This function simulates
reflection model illuminated by several tubular light sources that are parallel
distributed on one plane. The formed zebra strips on the model surface are used
to visualize the smoothness of the surface.
Function Control Window is shown
in Figure
5.4.1. After entering this function, light strips are
automatically shown on the model surface. The initial light source plane is the
global X-Y plane. The reference point of the plane is located on the positive Z-axis
direction at the center of the model. Light source width and spacing are
automatically set according to the model size. The user may adjust the number,
direction, width and spacing of light source to achieve different zebraing
effect. The display result is shown in Figure
5.4.2. Light strips are distributed more straightforward
and even on the smooth region of the model. In the curved region of the model, light
strips are deflected and are distributed unevenly. The degree of deflection is in
direct proportion to the local curvature variation in the model. A non-smooth
or non-uniform light strip usually indicates a surface defect in the part. A
dynamic display of the light strips moving across the part will help the user
to detect surface defects. Figure
5.4.3 shows a surface defect detected by a light strip.
Once the surface defect is found, the user should use the Stoning function to
investigate the magnitude of the defect.
Figure 5.4.1 Face Reflection Control Window
1.
LIGHT SOURCE PARAMETERS
l ORIENTATION
Set the axial direction for light
source. There are three options: X, Y and User Defined. The default setting is
X. X and Y indicate that the axis direction of the light tube is set at global
X and Y direction. After selecting User Defined, the user may drag the mouse up
and down to rotate the light tube in its plane. Left click or right click the mouse
to confirm the result and exit.
l NO. OF STRIPS
Set the number of strips. The
default number is 10.
l STRIP WIDTH
Set the strip width.
l SPACING
Set the strip spacing.
Figure 5.4.2 Face Reflection Result
Figure 5.4.3 Surface deflect detected from light strip
2.
STRIP CONTROL
l AUTO FILL
Select this function to
automatically reset the width and spacing of the light tubes according to the
current model size and light tube plane position to make strips evenly
distributed on the model face.
l SHOW LIGHT STRIP
Select this function to re-plot
the current examination result.
l MOVE LIGHT STRIP
This function allows the
user to drag the mouse to move the light strip. Left click or right click the mouse
to confirm the result and exit.
l CHANGE LIGHT
DIRECTION
This function allows the
user to adjust the direction of the light source plane. The light source plane will
dynamically rotate about the model center by moving the cursor up and down, and
the rotation axis is the axis of the light source. Left click or right click the
mouse to confirm the result and exit. If the main part of the model is not
located on the global X-Y plane, the user may use this function to adjust the
light source plane to a desirable position.
l REVERSE CONTRAST
Select this function to
reverse the color of the light and shade region.
l CRISP EDGE
Select this function to
crisp edge the light strip. This option is only available when the number of
light sources is set equal to or less than 14.
3.
FRAME
List all the frames
information of the current model. If the user clicks one frame, the program
will re-plot the current model and reflection result according to the model in
this frame.
4.
EXIT
Exit the function.