[kreativjustin]

So I'm programming a lathe here, and my radius didn't come out as expected. This is going to be done with a boring bar, with internal radius. (Hardinge Elite 8/51 Turret lathe)

This is what I have, I'm trying to get a .039 radius"

G99 G01 Z0.0 X.627 F.001
G02 X.587 Z-.04 R.04
G01 Z-.339

The code put a radius in there, but no where to the desired effect. i'm not sure what I am doing wrong though. Any and all help is appreciated.

[Superman]

For a full quadrant rad... or 45° chamfer
X change is double the Z change

your endpoint in X needs to be 0.080 smaller.... X0.547

[rcs60]

Superman is correct

i would say as your z starts at 0. that the starting point should be .667 dia. and the ending point is your .587 dia.

[Superman]

Superman is correct

i would say as your z starts at 0. that the starting point should be .667 dia. and the ending point is your .587 dia.

1 of us is correct...

[rcs60]

Hey superman you are right again one of us is right

original poster kreativjustin wrote The code put a radius in there, but no where to the desired effect. i'm not sure what I am doing wrong though. Any and all help is appreciated.

here it sounded to me as though the cam software is not set for turning (diametrical )but may be set for milling (just a guess )
with out the knowledge of what the cam software is and how it is being used we won't know

[Superman]

here it sounded to me as though the cam software is not set for turning (diametrical )but may be set for milling (just a guess )
with out the knowledge of what the cam software is and how it is being used we won't know

It seems as if it is a manual progamming error.... easily done, but hard to see the offending code.
It also shows the problem with using R, instead of I & K
addresses. His 0.040 radius was there, but was not a full quadrant rad.

[kreativjustin]

Sorry for the late reply. I am not using Cam Software for the lathe, manual programming. I don't do anything overly sophisticated, yet.

So a .04' would require double the .04' and make it a .08' diam to get full quadrant. Seems a little aggressive on the tool to take all at once though, better make it a canned boring cycle then! Thanks ladies and gents.