How can I improve finish

[wojtek90]

Hi, 

I am working on the project below. I did programming ,but i am not happy with the  finish on round edges.

How can  I get better finish then this without putting much more time in operations. I am using "Surface flow line" with 3/8 ball nose cutter.

Any help appreciated.

 

3-400-004-006.mcam

[Leon82]

I can't see the file, but if surfacing if you can use a bull endmill and get a better finish if you can fit it in your feature.

 

The center of the ball endmill isn't really spinning so you would want to tilt it if possible so get some surface footage going

[#Rekd™]

You have 2 different toolpath groups, which one are you referring to? The toolpath group 2 has your part flipped over and rotated 90 degrees.

 

[The Chipmaker]

   I see a feed rate of 120 and .008 fpt. I would cut that back and bump up your rpm's. Just my 2 cents.

[wojtek90]

Thank you. I am talking about first operation (round corners).

[htm01]

i would go 90 deg to your current cutting direction or lower your stepover distance

[wojtek90]

How can i change for 90 degree ? I do not see this option.

[mirek1017]

5 minutes ago, wojtek90 said:

How can i change for 90 degree ? I do not see this option.

pres flowline   ,and   cut direction 

[wojtek90]

5 minutes ago, mirek1017 said:

pres flowline   ,and   cut direction 

Thank you.

 

[jslaero99]

What material? When kellering soft steels (1018, 1045) it's hard to get a decent finish... As for your scallop height, you're less than .0002 so that is fine. It must be just a small adjustment on RPM vs. feed and check your runout. That's pretty much it! HTH!

                        Have a good w-e!

[?Mark]

Simple part, so flowline will do the trick, but for MUCH more control try blend on this and or more complicated parts

 

[nickbe10]

On 9/12/2019 at 5:28 PM, wojtek90 said:

Any help appreciated.

On the whole unless someone is accurately calculating both the radial and axial chip thinning they are probably running too light a chip load to get a good finish. This results in chatter or rubbing the material with the tool (rather than cutting) and gives poor finish and reduced tool life.

Try either reducing spindle speed or increasing feed rate.