Heidenhain MANUALplus 4110 User Manual Page 27

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HEIDENHAIN MANUALplus 4110 27
1.5 Machine Reference Points
1.5 Machine Reference Points
Machine zero point
The point of intersection of the X and Z axes is called the "machine
zero point." On a lathe, the machine zero point is usually the point of
intersection of the spindle axis and the spindle surface. The machine
zero point is designated with the letter "M" (see figure at upper right).
Workpiece zero point
For machining a workpiece, it is easier to reference all input data to a
zero point located on the workpiece. By programming the zero point
used in the workpiece drawing, you can take the dimensions directly
from the drawing, without further calculation. This point is the
"workpiece zero point." The workpiece zero point is designated with
the letter "W" (see figure at center right).
Reference points
Whether the control "forgets" the positions of the machine axes when
it is switched off depends on the position encoders used. If the
positions are lost, you must pass over the fixed reference points after
switching on the MANUALplus. The control knows the exact distance
between these reference marks and the machine zero point (see
figure at lower right).
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