incorrect cutting in a pocket <cutter comp in control vs cutter comp in cad/cam>

[midy]

No i'm not disagreeing with you at all, i'm going to model a 3mm fillet into those sharp corners, change nothing else and see what happens...

[tblough]

The difference will be less, but the tool path measurement will still be smaller than the sharp corner distance minus the cutter diameter.

[midy]

So i put 3mm radius in the sharp corners and used a 4mm endmill and it just cut exactly the same size pocket as before, circa 1.5mm under size. So no change at all.

[midy]

I think I figured out for definate this is something to do with fusion. If I cut a pocket with intercon conversational, it's perfect. If I model the same pocket and use fusion g code, it cuts well under size approx 0.6mm.

[tblough]

Glad you have narrowed it down. My guess is that Fusion is set to allow a 0.3mm finish pass, and you gave not selected the option to make the finish cut. Hopefully a Fusion user will hop in and let you know where those selections are in the program.

[midy]

Maybe there is a setting i'm not familiar with but I thought that was just the stock to leave setting for finishing pass. Will keep looking.......

[suntravel]

Stock to leave or wrong mill diameter ist the only possible cause I know in Fusion.

But without the .f3d file no way I can find out whats going wrong.

Uwe

[midy]

you have it Uwe, its in the thread

[suntravel]

Ok, I remember and showed you already why on this part the measurement is about 0.5mm off...

[midy]

this also cuts under size, the other pocket which is bigger cuts approx 1.5mm under