3-15
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Alignment tolerances
The tolerances to which a tool can be set are dependent on the parallelism of the laser beam to the
machine axes.
Tool setting applications
Over a span of 100 mm (3.94 in), the following alignment accuracies are recommended:
Spindle axis (P2 – P1): ≤ 10 μm (0.39 μin)
Radial axis (P2 – P1): ≤ 1 mm (0.039 in)
These values are sufcient for the majority of tool setting applications.
Tool breakage detection applications
Over a span of 100 mm (3.94 in), the following alignment accuracies are recommended:
Spindle axis (P2 – P1): ≤ 0.2 mm (0.008 in)
Radial axis (P2 – P1): ≤ 1 mm (0.039 in)
These values are sufcient for the majority of tool breakage applications.
P1
P2
Spindle axis
Beam
axis
Radial
axis
NOTE: For best measurement performance, Renishaw recommends aligning NC4 units using a ball-nosed
cylinder-type calibration tool. A mobile app (NC4 app) is available for step-by-step instructions on NC4 unit
alignment (for more information, see page 3-10, “Machine tool apps”).