Lathe 3d tool

[Resunonac]

Hi

I am having some problems with a 3d tool for internal grooving.  It is made from stp files supplied by the manufactor.

When I create a lathe groove finish toolpath with the new 3D tool, the tool cuts differently than using a regular 2d created tool.

The first image shows the 2d tool, on the second pass lead in. It begins cutting only with the right corner.

The second image is the 3d tool. On the second pass it moves to a full width contact, before moving to the chain geometry selected for the operation.

The geometry used for the two finish groove operations are only the groove and the chamfers. And the parameters are identical.

It must be a mistake i have made when creating the 3d tool, but i havent been able to figure it out yet.

Hope you can help.

 

[Jespertech]

I'd check the parameters in the grooving cycle page and make sure "extend groove to stock" is set to parallel to groove walls and not tangent. If that's not the problem you could always play around with the adjust start/end  of contour tabs.

[Jespertech]

I'm not sure if this will work the same for a 3D tool but if you go to edit tool and then select draw tool make sure that both edges display the available cutting edge definition  (the red circles on front and back edge of tool) .

It could be an issue where it only recognizes the front edge so it will drive the path off of that and just compensate for the width of the tool. 

[Resunonac]

Hi Jespertech

Everything works fine with a normal 2d tool.
the problem is only with the 3d tool. I tried to play with start/end of contour. But without any luck

[Jespertech]

2 minutes ago, Resunonac said:

Hi Jespertech

Everything works fine with a normal 2d tool.
the problem is only with the 3d tool. I tried to play with start/end of contour. But without any luck

any chance you can post the file? I would just need the 3D tool and groove profile to mess around and see if there's a way around it. 

[Resunonac]

I am on a  HLE version. Hope it works anyway

emastercam.TOOLDB

groove_1mm.emcam

[Resunonac]

Hi Jespertech

I think, maybe, i found the setting which created the problem.

In the 3d tool creator/ compensation tab, I switched the plunge/cut direction and then i worked perfect - like the other 2d tool.

Maybe I am misunderstanding plunge/cut directions, but now I know where to look, if the problem comes back again.

Thanks for trying to help me out here

[Jespertech]

6 minutes ago, Resunonac said:

Hi Jespertech

I think, maybe, i found the setting which created the problem.

In the 3d tool creator/ compensation tab, I switched the plunge/cut direction and then i worked perfect - like the other 2d tool.

Maybe I am misunderstanding plunge/cut directions, but now I know where to look, if the problem comes back again.

Thanks for trying to help me out here

I was in the middle of typing this exact issue out when I noticed you had already solved it lol

for some reason it had the plunge direction and the cutting direction flip flopped, definitely good  to know going forward to check that out for any 3d tools.  

looks like we both learned something new today 

[crazy^millman]

Another trick when working with solid carbide tools like that is to make the end of the tool one solid body and the shank another. Help when doing 3D Lathe tools to have them divided.