Development of a Sigmund kinematic assembly build analysis model follows an intuitive, step-by-step methodology that includes
the following stages:
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Component Geometry Creation:
Model geometry can be exported from CAD system as Part/Assembly data (wire frame or surface), or as IGES, STEP data
(wire frame or surface). The entities that can be exported into Sigmund ABA Kinematics are - CAD geometry, planes, lines, points,
axis, and coordinate systems.
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GD&T or Tolerance Emulation:
This step defines the component variation to be modeled. Tolerance information including the component GD&T datum
structures and geometric tolerances in the CAD system must be reapplied to the relevant features using the functionality provided
in Sigmund ABA Kinematics. Simple, menu-driven commands are used to define the datum reference frames, and tolerance feature
control frames are simply filled as shown on the drawing. The capability to emulate dimensional or ±
tolerances if GD&T has not been used also exists in Sigmund ABA Kinematics.
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Joint Creations:
This step defines the relative motion constraints between two piece part components. Simple, menu-driven commands are
used to define the different types of joints between two components. The capability to create a joint while assembling two parts also
exists in Sigmund ABA Kinematics.
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Optimization:
Using the output from the Sigmund ABA Kinematics model, the design of mechanisms can be evaluated, optimized and
validated throughout the range of motion even before a single part is manufactured. At this stage, different design concepts,
locating schemes and assembly methods can be evaluated. Potential manufacturing processes and the resulting capabilities can
be assessed. Tolerances can be tightened to meet the requirements or loosened if they are found to have little impact on the
requirements.
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