Using a keyhole tool

[LiamN (Liam Newcombe)]

@greg5

I’m using F360 so I had to do a contour with the hacks found online. Basically add a few thou to make the slot wider then your actual tool. I then manually edit the Gcode to have the return pass at twice the speed since it’s taking off basically nothing.

In case it’s useful, I put some notes on using keyhole cutters in Fusion here

A few more thoughts on Keyhole cutters in Fusion 360 CAM

Triggered by the discussion in this thread I thought it was worth going back and re-watching a few of the handy YT videos on keyhole cutters in Fusion from NYCCNC and Portland CNC, Autodesk and others and seeing what the options are for undercutting slots in Fusion CAM. There is rarely only one way to achieve something in CAM. I started off with a sample body which had three features of interest [Screenshot 2022-01-28 at 00.01.26] There’s a slot with an undercut all around down the center…