Need Help!- radius 3d tool path in v22 ?

[hall6ppc]

Hello, I have been having a problem with my 3d tool paths in v22. It seems when I try to generate a tool path on a part that has a fillet the tool path does not seem to follow the contour correctly. I have attached a picture of a simple part that has a .1 radius . The tool being used is a .250 ball end mill from tool tip. I have even generated the tool path with a small .001 step over just to see if it would help follow the contour better. However it looks like to me it is still wrong. What could I be missing?

PS I have tried all the 3d tool paths in v22 and they seem to do the same thing.

Thanks for any help!!!

[HMB3000]

Originally Posted by hall6ppc ...a simple part that has a .1 radius . The tool being used is a .250 ball end mill from tool tip.... However it looks like to me it is still wrong. What could I be missing? Thanks for any help!!!

What you could be missing is that you can't cut a .1 inside corner raduis using a tool that has a .125 side raduis...Try either a smaller tool or a bigger raduis

[hall6ppc]

Originally Posted by HMB3000 What you could be missing is that you can't cut a .1 inside corner radius using a tool that has a .125 side radius...Try either a smaller tool or a bigger raduis

HMB3000 this is a outside radius on a corner ( convex) . I tried it again with a smaller tool (.0625 ball end mill) .010 step over , from tool tip. Looks like the exact same tool path. Also with .062 ball end mill it sure goes off the edge alot ( I have .0000 roll over )


Also I have drawn the exact same part in Mastercam X and get the correct tool path . Notice the diffrence of how the tool follows the radius

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Any ideas thanks for the help all!!!

[HMB3000]

sorry about that it is hard to tell from a jpeg...can you post the file? It maybe the build your on...Have you updated lately?

[hall6ppc]

Originally Posted by HMB3000 sorry about that it is hard to tell from a jpeg...can you post the file? It maybe the build your on...Have you updated lately?

I am running 1137 build on V22. I ran a test part with program and it looks just like the tool path that was posted. I also ran some .500 convex radius and they to are not right . I tried to attach the bbcd file but couldn't figure out how to do that.

This is a 1.0 cylinder , just trying to see if I could get a .500 radius tool path. Not sure if you can see but I put measurement points to show where the centerline of tool should be ( I think), notice how far out the tool path is. . Tool is a .250ball end mill.

[mmc005]

If you want to post your file, try to zip it and then attach it to your post.
Are you saying that the center of the tool is further than .125 from the outer edge of the cylinder? Can you post the code for that cylinder?

Dave

[hall6ppc]

quote=mmc005;550015]If you want to post your file, try to zip it and then attach it to your post.
Are you saying that the center of the tool is further than .125 from the outer edge of the cylinder? Can you post the code for that cylinder?

Dave[/quote]

Yes it seems the tool center is .709 from center when Z is at -.5 . I drew the same part in Mastercam X and code look like when Z is at -5 , X will be at .615 . Which would seem to me to be correct.

I will post the mastercam code .

[hall6ppc]

Originally Posted by hall6ppc quote=mmc005;550015]If you want to post your file, try to zip it and then attach it to your post. Are you saying that the center of the tool is further than .125 from the outer edge of the cylinder? Can you post the code for that cylinder? Dave

Yes it seems the tool center is .709 from center when Z is at -.5 . I drew the same part in Mastercam X and code look like when Z is at -5 , X will be at .615 . Which would seem to me to be correct.

I will post the mastercam code .[/QUOTE]

This is the Mastercam X file of the same part . It looks correct to me. I sure would like to figure out what is wrong with the Bobcad . I can't use it it like this . Any Ideas ???

[moldmker]

For all of v22's misgivings, the 3D stuff does work pretty good for me.
I do inspect my parts with a toolmaker's scope for verification.

I recreated your 1.0" cylinder and it's correct on my system.(see pic)

I see your Z coords reach 0 , so your XYZ Allowance is probably 0.
There must be something going on with your tools.

Since .5 dia is the default tool size for the 3D ops, I'm betting that somehow your tool info is not being applied to the 3d op. (tool pic attached, for ref. only)

Does the error occur with other size tools?
Does the error occur with a manual tool vs. a system tool?
When you use the same tool on a simple 2D Profile operation, does it show the same offset error?

moldmker

[hall6ppc]

Originally Posted by moldmker For all of v22's misgivings, the 3D stuff does work pretty good for me. I do inspect my parts with a toolmaker's scope for verification. I recreated your 1.0" cylinder and it's correct on my system.(see pic) I see your Z coords reach 0 , so your XYZ Allowance is probably 0. There must be something going on with your tools. Since .5 dia is the default tool size for the 3D ops, I'm betting that somehow your tool info is not being applied to the 3d op. (tool pic attached, for ref. only) Does the error occur with other size tools? Does the error occur with a manual tool vs. a system tool? When you use the same tool on a simple 2D Profile operation, does it show the same offset error? moldmker Attachment 73349 Attachment 73350

moldmker- I tried just entering in tool dia in "system tool" instead of using manual tool and then selecting my tool from library library. I got the correct tool path then !!!! Wonder what the problem could be with my tools in the library ?

I also tried the part in the DEMO v23 and it does the exactly same thing. Guess I will call tech support this week to see whats up.

Thanks fo all the help

[tjones]

I believe the manual tool selection issue has been reported in V23. I also had the problem when using manual tools in 3D operations. It appears as though the software forgets to change tools.

In V23 do a tool verify before posting and see if it is incorrect. I found this when doing multiple Z level roughing where each had a manual tool selection with different tools.