5 axis curve

[chall]

Hi everyone,

 

I have a problem using the 5 axis curve. I don’t really do much full 5 axis work as we don’t often need to use it. In this instant I’m milling round a section of a sphere, now I’m getting the results I want by the looks of it but as it gets half way down the geometry it goes back up the geometry slightly and then carries on back down. Where as I want one continues flow. Where am I going wrong??

 

I have loaded a file on the ftp in mx5 called MC-5X CURVE.MX5 the tool will gouge at the end slightly as it not the correct tool as it probably will be a custom tool, I’m just trying to get the motion correct first.

 

Any help or advice would be much appreciated.

 

Regards

[MLS]

I can't get to the file due to IT restrictions so not sure, but I have seen what you are describing where two surfaces meet and are possibly not exactly tangent therefore it has to stay normal to the end of the first surface, then back up to stay normal to the start of the second.

 

Could this be the case?

[JDowe]

Sometimes when the tool goes past the vertical it will double cut that area

Try this

Since the geometry is an arc set the tool axis control to a point and choose the center of the arc

[chall]

its one surface on the solid, i thought that might be causing me an issue so i created a new swept surface but got the same results.

[chall]

jdowe,

i'll try that when im back at work tomorrow. thanks for the tips

[Tyler Robertson]

It's because of the way the toolpath projects onto the surface

 

Because you have it set to 'normal to surface', the toolpath calculation projects your wireframe against your surface.

 

Under Cut Pattern, there's a parameter at the bottom called "Projection" - Right now its set "Normal to Plane", and you have space between your wireframe and your surface. So if the wireframe projects normal to the plane you're on (top), the path itself might project in a way that overlaps itself. Think of it as string, and if you take the string and drop it on the surface.. how might the string fall on it.

 

Set that to "Normal to surface" and give it a distance of 1mm. It's basically a search distance for the calculation. Put it too small and the toolpath won't calculate, too big and it will calculate far longer

[chall]

Tyler, that worked a treat! Thanks for your help

 

Regards

[Tyler Robertson]

awesome glad to hear it