12
Qualifying the L-702 Laser Beam to a Spindle AOR
In spindle alignments on lathes and turning centers, it is important to ensure that the L-702 laser beam is aligned, or
qualified, to the axis of rotation (AOR) of the spindle. This is so the alignment of the headstock to the machine’s
guideways can be checked.
This procedure describes how to align the L-702 to the spindles AOR.
The NORMIN Method
The NORMIN method is a way of canceling mounting errors. The word is a contraction of “NORMal-INverted,” which
briefly describes the method.
To take NORMIN readings, the laser and target fixtures are set in the NORMal position (cable down or switch panel
facing toward you) and the readings recorded. Then the laser or target fixture is rotated 180 degrees to the INverted (cable
up or switch panel facing away from you) position and a second set of readings obtained. With a quick calculation, the
two sets of readings are averaged to cancel out both laser and target mounting errors (center and angular) and provide a
very accurate result. For a complete discussion of the NORMIN method, see Appendix A, beginning on Page 26.
Figure 12—Taking NORMIN Readings
To qualify a laser, error correction readings are taken to cancel out mounting and other errors, and Lathe9 calculates
Set
Points
. The laser beam is then adjusted to the
Set Points
, making it parallel to/coincident with the desired axis of rotation
A computer program such as Lathe9 calculates the
Set Points
for the user and zeroes the display at that point. The user
then adjusts the laser beam to zero.
NORMIN Reading
Laser NORMal,
Target NORMal
NORMIN
Reading
Laser INverted,
Target NORMal
Summary of Contents for L-702
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