A 6 mm ball mill is used for the finishing toolpaths, but the fillets between the base and bosses have a radius of 4 mm. Parallel Pencil passes are used to machine the fillets.
- On the ribbon, click
CAM tab
3D Milling panel
Pencil
.
Tool tab
- On the Tool tab, click the
button. - Select the tool #21 - Ø6 mm ball from the Tutorial4 library.
- Click
to close the Tool Library dialog.
Passes tab
- Click the Passes tab.
- Set Overthickness: to: 1.2 mm Note: The Overthickness parameter is used by Inventor CAM to generate pencil passes where they would not exist for the specified tool. Here the tool radius of 3 mm is smaller than the fillet radius of 4 mm. With Overthickness set to 1.2 mm, Inventor CAM generates the pencil passes for a larger tool radius, and uses them to guide the smaller tool into the fillets.
- Set Stepover: to: 0.3 mm
- Set Number of stepovers: to: 5
- Enable the Stock to Leave check box.
- Set Radial stock to leave to: 0.05 mm
- Set Axial stock to leave to: 0.05 mm (this value should update automatically)
Start the Calculation
- Click
at the bottom of the Operation dialog box, or right-click in the graphics window and select OK from the marking menu, to automatically start calculating the toolpath.
The toolpath is now calculated and a preview appears in the graphics window.
Continue to To Finish the Part...