topic Re: Internal wrap for 4th axis part in Fusion Manufacture Forum

Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 12:36:43 GMT

I am trying to create a toolpath that will mill the internal semi circle on the bike stem part. I can do it with the part stationary using a parallel or scallop but I want the 4th axis to rotate as well as the tool moving. When I try and use a 2d path and wrap it tries to wrap the outside of the cylinder and machine from the wrong side.

Any help would be greatly appreciated

I'm using a HAAS VF1 with a HRT160 4th axis fitted with a 5th axis vice

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 12:47:04 GMT

Nope, not possible at this point in time, unfortunately. It's been asked for before, but as of yet, it's not something that's available.

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 12:49:01 GMT

Thanks Seth! It seems like the easiest and most useful thing! I'll stick to the ball tool from 6 separate angles.

Re: Internal wrap for 4th axis part

jswickJ9PWC — Tue, 22 Feb 2022 13:12:57 GMT

Have you tried using Flow with the "multi-axis" capability engaged? I've had good luck with that getting 4 axis toolpaths to do what you want (at least what I think you want.)

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 13:43:30 GMT

Looks like it works! I'll try it on the machine. Thank you!

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 13:44:39 GMT

Well darnit, totally forgot about the 4th axis limit in Flow

/facepalm

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 13:46:02 GMT

Everyday's a school day! 😀

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 13:51:17 GMT

Hmm. 4th axis limit turned on gives me really poor results, and turning it off yields very small B axis moves. What results did you get, and what settings did you use?

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 13:57:09 GMT

I have attached the file here. It won't let me post process as the direction is not supported!

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 14:15:17 GMT

with BetaMode turned on I have no option to restrict to 4 axis in the flow toolpath. Even though the path I've created remains 4 axis it won't let me export to HAAS pre NGC 4th axis as the it thinks the toolpath is 5 axis.

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 14:22:46 GMT

That's because it is a 5 axis toolpath. The option for 4 axis limiting shows up on the Geometry tab of the toolpath (no clue why they put that there)

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 14:29:15 GMT

I don not have the option to restrict to 4 axis.

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 14:33:32 GMT

It's in Preferences:

Re: Internal wrap for 4th axis part

jswickJ9PWC — Tue, 22 Feb 2022 14:33:45 GMT

Turn it on in your preferences under "preview features"

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 14:45:00 GMT

Alright, I chatted with one of the developers and found the solution (regarding why I was getting crappy results in 4 axis).

You need to set Tool Orientation like this:

Sample file is attached

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 16:14:08 GMT

Thank you for all your help and patience! I am now 95% there. Just one last issue. It seems no matter what I try it cuts the toolpath short (as in doesn't climb to the top of both sides) I've tried creating a new toolpath from scratch but it does the same...

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 16:27:26 GMT

I changed my set up WCS to the centre of part and it's all good now in simulation. It still won't let me post process the code.

Re: Internal wrap for 4th axis part

CHAY.HOBSON — Tue, 22 Feb 2022 17:02:42 GMT

I've done everything the same and it just won't let me output the code. I've even gone back and orientated the model the same as yours. I've put my file here. I would be grateful if you get a chance to have a look at it.

Re: Internal wrap for 4th axis part

seth.madore — Tue, 22 Feb 2022 17:34:09 GMT

What post processor are you using?

Re: Internal wrap for 4th axis part

CRANDALLPRECISION — Tue, 22 Feb 2022 17:34:09 GMT

My haas a axis pre ngc posts the 4axis limit path