Puma 240B

[GHPoe]

Well we just got our Puma 240B/FANUC CNTRL in a couple days ago and so far I am pretty happy with its overall function.

I am trying to tap (3/8-16) a hole down the center of my first part. I have the spindle at 400RPM and Feed at .0625 IPR.

My code was as follows

...
M3 S400
G01 X0. Z1.0
G99 G84 R.4 Z-1.0 F.0625
G80
...

and what the result was is that the turret moved to X0. Z1.0 then WENT BACKWARDS by ~.4"(im guessing) AWAY FROM THE PART. THEN TAPPED THE HOLE AND CAME OUT.

I was anticipating the R plane to be .4 away from the part. From further testing it seems that the R is an incremental value and that is why it moved away instead of to .4 away from the Z0. work offset. So i could correct the code to R-.6 to achieve the desired result.

Can someone confirm or point me to where in the docs this is an incremental value? I am coming from Hass mills and G codes are quite different.

Thanks,
GH

[dcoupar]

From the Fanuc 16/18/21i-T manual:

G84 X(U)_ C(H)_ Z(W)_ R_ P_ F_ K_ M_ ;
or
G88 Z(W)_ C(H)_ X(U)_ R_ P_ F_ K_ M_ ;
X_ C_ or Z_ C_ : Hole position data
Z_ or X_ : The distance from point R to the bottom of
R_ : The distance from the initial level to point R level
P_ : Dwell time at the bottom of a hole
F_ : Cutting feedrate
K_ : Number of repeats (When it is needed.)
M_ : M code for C–axis clamp (when it is needed.)

[GHPoe]

Thank you!

This is making some sense now.

~GH