University:
Boston University
Course:
GRS CS 910 | Directed Study: Systems
Academic year:

2022
Views:

60

Pages:

13
Author:

Dawson Thornton

5. Click the Zoom Full button in the top Toolbar to fit the geometry to the screen. The first thing we need to do is to set the wire configuration and strategy. 6. Click the Wire Configuration button . It is the top left button in the Top Level palette. 7. Enter the values shown in the dialog below. 14 8. Click the Machine strategy tab and enter the settings shown below. 9. Click the Gluestop options tab and select the Single cut radio button. 15 10. When you have finished, click OK. Now that we have set up the machine, we can begin to put a toolpath on our geometry. 11. Click the Machining button in the Top Level palette. Looking at the bottom of the screen, we can see that we are being asked to pick the profile to be cut. 12. Select the area of the middle profile as shown. The Create Wire Part dialog opens, ready for us to select the type of cut we want to make. 16 We now need to select a start point for the cut. 13. Click the Select start point button. 14. The bottom of the screen is asking for a start point. Select the approximate point shown below. It is a point outside of the profiles. You will now see a dialog displaying the coordinates of the start point. We need to set the width of the gluestop. 15. Enter the values shown below and click OK. We have been sent back to the Create Wire Part dialog to select the lower profile and the number of cuts to take. 17 16. Click the 4 axis checkbox. Also set the dialog to take four cuts, as shown below. 17. Click the Select lower profile button. 18. Select the profile as shown to designate the lower profile. When you select the lower profile, we are sent back to the Create Wire Part dialog to finish setting up the toolpath. 19. Click OK. The results of our work will look like the image below. 18 Looking at the toolpath, we probably have some more work to do, as is often the case with 4axis parts. We need to synchronize the wire path. In order to sync this toolpath, we need to break some of the elements. To make this easier, we are first going to turn on the Command repeat option. 20. Click the Configuration button in the top Toolbar to open the Configuration dialog. 21. Activate the Command repeat function and close the dialog . The Command repeat function allows us to perform the same action multiple times without having to repeatedly open a dialog and select a command. 22. Click the Edit /Modify geometry button 23. Click the Split Element button in the Top Level palette. in the Edit Geometry palette. The Split element dialog provides several ways to break geometry. 24. Select the first method—Normal to element, through a point. 19 25. Click Select line/arc. To use the Normal to element, through a point function, we must first select the element we want to split, then we select the point normal to the element. The element will then be split at this point. 26. Split the element as shown here. 1. Select this element 2. Select this point 3. Result: A split element Go through the part and split the elements in the places shown below. 20 After splitting the elements, your screen will look like the following image. While the results do look better, the part still needs some work. We need to manually sync some points. 27. Click the Sync button in the Top Level palette. Notice the bottom of the screen is prompting us to pick an element in the top profile that needs a sync point. 28. Select the points as shown in the following image. 21 After the point on the top profile is selected, the bottom of the screen prompts you to pick the sync point on the bottom profile. A line attaches your cursor to the top profile and will remain that way until the bottom sync is selected or a right-click is performed. After clicking the two points you will see that the points are now synced. We have some more syncs to add to complete the part. 29. Add syncs at each of the elements that we split. Click Redraw the following image. 22 . The toolpath will look like This is better, but the toolpath at the corners is still not optimal. We will not get clean, sharp corners with this toolpath. We will need to add syncs from some of the corners of the top profile to the rounded corners of the bottom profile. Remember each element may have two syncs. 30. Add a sync from the corners to the ends of the rounded corners as shown here. This is better. 23 The exterior corners are controlled but the toolpath is still not optimal in the interior corners. The way to fix this is to have overlapping syncs from the interior corners. 31. Create a sync from the interior corners to the split elements as shown below. This results in good toolpath. 24 32. Switch to isometric view to see the part complete with all of the skim cuts. 33. Click the Simulation button. Use the default settings, click Go to see the rendered part. 25 34. Be sure to save the part. 26

Legacy Wire EDM Tutorials 2

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