HEIDENHAIN ND 1200R - Manual (Page 29)

ND 1200R Radial 29
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Establish a datum
A datum can be created from a probed point, the center point of a
probed hole or a point created from the intersection of the skew
alignment line and another line perpendicular to the skew alignment
line.
Setting a datum from a probed point
To set the datum from a probed point:
 Press DATUM>ZERO>XY.
 Probe the desired location of the datum.
Setting a datum from a skew line
The first point of a skew line is automatically set as the datum. The
datum is most commonly created from a point that is the intersection
of the skew alignment line and a second part edge line.
To set the datum from a skew line:
 Perform a skew alignment.
 Press DATUM>ZERO.
 Press the soft key for the axis to zero along (the same axis used for
the skew line).
 Probe a point on the part edge perpendicular to the skew line. The
datum is now set to the intersection of the skew alignment line and
the probed part edge.
Setting a datum on the center of a hole
The center of a hole is found by probing a minimum of three points on
the edge of the hole.
To set the datum from the center of a hole:
 Press DATUM>ZERO>HOLE.
 Probe a minimum of three points around the edge of the hole.
 Press the FINISH key.
A skew is performed along the bottom and a point is
probed on the side perpendicular to the skew line
1 2 3
4
A minimum of three points is probed around the edge
of a hole
1
2
3
Distributing the probed points evenly around the
circumference of the hole will provide a more accurate
placement for the center of the hole.