| G CODE | A
word
addressed
by
the
letter
G
and
followed
by
a
numerical
code
defining
preparatory
functions
or
cycle
types
in
a
numerical
control
system
|
| G CODE | Code that represents a preparatory instruction. A number that allows the G
address.
|
| G FUNCTION | Command that determines a machine and/or CNC function mode, such as
interpolation type , canned cycle, threading, and coordinate system selection.
|
| G-CODE | G-code is a term applied to the coding language used to program and instruct a CNC machine.
|
| GAGE | Any one of a large variety of devices for
measuring or checking the dimensions of objects.
|
| GAGE BLOCKS | Steel blocks machined to extremely accurate dimensions
|
| GAGE, DEPTH | A tool used in measuring the depth of
holes or recesses.
|
| GAGE, DRILL | A flat steel plate drilled with holes of
various sizes, each marked with the correct size or
number. into which small twist drills may be fitted to
determine the size of their diameters.
|
| GAGE, DRILL POINT | A gage use to check the 59” angle
on drills.
|
| GAGE, FEELER (THICKNESS GAGE) | A gage consisting of a
group of very thin blades, each of which is accurately
ground to a specific thickness.
|
| GAGE, INDICATING (DIAL INDICATOR) | A gage consisting
of a dial, commonly graduated (marked) in
thousandths of an inch, to which is fastened an
adjustable arm
|
| GAGE, RADIUS (FILLET GAGE) | Any one of a number of
small flat, standard-shaped metal leafs or blades used for checking the accuracy of regular concave and
convex surfaces
|
| GAGE, SCREW PITCH | A gage consisting of a group of
thin blades, used for checking the number of screw
threads per unit of distance, usually per inch, on a
screw, bolt, nut, pipe, or fitting.
|
| GAGE, TELESCOPING | A T-shaped gage used to measure
the diameter or width of holes.
|
| GAIN | The
ratio
of
the
magnitude
of
the
output
of
a
system
with
respect
to
that
of
the
input
(
the
conditions
of
operation
and
measurements
must
be
specified,
e.g
voltage,
current
or
power)
.
|
| GANG MILLING | A milling setup where a number of
cutters are arranged on an arbor so that several
surfaces can be machined at one time. It is commonly
used for production purposes.
|
| GATE | A
device
which
blocks
or
passes
a
signal
depending
on
the
presence
or
absence
of
specified
input
signals.
|
| GAUGE HEIGHT | A
predetermined
partial
retraction
point
along
the
Z
axis
to
which
the
cutter
retreats
from
time
to
time
to
allow
safe
X-Y
table
travel
|
| GEAR BLANK | A stamping, casting, or any piece of
material from which a gear is to be machined. It is
usually a disk.
|
| GEAR TOOTH | A special caliper used to
measure both the “choral thickness” and the depth of
a gear tooth.
|
| GENERAL
PURPOSE
PROCESSOR | A
computer
programme
which
carries
out
computations
on
the
part
programme
and
prepares
the
author
location
data
for
a
particular
part
without
reference
to
machines
on
which
it
might
be
made
|
| GENERAL PURPOSE
COMPUTER | A
computer
designed
and
capable
of
carrying
out
a
wide
range
of
tasks
|
| GEOMETRIC OFFSET VALUE | That part of a tool offset value which compensates for the geometry of the
tool.
|
| GIB | A tapered strip of metal placed between the
bearing surface of two machine parts to ensure a
precision fit and provide an adjustment for wear.
|
| GRAPHIC FUNCTION | Drawing the trajectory of a tool, being driven by the current machining program,
on the CNC screen.
|
| GRAPHICS | The
use
of
a
computer
to
interactively
create
a
drawing
displayed
on
a
terminal
|
| GRAY
CODE | A
binary
code,
in
which
successive
values
differ
in
one
place
only
|
| GROUP
TECHNOLOGY | The
grouping
of
machines
and
of
parts
based
on
similarities
in
production
requirements
such
that
the
parts
may
be
produced
more
efficiently
|
| GROUP NUMBER | Common number assigned to G codes having similar functions. For example,
group number 00 is assigned to one-shot G codes such as G04, G05 and
G45.
|