feed screw

[mirek1017]

Hello everyone!!!!!

 

I have a question,Can I do  feed screw part  without multiaxis options on mastercam???? this is part .

 

Thanks   for any ideas

[Guest]

Moving to the correct forum,

[CJep]

Nope, that's simultaneous 4 axis work if you want to cut it using constant positioning in the indexer.

Also if you analyze the the helical surface the radius is constantly changing, to keep the tool in contact with the surface the tpath is going to need to move in pos/neg Y, you would need to use one of the multiaxis tpaths locked to 4 axis to do that. 

 

To use axis substitution the flat geom needs to wrapped around a constant dia from one end to the other.

[The Cathedral]

It is a constant diameter, however that doesn't matter, because it does not have to be one to use axis substitution.

[The Cathedral]

[mirek1017]

who kind toolpath  from multiaxis  should I use????

[CJep]

I would go after it with a flow, you will need to create a pattern surface, then you can use the helical surface as the comp.

[mirek1017]

this is multiaxis toolpath????

[CJep]

Sumthin' like this,..

[mirek1017]

Thank you very much 

[mirek1017]

CJep ,

 

and what if my geom It is the same between the two ends like for example screw compresor ,I could   use axis substitution?????

[CJep]

Here's a sample of axis substitution the first tpath has the geom wrapped around a dia and the second is using flat geom that the tpath is wrapping around a dia.

When using axis sub you are locking the substituted axis at zero and that movement is translated to rotary output.

In the part file you posted the center of the tool has to be able to move in the Y axis to cut that surface so you will see all four axis moving at the same time.

[mirek1017]

I know haw make center line and rough this part   , but  can  i do axis sub and   finish ??????

[CJep]

If you're referring to the blue faces in the screen shot, a multiaxis toolpath is going return better results than fighting with conventional tpaths.

[mirek1017]

oshould I use the same toolpath what you you used last time ?????

[CJep]

Here is a sample flow multiaxis toolpath on the geom,...

In the part file I swept a surface along the edge curves that define the root of the compressor blade, that is the pattern surf for the flow tpath.

Then the faces of the compressor blade are selected as the comp surfs for the tool tip control.

 

The reason you shouldn't use a axis sub tpath on this geom is because the tpath has to unwrap the geom then wrap it to do the axis sub, it's just the way the math works. The unwrapping process is what causes the geom to be unusable.

[mirek1017]

I do not have experience in 5 axis machining ,you know maybe at some files for help mi   more to understand   this????

 

 

thank you one more time

[DanielGingras]

I do not have experience in 5 axis machining ,you know maybe at some files for help mi   more to understand   this????

 

Hey master80,

 

There's a variety of resources available to help you learn multiaxis toolpaths. For books, we offer a few:

 

http://www.emastercam.com/board/store/product/711-mastercam-x8-intro-to-multiaxis-training-tutorial/

 

http://www.emastercam.com/board/store/product/712-mastercam-x8-advanced-multiaxis-training-tutorial/

 

http://www.emastercam.com/board/store/product/748-mastercam-x8-handbook-volume-3/

 

Each of the books at the above links has a free sample PDF you can download to see how the material is approached and what topics are covered in the books before buying anything. The handbook is more of a theory book and focuses more on the "what" and "why" as opposed to the "how" of the training tutorials.

 

You could also check with your local Mastercam reseller to see if they have any multiaxis training in your area coming up. 

[mirek1017]

THANKS