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Accuracy in Pro/ENGINEER Lane can use to modify the order of precision parts or
components. Precision parts and components is a relative size, scope for .01-.0001 valid
result, the default value is 0.0012. When you raise the attention of precision parts
(decrease relative precision values), the time will be lengthened in parts.
You can modify the distribution of documents option "accuracy_lower_bound"
changes relative to the minimum value of precision, the limits for effective 1.0000e-6 ~
1.0000e-4.
Precision parts to the value of less than the minimum margin parts and components cuboid
inclusive of the maximum margin ratio. Unless necessary, the use of default precision
normally be installed.
In the circumstances, you may need to change the precision parts :
Adding in a large parts of a very small features.
Use another law in two parts (integration or female) to produce new parts. Two parts to be
compatible sources, they must have the same absolute precision. We should use the same
absolute precision, the two components can ride on their respective size and the relative
value of precision, if the results are different, can change the relative precision parts
until the results of the same value date.
For example, the small size of the parts is 100, relative precision value is 0.01, +
(absolute accuracy) is the major parts 1; size is 1000, relative precision value is 0.01,
the product (absolute accuracy) is 10, for two parts of the same absolute precision value
may be large relative precision components for the value of 0.001.
Setup can modify parts of the relative precision > Accuracy. After the revision of the
value of precision parts will be automatically renewable.
Absolute accuracy and relative precision
Pro/ENGINEER absolute precision to identify the minimum size can (using the current system
units).
For absolute precision functions available, the system configuration can be paper option
"enable_absolute_accuracy" establishment "give a yes." Absolute
precision function allows different sizes or different parts of the precision parts (such
as the introduction of spare parts from other systems) can be combined well.
In version 17.0, all parts are used relative accuracy, and therefore when you are from a
different size parts reproduction or geometric integration when you need to use a
different absolute precision.
Under normal circumstances, you should continue to use for the majority of components
relative precision. In the following circumstances need to consider the use of absolute
accuracy :
In some operations, such as the Italian and Cutout, which operated from other parts of the
geometric model of reproduction.
Design and layout design for the manufacture of ready models.
Thanks to the geometric (Geometry) and objectives suitable for spare parts.
You can adopt the following two ways to make a group of precision parts suitable for :
They set up to the same absolute precision.
One of the parts to (usually the smallest parts) is that it gives the absolute value of
all other precision parts.
You can set up through accuracy menu to the absolute precision parts (or call resolution).
If the system configuration documentation option "enable_absolute_accuracy" has
set up as "give a yes", then there is choice system :
Relative-- a relative precision
Absolute-- installed absolute precision
Default use of the system relative precision. System configuration used documents option
"default_abs_accuracy" system can be installed default absolute precision
values. Absolute precision value will remain in effect until you change its value until
the next.
Laws absolute precision value for the use of Experts Part option from the current Session
of choice parts, and the current use of the components of absolute precision parts value.
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