Fusion
Hello cam friends, I have this part I'm working on that I'm trying to lay some of my first 5 axis toolpaths down on and I'm having quite a hard time wrapping my head around 5 axis in fusion.
Would someone be willing to download the f3d file for this part and drop a toolpath on it that will cut these contours correctly? Being able to interrogate the provided toolpath would help me immeasurably if anyone's got a sec.
Bonus points for a 4th axis limited path (in a VMC orientation) as that is how I will be attempting to cut this geometry.
Much appreciation in advance.
Closest I can get to 5 axis
Not sure if this is worth anything but idea is to cut blank on lathe including groove, mount it in 4th axis and machine back side by interpolating A axis.
With open slot at A0 and in line with Z axis, machine front side.
I coordinated axis in both setups to same point and direction, XYZ zero is center line and part face.
I added finish tool to back contour and limited tool path to cut only required section, also removed stock left in axial direction to blend tool path with groove done on lathe..
I should have done this in same setup but because I split body to contain tool path in front setup I decided to separate the two.
I am not yet fully comfortable with components so I work within my boundaries, if someone can build on this and show better way, it would be a bonus.
In recent weeks I was told that in 4th axis work, simulation is off by 1 degree in Y axis but actual result at the machine should be good so walls will be strait, not tapered as shown in simulation.
In my first post, I am doing something that would not add up in real world, using toothpick ball EM extended out too far to clear part, only looks good in theory.
So, in on going effort to gain some more knowledge in mill work, I came up with new scheme which I believe is good way to get it done.
XYZ zero is center line and face of finished part, front and back using A axis wrap, slot done at A0 and 3D work.
My ears and eyes are open for any input from people doing intricate mill work.
Walls will be perpendicular when the face of said wall is co-planar with the Y axis,
Walls will not necessarily be perpendicular when co-planar with the X axis (because of the A axis rotation)
I believe this is why the rear face is overcut slightly, tool is always pointing to centerline so when you rotate A the wall angle changes.
If the swarf toolpath can be limited to fourth axis properly and the tool can step over and down the side of the cylinder in Y I believe this can be eliminated.
This is what I'm talking about, and if you look at the part I provided top-down it looks like the part on the left, the walls are parallel to the Z axis, as soon as you rotate the part in A the walls are no longer vertical like the part on the right.
What I'm describing about changing directions can be seen in the corners of the part on the right in the top down view, the walls on the y axis are straight up and down, the walls in the X axis are tapered and the transition between Y and X you sort of end up with a kind of lofted shape.
As soon as you rotate the A axis you are losing perpendicularity unless you can step over in Y which is what swarf limited to 4th axis should be able to achieve.
When you split the body at an arbitrary angle through the centerline chopping the tip off those contours you can clearly see the problem.
Still, as far as the front contour is concerned, you can still hit that angle with XYZ-A only.
Say you place a ball endmill tangent to that fillet and hold it there in space, now rotate your A axis and have the rest of the machine follow keeping that ball coincident with the same point, at *some* angle of A axis rotation the wall *will* match up. Going to try and demonstrate this..
