4th Axis and Fusion 360 setup

In the design workspace I made a cylinder and put a hole through it (using the cylinder and hole tools, no sketch needed), moved to manufacture and new setup. Set the stock WCS to the centerline at one end, then added two drill ops using a random drill in my library– the first drill op was at the original WCS, selecting the top of the hole, then the second drill op used the tool orientation option to only tick the ‘flip Z’ button. Selected the other end of the hole for the geometry and hit ok with all the other stuff just defaults (no machine selected in the setup). Posted it with Tormach PP Post (#44024 although I don’t think that matters much) and got the A0 moves. Maybe try copying that just in case there’s something in your geometry that is annoying Fusion. Should only take a few minutes.

I don’t have any of the 4th options even visible anymore.

2nd op, after ticking Flip Z and selecting the other end of the hole.

%
(1002)
(T125 D=0.1495 CR=0. TAPER=118deg - drill)
G90 G54 G64 G50 G17 G40 G80 G94 G91.1 G49
G20 (Inch)
G30

N10(Drill1)
T125 G43 H125 M6
(25 drill)
S5000 M3 M8
G54
G0 A0.
G0 X0.228 Y0.
G0 Z1.1
G0 Z0.7
G98 G81 X0.228 Y0. Z0. R0.7 F20.
G80
G0 Z1.1
G30

N20(Drill2)
S5000 M3 M8
G0 A180.
G0 X0.228 Y0.
G0 G43 Z1.1 H125
G0 Z0.7
G98 G81 X0.228 Y0. Z-0.5 R0.7 F20.
G80
G0 Z1.1
M5 M9

G30
G0 A0.
M30
%

2 Likes

Awesome Roy.
First, thank you for following along and helping me out. It is much appreciated.

I will give this a try in a little while.

Well…. that worked Roy. Now I will need to try it out on that saddle part.
Thank you again!

Cool. I spent a long time trying to get Fusion to do what I wanted WRT the 4th axis, so happy to help someone else along a bit.

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When you post out the operation for the second drilling op just search the NC file for an A180. That will tell you if it’s moving to the other side or not. If A180 isn’t there search for A0, if it’s A0 then the setup in fusion isn’t correct.

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One other issue is that I believe my WCS is not set up correctly. I was on the Fusion Cam Facebook group, and David Loomis (from Xoomspeed I am assuming) pointed out to another user that the WCS needs to be in the center of the workpiece for 4th axis operations.
Also, I noticed that the Xoomspeed post-processor inserts a Z#5183. I have read some about this, but don’t fully understand it. It seems that the Z#5183 command is a way to make the z-axis move to “home” position in this instance. But, is the Z#5183 defined from the previous operation? I notice it says “Retracting new work plane - g30z”, I am not sure what that means exactly. If my WCS is in the middle of the part, will it “retract” to the middle of the part (ie. crash)? I guess I can load the program on the Tormach and do an “air cut” to see where it ends up.

SUCCESS!! SUCCESS! SUCCESS!!

Thank you everyone for your help. As with most things, learning the basics of whatever you are doing and developing that baseline understanding is the key to success.
I’m sure that I will still have a “few” more questions. :wink: :upside_down_face:

1 Like

Neil,

This is true for any simultaneous 4th toolpaths, but not for indexed 4th operations.

Parameter #5183 is the value of the G30 position for the Z axis. “G30 Z#5183” is equivalent to having the “G30 move in Z only” checkbox on the Settings page checked so I’m not sure of the usefulness of calling it out that way.

Thank you,

Norman