Mastercam – Cutting a big chamfer with a small tool
In situations where the chamfer on the part is larger than the chamfer on the tool, finding a simple method to make the cuts is essential. Here is one such method.
In the sample part show here, the tool cannot cut the chamfer in one pass. You can see that the chamfer on the part is much larger than the chamfer on the tool.
Follow these guidelines to create a toolpath where the tool steps multiple passes down the chamfer.
- Select the chain at the top of the chamfer.
- Make the following setting on the Cut parameters page:
a. Set the Contour type to 2d, not 2d chamfer.
b. Set the Stock to leave on walls to a negative value, using the following formula:
-sin(chamfer angle of tool) X ( ( outer tool diameter – inner tool diameter) /2)
In the above example, the values are:
= -sin(45) X ( (0.5-0.06) /2)
= -sin(45) X 0.22
= -0.155563
Key dimensions can be read from the tool definition.
- Enter the following settings on the Depth Cuts page.
a. Select the Depth cuts option and set the Max rough step as desired.
b. Select the Tapered walls option.
The resulting toolpath successfully keeps the tool on the chamfer surface.
If you have any questions with regards to “Mastercam – cutting a big chamfer with a small tool” and how it may improve your Mastercam experience, please contact your customer solutions representative or leave a comment below.
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