Toolpath and NC Code Inconsistency

[Anonymous]

When I create this toolpath (see attached CAM file, NC Code file and images please) everything seems normal on F360. However when I created NC Code (Fanuc standard post-processor) I got confusing results. I backplotted the NC Code via 3rd party app and it shows bizarre circular patterns which is not present in F360 Manufacture interface. Any help will be appreciated, thanks in advance.

[HughesTooling · Accepted solution]

It back plots fine in both of the programs I have, try NC Corrector. Personally I would not use R as it's quite vague\fuzzy, I'd use IJK for arcs.

Mark

[HughesTooling]

Just looked at your design and the way you selected the profiles is wrong, you should select a single path for each pocket. If you select like this you get a far smaller program. Selected profile at bottom face.

Mark

[Anonymous]

I just tried NC Corrector and it shows the toolpath as it should be. I checked the toolpath with a Surfcam subprogram called editNC previously. The screenshots that I posted belongs to that program. 

I would like to learn more about IJK. How can I create NC Codes with that format? Should I change post processor options? Thanks in advance.

[HughesTooling]

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@Anonymous wrote:

I would like to learn more about IJK. How can I create NC Codes with that format? Should I change post processor options? Thanks in advance.

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Yes, on the options there should be a option Radius Arcs, set it to no. If you don't have that option what post processor are you using?

Mark

[Anonymous]

Dear Mr. Hughes,

First of all thank you for interest and kindness. I just tried to create a new NC code with Radius Arcs option is set to "No" and everything is fine now. However I set this option to "Yes" previously because some different parts' toolpaths showed straight lines where there should be arc movements and I thought that it was fault of a misconfigured post processor options. That time I used the same software for back plotting (Surfcam's editNC). I just realized that maybe that time the problem was also faulty back plotting of editNC software and not the actual toolpath itself. Therefore I would like to learn a reliable way for checking NC codes since different software provides different results. Actually this is quite shocking that I got wrong back plotting results because I always used this software to conduct a final check on my toolpaths. Thank you for your help.    

[HughesTooling · Accepted solution]

You can never be 100% sure of the code until it's run on the control software. I have some offline software for a couple of my controls and I've had a couple of times where the offline backplot doesn't match the control's backplot! Luckily the control has backplot so no disaster. Does your control have backlot?

All you can really do is back plot with a couple of programs, Nc Corrector seems quite reliable. There's also a backplot for Fusion add-in here you could try.

Mark