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4 Axis Toolpath Worked Before - Toolpath now fails to execute on HAAS with NGC

11 REPLIES 11
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Message 1 of 12
kepp.andrews
249 Views, 11 Replies

4 Axis Toolpath Worked Before - Toolpath now fails to execute on HAAS with NGC

Forum Administrator - This was posted to both support and manufacturing. Please delete from incorrect forum.

 

I previously used 4th axis rotary toolpaths and it works great. Today I tried to use a very simple rotary toolpath that cuts in either spiral or circular mode, but it is failing.

 

In The Fusion 360 Workspace:
- The simulation looks good and correct.
- The .NC file is written with no errors or warnings.
- In Post Properties, Optional Stop is not checked.

 

At The HAAS Mill:
- X & Y coordinates are read and the movements are correct.
- Z axis moves down to the part and then stops above the part before beginning the cutting toolpath.
- The rotary turns.
- The spindle turns.
- The actual cutting toolpath fails to start. The spindle stops above the part.
- There is no alarm.

 

My errors with Fusion 360 have mostly been self-inflicted. I expect this to be the same, but any guidance is much appreciated.

11 REPLIES 11
Message 2 of 12
seth.madore
in reply to: kepp.andrews

Please share your Fusion file here.

File >Export > Save to local folder, return to thread and attach the .f3d file in your reply


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 3 of 12
kepp.andrews
in reply to: seth.madore

Uploaded

Message 4 of 12
kepp.andrews
in reply to: seth.madore

More info to follow

Message 5 of 12
kepp.andrews
in reply to: kepp.andrews

The toolpath is very simple. It just moves along the length of a rod that is rotating on the X axis. Once the Y and Z coordinates are reached the only real movement is along the X axis. This is how my post looks. Z and Y axes moves are very minimal and at start of program. Just not sure why now, the Z axis is stopping above the part instead of engaging and moving along the X axis.

 

To be clear I'm reducing a .375 diameter rod by .0015 which gives me a finished diameter of .372 rod. Doing this exact same thing previously gave me an acceptable finish with less time sanding or buffing.

 

Files attached.

Message 6 of 12
kepp.andrews
in reply to: kepp.andrews

Model pics attached.

Message 7 of 12
kepp.andrews
in reply to: kepp.andrews

Video of machine and NGC running code.

Message 8 of 12
seth.madore
in reply to: kepp.andrews

And you're certain that the tool is touched off correctly? Have you verified that the WCS at the machine is correct?


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 9 of 12
seth.madore
in reply to: kepp.andrews

Because I watched the code running in your video, and the code is sending it to Z.1859, which is where it should be..


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 10 of 12
kepp.andrews
in reply to: seth.madore

Seth I spent hours yesterday getting my cheap Chinese tailstock centered to <.001.

 

Does anyone make a 10" or 12" tailstock that moves ONLY in Z and is unable to tilt in X? I'll buy it if anyone knows of one.

 

While setting the tailstock, I indicated the probe and then calibrated it. Perhaps somewhere in hours long endeavor of centering the axis of my tailstock, I didn't re-check Z height. I know X and Y are good because it ran the first operation perfecto. Dunno, but I'm about to go and confirm. I suspect it will be something like this... Like I said, I've ran similar toolpaths like this numerous times before and all was bueno.

 

I'm going to be a bit embarrassed if this turn out to be another stupid-user-trick.

 

Message 11 of 12
seth.madore
in reply to: kepp.andrews

Why do you want one that adjusts in the Z axis? That seems like a recipe for frustration...

For the rotary on my Mori, I've got a tailstock that only adjusts in and out (the screw on the tailstock to advance the quill). It bolts directly to my table, locating with a couple of keys. Most times it's just perfect the way it is. Every now and again, I'll take the front key out to get me that perfect "dead-nuts" accuracy a job may need. It's a 160mm center height, I think the tailstock was about $2.5k or so. If my rotary was on a riser, I'd just make a riser for the tailstock as well, rather than monkeying around with a Z adjustable unit.


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 12 of 12
kepp.andrews
in reply to: kepp.andrews

Stupid-User-Tricks

I haven't ran this setup in several months. Forgot to add back the radius after Z height probing.
I'll buy the book and try to stop asking stupid questions.

Machining.For.Dummies.png

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