HEIDENHAIN IK 5294 - Manual (Page 171)

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6
Tolerancing
Tolerance types
The methods of applying tolerances to features described earlier are identical for all tolerances and feature
types, only the required tolerance data changes from featured to feature. This section describes the toler-
ance (data) entry screen for each tolerance type. The following tolerances can be applied to features:
• Bidirectional • True position • MMC • LMC • Runout
• Circularity • Concentricity • Straightness • Profile
• Parallelism • Perpendicularity • Angularity • Angle • Width
Bidirectional
Bidirectional tolerances can be applied to points, lines, arcs, circles and slots.
Points and lines
The tolerance entry screens for points and lines are
identical, and are used to specify the acceptable devia-
tion from nominal position in the X and Y axes. The
bidirectional tolerance compares the measured location
of a point or the center point of a line to the nominal
location of the feature’s center point.
Enter the nominal (-) and nominal (+) values into the X
and Y axis data fields provided and then click OK.
Arcs and circles
The tolerance entry screens for arcs and circles are
identical, and are used to specify the acceptable devia-
tion from nominal position in the X and Y axes, and
from the nominal radius. The bidirectional tolerance
compares the measured location of the center point of
the arc or circle to the nominal center point and com-
pares the measured radius to the nominal radius.
Enter the nominal (-) axis, nominal (+) axis and nomi-
nal radius values into the data fields provided and then
click OK.
Tolerance Types
6 Tolerancing OE.indd 7 5/9/2005 9:51:47 AM