Tolerance Types; Bidirectional; Points; Lines - HEIDENHAIN ND 1300 Operating Instructions Manual

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QC-300 Series User's Guide

Tolerance types

As mentioned earlier, the method of applying tolerances to features is nearly identical for all tolerances.
This section describes the tolerance screen for each tolerance type. The following tolerances can be ap-
plied to feature measurements:
• Bidirectional • True position • MMC • LMC
• Runout • Roundness • Concentricity • Straightness
• Parallelism • Perpendicularity • Angle • Width

Bidirectional

Bidirectional tolerances can be applied to points, lines, circles, arcs, slots and rectangles.

Points

The tolerance screen for points is used to specify the acceptable deviation from a nominal position in the
X, Y and Z axes. The bidirectional tolerance compares the measured location of a point to the nominal
location of the feature's center point.
Enter the nominal values into
the X, Y and Z axis data fields
provided. Enter the allowed
limits into the Limit data fields
as +/- ranges or as absolute lim-
its. Touch the Limit data fields
to toggle between +/- ranges or
absolute limits.

Lines

The tolerance screen for lines is used to specify the acceptable deviation from nominal positions in the X
and Y axes. The bidirectional tolerance compares the measured location of the center point of a line to the
nominal location of the line's center point.
Enter the nominal values into the
X and Y axis data fields. Enter
the allowed limits into the Limit
data fields as +/- ranges or as
absolute limits. Touch the Limit
data fields to toggle between +/-
ranges or absolute limits.