rad problem

[Marty A]

moring evryone i got a little problem.

i,m probraming a pocket with .252 rads in the

corners.no biggie i thought.i program it with

a 1/2 end mill.ok no problem it looks good in verify.ok they go to run the program and it didn,t post out rads just straight lines.so i post it out with a 3/8 end mill and every thing is fine.i don't know why the 1/2 em did'nt work.

i can't figure it out.any ideas?maybe a setting some where i don't see?. thanks in advance for any thoughts on this.have a good day all

 

 

marty

[Quickmike]

I see you are in early this morning. Is this a surface or 2d pocket program?

[Marty A]

just a rgeular 2d pocket. thanks

[Kannon]

isnt it going to be practically a straight cut using a 1/2 endmill..its going to leave you a .250 rad. on a straight cut regardless in the corners. I think maybe I am misunderstanding the question here. Are you leaving any stock for cleanup or finish pass?

 

GIVE THAT CUTTER SOME BREATHIN ROOM..

[Marty A]

nope leaving no stock,it should have followed the arc seeing it is a .252 rad.but ithink you are right when you say it needs some breathing room. thanks kannon and no you did'nt misunderstand i tkink you hit it right on.

oh and yes quickmike i start at 5 am yea it's early

 

marty dazed and confused

[Guest]

I am think it is something in your settings

 

I just did a 3 X 3 square with .252 internal corner rads and I got this.

 

code:

---

G00 G90 G54 X.3889 Y.975 S10000 M03

G43 H16 Z2. M08

G08 P1 (LOOK-AHEAD ON)

Z.1

G01 Z-.25 F20.

G41 D16 X.1945 Y1.1695 F65.

G03 X0. Y1.25 I-.1945 J-.1945

G01 X-1.248

G03 X-1.25 Y1.248 I0. J-.002

G01 Y-1.248

G03 X-1.248 Y-1.25 I.002 J0.

G01 X1.248

G03 X1.25 Y-1.248 I0. J.002

G01 Y1.248

G03 X1.248 Y1.25 I-.002 J0.

G01 X0.

G03 X-.1945 Y1.1695 I0. J-.275

G01 G40 X-.3889 Y.975

G00 Z2. M09

---

Notice the .002 rad swings

 

I am not sure where it might be but you might want want to try one of the "standard" posts, MPFAN perhaps and see if that works

[Kannon]

MPMASTER gives me the arc swings..

code:

---

(T )

(DATE - 14-07-07 TIME - 08:18 )

( 1/2 FLAT ENDMILL TOOL - 1 DIA. OFF. - 1 LEN. - 1 DIA. - .5 )

N100 G20

N102 G0 G40 G49 G80 G90

N104 T1 M6

N106 G0 G90 G56 X1.248 Y1.25 S3056 M3

N108 G43 H1 Z.1

N110 G1 Z-.05 F6.4

N112 X-1.248 F24.4

N114 G3 X-1.25 Y1.248 I0. J-.002

N116 G1 Y-1.248

N118 G3 X-1.248 Y-1.25 I.002 J0.

N120 G1 X1.248

N122 G3 X1.25 Y-1.248 I0. J.002

N124 G1 Y1.248

N126 G3 X1.248 Y1.25 I-.002 J0.

N128 G1 Z.1 F6.4

N130 M5

N132 G90 G00 G53 Z0.

N134 M30

---

[Marty A]

thanks again guys i knew it was something

will try the post and see what goes on.

going home now you have a good weekend

 

 

marty

[Bryan Johnson]

check your filter and cutter comp settings.

with 0 stock, filter off, and comp "optimize" off, your should get arc moves using any post.