When we have undercuts on the workpiece, the conventional tools can't be machined, and the customer asks us to deal with them. So, how do we create a proper toolpath for undercuts?Next, I will share with you how to do it. Here's how to do it:
As shown in the figure: The position indicated by the arrow in this figure is the undercut, which needs to be machined with a T-cutter, and the width and height of the undercut are given in the red box.
1.First of all, in the PowerMill ribbon, find the Cutter - Create Corner Disc Cutter.
As shown in Fig;
2.Open the interface of creating a tool, enter the diameter of the tool 8mm and the length of 2mm, and create the shape of the cutterhead.
3.Click [Shank] to create a 4mm shank shape.
4.PowerMill Explorer finds the guide and right-clicks [Create Guide].
5.Select the arrow and right-click on the No. 1 guide you created to get it.
6.As shown in the image below, the peripheral guides are deleted, leaving only the bottom inverted line segment.
7.Create a machining strategy on the tab, select the [Curve Machining] interface, and find [2D Curve Profile] to confirm.
8.In the machining strategy, click [Curve Profile] - the curve is defined as No. 1, the lower limit is specified to the depth plane that the tool needs to machine, and the position is selected as tangent.
As shown in Fig;
9.Click [Interactive Modification of Machinable Section] to determine the machining side of the tool.
10.Click [Cutting Distance] to set the horizontal layering, enter 1mm for blank width and 0 for line spacing1mm, set the row spacing according to the tool.
11.Click Offset, Spiral to Close
12.Click High-speed --- to change the connection to none
13.Click Cut In ---Set as shown below].
14.Click Connect ---set as shown below] and calculate.
15.As shown in the figure below, our undercut program is edited.