More about lathe diameter mode on the Fanuc 0-TC (I found the
manual):
In diameter mode:
X specifies a diameter
U specifies an incremental diameter (not relevant in EMC)
coordinate system setting is done in diameter (like our
G10L2 and G92?)
X tool offsets can be in radius or diameter depending on setup
(I think they don't have anything like G10L1)
for arc R format, R is a radius
for arc IK format, I,K are radius values and always incremental
from the start point
feed rates are delta radius/revolution or delta radius/minute even
if the feed is along X
in canned cycles, X/U are diameter but some other things, like the
amount of taper on a tapered thread, are radius
Note that I don't know if this control did everything the
normal/common way or the way that's still common today. I thought it
might help you anyway to know what it says.
So I can think of a few unanswered questions:
John K is adding absolute arc center mode - what is the I in that
case if using diameter programming?
Are X repeats in canned cycles radius or diameter? Like
G17 G91 G85 R0 Z-1 X.005 L10 (I bore like this all the time)
Are I,J,K in G76 (offsets from the drive line and depth) radius or
diameter?
Is K in G33 (distance per rev) still radius if motion is along X?
(Pretty sure it should be)
Are diameters or radii written to the var file for offsets?
What about the tool change location that is read from the
ini file?
how much tweaking is required for the AXIS preview, display of
machine extents, length and time estimates on the properties
screen, etc?
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