Back chamfer

[Anonymous]

We machine gland as shown on the screenshot attached.

We want to back chamfer the edge of the bottom of the bore and the top edge of the groove.

We use a back chamfering tool similar to the one attached.

I cannot figure out how to define this operation in CAM.

I would greatly appreciate help on this.

Thank you in advance

[LibertyMachine]

The best way would be to use a custom tool profile, which Fusion does not yet support. 

That leaves you with only 2 options, but the first does require some math....

As long as you know the distance to the centerline of the tool, you can use that information and program accurately, I've done it more than once. Not the most fun way of doing something, but it works.

The other method is to use 2 tools in Fusion. One will be a dovetail cutter and the other a standard chamfer mill, or even the one that I've depicted above. If they share the same number, the code will be output as one tool, so you can then go about using the DA cutter that you would like.

[Anonymous]

 I figured that a little math with my back chamfer tool will do the trick.

However, I just can't get Fusion to generate a toolpath whenever I setup a chamfer operation inside the bore. I get several warnings.

I have attached the F3d file for this operation.

Would you help with this configuration issue?

Thank yo in advance.

[LibertyMachine · Accepted solution]

Personally, I'm no fan of the Chamfer button. I find that in most cases, I've got better control over my toolpath with 2D Contour. If you choose 2D Contour and select a Chamfer mill, it automatically clicks the radio box on the Passes tab to define chamfers.  

The ONE place where I've used the Chamfer button is when I have posts or any other surface that I really need to avoid. Much quicker that way than guessing around with 2D Contour.

Take a look at the attached file. It should be close to what you are looking for. Again, personally speaking, I'd run cutter comp (if your machine allows it) so I can tweak as needed.

[Anonymous]

Thank you for your help.

I will use 2D contour for those chamfers.