Internal wrap for 4th axis part

[CHAY.HOBSON]

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

[seth.madore]

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.

[CHAY.HOBSON]

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

[jswickJ9PWC]

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.)

[CHAY.HOBSON]

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

[seth.madore]

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

/facepalm

[CHAY.HOBSON]

Everyday's a school day! 😀

[seth.madore]

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?

[CHAY.HOBSON]

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

[CHAY.HOBSON]

 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. 

[seth.madore]

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)

[CHAY.HOBSON]

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

[seth.madore]

It's in Preferences:

 

[jswickJ9PWC]

Turn it on in your preferences under "preview features"

[seth.madore]

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

[CHAY.HOBSON]

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...

[CHAY.HOBSON]

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. 

[CHAY.HOBSON]

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. 

[seth.madore]

What post processor are you using?

[CRANDALLPRECISION]

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