[derek68]

I am trying to use a g71 to rough an internal profile with an undercut. The problem is it wants to do the undercut with 1 cut. I am wondering how I can do this with a g71 type 2? I have never tried it and I am wondering how to get it working.

thanks in advance

[derek68]

sorry it is a fanuc 16t control

[dcoupar]

Post your program here.

[sinha_nsit]

Specify both X and Z in the P-block, for type II operation.

[derek68]

I will post the program when I get back to the shop. what do you mean post the x and z on the p line?

[dcoupar]

I will post the program when I get back to the shop. what do you mean post the x and z on the p line?

G71 P101 Q102 ...
N101 G00 Xnnn.nnnn Znnn.nnnn (P-BLOCK) <--- programming X AND Z in this block specifies Type II roughing cycle.
...
...
...
N102 (Q-BLOCK)

[derek68]

I will try it out on monday and let you know. thanks for the help

[derek68]

here is the program I am still unsure about the p line

g00g28u0w0
n10g54t1111
g96s300m04
g00x2.00z.100
m08
g71u.100r.050
g71p20q30u-.025w.025f.010
n20g00x3.780
g01x0.0f.010
g01x3.52z-.130
z-.658
g03x3.395z-.720r.062
g01x3.1
z-.970
x3.500z-2.00
z-3.5
x2.2z-5.75
z-7
n30
g70p20q30

[derek68]

I figured it out. I had to change a parameter in the controler and everything seems to be working fine.

[sinha_nsit]

I doubt.

[derek68]

I put the x and z on the p line and i was getting an error no matter what I did. I then was told that I had to change a parameter to be able to use a type 2 roughing cycle on a controler from the mid 90s. I changed the parameter and put the x and z on the same line and now it works

[sinha_nsit]

...
g01x0.0f.010
...

Have you typed this line correctly?

[derek68]

z0

[positiverake]

What parameter did you change, im having the same problem