|
|
EZCAM Help |
|
|
EZCAM Help |
Whenever boundary curves are used, the Start On parameter must be set correctly for the current situation. The Start On parameter, in general, determines whether the cutter is machining the inside or the outside of a closed curve. The location of the curve is important also, in setting this parameter correctly. If the closed curve lies so that the start point of the surface (the point with the two small red arrows) is included in the region inside the curve, the setting of the Start On parameter is effectively reversed from the normal situation.
In some situations, the setting of the Start On parameter may be very ambiguous. If the start point of the machining surface is closer to the boundary curve than the radius of the tool, the setting of Start On may not have the desired effect on the tool path. In this case, it is best to move the start point of the surface to a different location, using the Change Start Point command, found in the Surface menu.
Click here for graphic Example
Here's an example of surface areas that will be machined if you select the Start On feature. The first surface point is P[0,0].
|
Start On = ON |
|
|
If you do not select this feature, the entire machining sequence is reversed.
|
Start On = OFF |
|
|
Here's an example of the boundary specification using Check Curves. Closed curves may be nested (inside of each other), but contradictory situations such as the intersection of two curves must be avoided.
