resharpened ballnose and surfacing

[Gouger]

Is it possible in MasterCAM to use cutter comp for a surface being cut with a ballnose endmill? I am curious what you have to do if you have a resharpened ballnose. Do you have to repost the program with the new radius of the resharpened endmill?

[Jack Mitchell]

Do you have to repost the program with the new radius of the resharpened endmill?

 

Yes, otherwise you are looking at a nightmare.

Never ever use comp when surfacing otherwise you need to be amazing at math.

 

Regards, Jack

[Harryman]

Ability to comp from posted code for a different ball nose cutter size is more of a control issue. Can your control do it? If so the correct codes could certainly be added to your post. I don't know if any controls can do this. My guess is that they cannot since the control is just reading positions and can't know which direction it should comp to without having the complete overview of the surface being cut, like the CAM system does.

 

I think you need to repost.

[Harryman]

Howdy Jack. Happy Saturday!

[Teh Bear without Brains kinda idiot]

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you have to do if you have a resharpened ballnose.

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Use it as rougher

[Thad]

I realize that this doesn't answer your question (the other guys already have ), but when you send your ballnose out for resharp, have them just sharpen the ball and leave the diameter alone. You'll lose a little flute length each time, but you can still finish with them.

 

I hope your name isn't indicative of your programming skills. Welcome to the forum, buddy.

 

Thad

[HevyMetl]

+1 pooh

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With the tolerances I am being required to hold now I would not even think of useing a resharpened cutter in a finishing operation. Not to mention when machining steel in the prehard and hardend state you have lost your coating. If you talk about recoating and endmills your cost have blossomed right back into the cost of a new one.

[Teh Bear without Brains kinda idiot]

In my place to resharp mill up to 6-8 mm is not practical .

You can buy a new one for a price .

And bigger ball nose mills I use with inserts .

So I do not resharp them at all .

How to use and old weared tools :

to mill off broken drill ,for a roughing or give them to conventional machinists .

The broken tools I use for cutters making (I grind them mostly to a pyramide looking cutters (

4 or 6 sides )

Resharpened tool without coating worth nothing ,and coating must be very accurate and sharp and I do not believe that many shops can do it so good as Iscar or YG )

Ball mills with coating with good cutting conditions and creative approach to machining

tend to serve for so long that they justify a price many times .

For steel and coating ball mill I do not use water coolant ,only air ,and never take off more

then z step 0.1 diameter but I give reasonable big speed and feed .

If you drop feed down from recomendations in most cases you`ll gain nothing but a mill life will be too small .

My principle is feed is feed ,a mill must cut ,

better to less z take off if you are not sure but not the feed !

Teh cut dem all !

[Scott Sizemore]

We have our ball emills reground (just the tip) and recoated.We use them time and time again. It is very hard to justify the cost of a new ball emill to do every job we do.

[cadist]

We often resharpen all our solid tools. For ball nose larger than 10 we prefer indexable. Usually there are many independent workshop who do this job only. Resharpen only at tip as far as possible.

[Teh Bear without Brains kinda idiot]

My main ball mills are 3 and 6 mm ,after that

I use inserts

As I said before here it is not reasonable to sharpen ball nose mills less then 8 mm .

So I use them till they last or till they good enough .

And I do not use resharpened ball mills at all and prefer to never use them .

To risky for my sort of work .

[Henk]

Winnie,

 

Witch insert-ballmills are you using?

No problems when changing inserts?

 

I'm looking for insert-ball and insert-bull mills

Hitachi and Dijet are from 8mm

LMT-Kieniger have them from 6mm

[Teh Bear without Brains kinda idiot]

I use Seco MInimaster from 6 mm to 12 mm and Iscar ball mills for 16 and higher .

Minimaster has very enchanced closing device

Both are good and accurate

Iscar has minimaster clone multimaster

Bull nose mills that I use are Seco and Dijet

I like to surface with my bull nose mills ,they are very fast and accurate .

Dijet I use only on hardened steels ,it rocks ,Seco on both hardened and prehardened .

Many folks here use only Seco ,or only Iscar,both are good .

But I like Seco more .

 

I can give you details later ,if you wish .

HTH

[Henk]

thanks,

 

We have some DEPO bull nose mills, and i'm also looking for Dijet on hardened steel