Curves được hấp thu vào các tính năng khác rất khó khăn để làm việc với. Nói chung, bạn cần phải lựa chọn từ FeatureManager làm bất cứ điều gì ở tất cả với họ. Ngoài ra, nếu bạn cần tham khảo một kết thúc của một đường cong hấp thụ, bạn tốt hơn bằng cách sử dụng Chuyển đổi Các đối tượng để làm cho nó thành một thực thể phác thảo. n | Part II Building Intelligence into Your Parts FIGURE FIGURE Rolling back to just after the spiral 428 Chapter 11 Editing and Evaluation 5. Try to draw a horizontal line from the outer end of the spiral. You will notice that you cannot reference the end of the spiral. Tip Curves that are absorbed into other features are notoriously difficult to work with. Generally you need to select them from the FeatureManager to do anything at all with them. Also if you need to reference an end of an absorbed curve you are better off using Convert Entities to make it into a sketch entity. 6. Notice that you cannot select the spiral from the graphics window. Even when selected from the FeatureManager it appears not to be selected in the graphics window. Ensure that it is selected in the FeatureManager and then click the Convert Entities button on the sketch toolbar. 7. Draw a horizontal line from the outer end of the spiral and dimension it to be three inches long as shown in Figure . FIGURE Preparing for the Fit Spline 8. Select both the converted spiral and the line and click Tools C- Spline Tools Fit Spline. Set the Tolerance to .1 and make sure that only the Constrained option is selected. Click OK to accept the Fit Spline. Test to make sure that a single spline is created by moving your cursor over the sketch to see whether the whole length is highlighted. Note The Fit Spline feature fits a spline to a set of sketch entities within the specified tolerance. It can be a useful tool for smoothing out sketch geometry. .
