HEIDENHAIN IK 5494-2D - Manual (Page 133)

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4
Probes
The bottom-left corner is then selected and used to create a preliminary datum zero.
Find and teach precisely located features
Now that the preliminary skew and datum are established, each of the two fiducials required for a precise
skew and datum can easily be found within a field of view area at the system’s lowest magnification.
The programmer moves the stage to posi-
tion the first fiducial at the left side of the
printed circuit board under the video cam-
era. The pattern probe is then positioned
over the fiducial, re sized and taught the
fiducial pattern.
The Circle probe is then positioned over the
fiducial and fired to return a point at the center of the fiducial at the left side of the board.
The programmer moves the stage to posi-
tion the second fiducial at the right side of
the printed circuit board under the video
camera. The pattern probe is then posi-
tioned over the fiducial, re sized and taught
the fiducial pattern.
The Circle probe is then positioned over the
fiducial and fired to return a point from the center of the fiducial at the right side of the printed circuit
board.
The bottom-left corner point selected... and used to construct a preliminary datum zero
The preliminary datum is created at the bottom-left corner
and used to construct a preliminary datum zero
Video Probe Descriptions