As you can see, this is a simple, smooth way of changing the height of the
"`I`" beam as it is swept along it's trajectory.
The unfortunate part about using such an equation is that to modify
the values of the height of the beam, (the 1.25 or the 0.5 in the equation) you must
go to the proper **RELATIONS** menu and **EDIT REL**ations. If this is bothersome you could
write a Pro/Program which requests the information with each regeneration ...
or ... *USE THIS TRICK !*
Just prior to the feature to be driven, insert a datum curve containing the dimensional
values you wish to use as modifiable constants in the equation. Figure 2 shows the
datum curve inserted, with it's dimensions shown in symbolic form. The corresponding
equation controling the feature is:
`sd7=D15-(D15-D14)*trajpar`
Where `d15=1.25` and `d14=0.75` -- the "`I`" heights at the beam ends.
Notice that the symbolic values of the datum curve dimensions have been substituted
for the constants in the previous equation. In this way, the datum curve can be
easily changed using **MODIFY**, thereby changing the sweep without editing the relation. |