as software limit
switches, are active.
You can end the function by selecting another operating mode ("JOG",
"MDI" or "Automatic").
• All axes of a mode group can approach the reference point
simultaneously (depending on the PLC program of the machine-
tool manufacturer).
• The feedrate override is active.
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