Tool path shows arc but results in stepped corners in simulation preview and actual machining

[Anonymous]

Hello all and I hope someone can help me. No matter what I adjust, how many videos I watch or help topics I read I can't seem to find a solution to my issue.

My contouring tool paths are generating with a smooth arc movement around my outter corners as seen in the simulation preview but the model shows steps being made around the part instead of the smooth tool path that is tracing it. This stepping around of the model also shows up when machining the actual part as well. When creating my NC programs I also select circular interpolation to post. 

When running the programs, machining sounds good and no chatter. Spring passes are also enabled and the final pass is quiet and uneventful. I have included the f3d file and a photo of the part

Thanks for any help

[seth.madore]

What post processor are you using, and what is your control?

[Anonymous]

Hi Seth and thank you for the reply.

The post processor I am using is onefinity. I am also running their controller as well. 

[seth.madore]

It appears that the post processor is not configured to allow arc moves on any plane. Can you confirm that your controller DOES support arc moves along the G17 (XY) plane?

[Anonymous]

Yes the controller allows for this. I have done some digging and it sounds as though the newest firmware addresses this issue from what I can tell. Also would adjusting minimum chord length and minimum circular radius help (picture attached)?

The other question I had was in regard to the model showing stepped corners in the simulation preview. Does this have anything to do with the output Code or no?

[seth.madore]

If you are using the post processor from the HSM Post Library, it's still not setup to allow arcs to be output. A quick post edit will fix that:

allowedCircularPlanes = 0; // disable all circular interpolation

 Change the 0 to a 1

Another note; Adaptive is a Roughing toolpath, not a Finishing. You will have poor finish on your walls if you don't leave any radial stock

And no, the settings you show will have no impact on you until you make the edit needed