Rough surface finish

[davidp_8282]

Hey guys,

I'm fairly new to Mastercam and have been having issues with the surface finish. I ran a Dynamic Mill on a pocket cut leaving 0.01mm on the walls.

After I Contour the walls to do a finishing path but I can't figure out why it's not getting all the surface area.

Also I notice in the corners the surface finish is rough after Contour. Any tips on how to create a smooth surface finsih?

[Colin Gilchrist]

4 hours ago, davidp_8282 said:

Hey guys,

I'm fairly new to Mastercam and have been having issues with the surface finish. I ran a Dynamic Mill on a pocket cut leaving 0.01mm on the walls.

After I Contour the walls to do a finishing path but I can't figure out why it's not getting all the surface area.

Also I notice in the corners the surface finish is rough after Contour. Any tips on how to create a smooth surface finsih?

When you rough, you should be leaving more like 0.2-0.5 mm for your Stock to Leave. 0.01mm is 0.0004".

If you are asking why your Graphics don't look good, that is much different from "my toolpath isn't leaving a good finish on the actual part".

Are you using the Toolpath Filter?

Every path should be filtered, and I find that most Programmers don't even know that Arc Filtering even exists.

I'd use 0.1mm Tolerance for Roughing. Split 50/50% on "cut tolerance" versus "filter tolerance". (For Roughing > Total Tolerance should be 10% of your Stock-to-Leave Value. So if you leave 0.5mm on the walls, you should use 0.05mm tolerance, split 50/50 between Cut and Filter.)

For Finishing, I'd use 0.01mm Total Tolerance, with 10% for Cut Tolerance, and 90% for Filter Tolerance.