Ball end mill problem

[Peccator]

I am drilling (G72) with a 12mm ball end mill to create a .275 diameter surface dimple which comes out to .0441 deep. Retract set to .05 / Top of stock is 0.000.

 

Problem:

Backplotting-The tool is acting like it is set from center of the ball radius. Which looks like it rapids into the part. Then it travels to Z-0.0441 deep. The tool in backplot never leaves the part. It just rapids thru it.

 

Verify-Here it does the same thing. It travels thru the part. But, here it does cause a collision but it posts out O.K.

 

code:

---

N12 T7 M6

N13 ( 12 MM CARBIDE BALL END MILL )

N14 ( CREATE SURFACE DIMPLES )

N15 G0 G90 S2500 M3 E1 X6.9882 Y-.5906

N16 H7 Z.05 M8

N17 G82 G99 Z-.0442 R0.05 P250. F5.

N18 X4.2323

N19 X1.4764

N20 G80

N21 M5 M9

N22 G49 Z0.

N23 E0 X0 Y0

N24 M2

---

My beef/question: Why doen't the ball end mill stop at the tip of the radius .05 from the part like a regular drill would do? Is it me?

 

Rookie 1 teh stumped.

[Jeremy Grigsby Excelsior Marking]

In your job setup check and make sure there isn't a .1 value set in the Z origin. If you don't set your stock size in your job setup, it tends to put a value in for stock by default. I'm not sure if this is where your problem lies, but it happens to me occasionaly doing verify, because I forget about that value

[Peccator]

Jeremy,

I have the Z origin set at .02 in job setup.

[Peccator]

Oh yeah, the face mill runs B4 this tool. So, Z origin is 0.000000000000.

[Jeremy Grigsby Excelsior Marking]

Yeah never mind, I just tried it out and its like whatever z value you put in for the drill depth it shows the same verification, with the whole diameter of the tool cut into the part. I guess there must be something else. Now you have me wondering...

[Peccator]

So, it's not me. Good.

 

[ 12-23-2003, 11:09 PM: Message edited by: Rookie 1 ]

[Nominal]

I tried it. In your drilling parameters if you select tip comp and make the breakthru 0 and the tip angle 0 it looks like what you want it to look like in verify.

[Thad]

This has been covered before. Read more about it here.

 

Thad

 

[ 12-25-2003, 01:19 AM: Message edited by: Thad ]

[Peccator]

Thanks Nominal. I will try this Monday 12-29.

[Peccator]

quote:

---

I tried it. In your drilling parameters if you select tip comp and make the breakthru 0 and the tip angle 0 it looks like what you want it to look like in verify.

---

Thank you, Nom.

 

quote:

---

This has been covered before. Read more about it

---

Thank you, Thad.

 

Once again you guys prove that this forum RAWKS and that everyone here has a spirit of friendship and cooperation.

 

Rookie 1 teh humbled.

[Thad]

Glad to help.

 

Thad