T-FLEX Parametric CAD. Fundamentals. 2D Design

The example presents a kinematic system of a
generic belt drive. Let's assume one of the
requirements for the design of the system being
the fixed belt length (1000 mm), adjusted by the
position of an idler. The idler position depends on
the angle of turning its mounting bracket.
The turning angle of the idler mounting bracket is
defined on the drawing by the parameter of the
respective construction line created as "through
node, at an angle to horizontal". This parameter
of turning the construction line was defined by a
variable named “alpha”. The length of the belt is
defined by the variable “Length”.
Let's define the optimization task for this model
by calling the command “PO: Optimize
Model”.
The target condition will be the equality: the
variable “Length” is equal to 1000 mm with the
tolerance 0.0001.
Let's set to the variable “alpha” to be the target of
the optimization, with the values ranging from
0
0
45 to 225 .
Optimization
In this example tension
roller ensure belt length
1000 mm. Optimization
work automatically after
transform construction line
Belt length: 1000 mm
Alpha: 125.348°
There are no additional conditions on the variable
in this model, therefore, no restrictions are
applied.
Let's set the optimization run condition “On
optimal Model Regeneration”. In this way, any
model modifications will trigger the optimization,
making it work in “transparent” mode. Let's set
the dichotomy method as the optimization
algorithm.
Upon defining all optimization parameters, any change in the drawing will trigger the optimization. For
example, moving any of the rollers or changing any radius requires running the optimization to define the
position of the idler. Meanwhile, the belt length is maintained equal or nearly equal to 1000 mm.
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