| A AXIS | The
axis
of
rotary
motion
of
a
machine
tool
member
or
slide
about
the
X
axis |
| A-SPLINE | The Akima spline progresses tangentially through the programmed nodes (3rd degree polynomial). An Akima interpolation is a continuously differentiable sub-spline interpolation. |
| ABRASIVE - NATURAL | (sandstone, emery, corundum, diamonds) or artificial (silicon carbide, aluminum oxide) material used for making grinding wheels, sandpaper, abrasive cloth, and lapping compounds. |
| ABRASIVE WHEELS | Wheels of a hard abrasive, such as
Carborundum used for grinding |
| ABSOLUTE ACCURACY | Accuracy
as
measured
frcm
a
reference
which
must
be
specified. |
| ABSOLUTE DIMENSION | A
dimension
expressed
with
respect
to
the
initial
zero
point
of
a
co-ordinate
axis |
| ABSOLUTE LINEAR SCALE | Detector for an absolute position on a straight line. |
| ABSOLUTE POINT (ROBOTS) | Equivalent
to
absolute
co-ordinates
in
NC
machines.
The
co-ordinates
of
a
data
point
are
defined
in
relation
to
an
absolute
zero |
| ABSOLUTE POSITION DETECTOR | Detector that indicates the absolute coordinates of a machine element, relative
to a selected origin. |
| ABSOLUTE PROGRAMMING | Method of programming the coordinates of a tool movement end point. |
| ABSOLUTE PULSE CODER | Rotary absolute position detector. |
| ABSOLUTE READOUT | A
display
of
the
true
slide
position
as
derived
from
the
position
commands
within
the
control
system. |
| ABSOLUTE SYSTEM | NC
system
in
which
all
positional
dimensions,
both
input
and
feedback,
are
measured
from
a
fixed
point
of
origin. |
| ABSOLUTE VALUE | Distance or angle from the origin of a coordinate system. |
| ACCANDEC | Acceleration
and
deceleration)
Acceleration
and
deceleration
in feedrate;
it
provides
smooth
starts
and
stops
when
operating
under
NC
and
when
changing
from
one
feedrate
value
to
another |
| ACCELERATION WITH JERK LIMITATION | To obtain the optimum acceleration gradient for the machine while at the same time minimizing mechanical wear and tear, the machining program offers a choice between instantaneous acceleration and continuous (smooth) acceleration. |
| ACCEPTANCE TEST | A
series
of
tests
which
evaluate
the
performance
and
capabilities
of
both
software
and
hardware |
| ACCESS RIGHTS | Programs and other files are protected by a level system of access restrictions |
| ACCESS TIME | The
time
interval
between
the
instant
at
which
information
is:
1.
called
for
frcm
storage
and
the
instant
at
which
delivery
is
completed,
i.e.,
the
read
time.
2.
Ready
for
storage
and
the
instant
at
which
storage
is
completed,
i.e.,
the
write
time. |
| ACCUMULATOR | A
part
of
the
logical-arithmetic
unit
of
a
computer.
It
may
be
used
for
intermediate
storage
to
form
algebraic
suns,
or
for
other
intermediate
operations |
| ACCURACY | 1.
Measured
by
the
difference
between
the
actual
position
of
the
2.
Conformity
of
an
indicated
value
The
accuracy
machine
slide
and
the
position
demanded
of
a
true
value,
i.e.,
an
actual
or
an
accepted
standard
value
of
a
control
system
is
expressed
as
the
deviation
or
difference
between
the
ultimately
controlled
variable
and
its
ideal
value,
usually
in
the
steady
state
or
at
sampled
instants |
| ACCURATE | Conforms to a standard or tolerance. |
| ACME THREAD | A screw thread having a 29 degree included angle. Used largely for feed and adjusting screws on machine tools. |
| ACTIVE STORAGE | That
part
of
the
control
logic
which
holds
the
information
while
it
is
being
transformed
into
motion |
| ACTUAL CUTTING FEEDRATE DISPLAY | Display of a tool feedrate per minute. |
| ACUTE ANGLE | An angle that is less than 90 degrees. |
| ADAPTER | A tool holding device for fitting together
various types or sizes of cutting tools to make them
interchangeable on different machines |
| ADAPTIVE CONTROL | A
technique
of
automatically
adjusting
feeds
and/or
speeds
to
an
optimum
by
sensing
cutting
conditions
and
acting
upon
them |
| ADDENDUM | That portion of a gear tooth that extends
from the pitch circle to the outside diameter. |
| ADDRESS | Alphabetic character that defines the use to which the number that follows it is
applied (ie x axis command). |
| ADDRESS | A
character
or
group
of
characters
at
the
beginning
of
a
word
what
identifies
the
data
of
allowing
in
the
word |
| ADDRESS BLOCK FORMAT | A
block
format
in
which
each
word
contains
an
address |
| ALARM | Error detected by the CNC, such as a program error, operator error, or hardware
failure. |
| ALARM HISTORY DISPLAY | Storing alarms detected by the CNC and displaying them on the screen. |
| ALGOL | (Algorithmic
Language)
Language
used
to
develop
computer
programmes
by
algorithm. |
| ALGORITHM | A
rule
or
procedure
for
solving
a
mathematical
problem
that
frequently
involves
repetition
of
an
operation |
| ALIGN | To adjust or set to a line or center. |
| ALLOWANCE | The prescribed difference in dimensions
of mating parts to provide a certain class of fit. |
| ALLOY | A metal formed by a mixture of two or more
different metals |
| ALPHANUMERIC DISPLAY | Equipment,
such
as
a
CRT,
which
is
capable
of
displaying
only
letters,
digits
and
special
characters |
| ALPHANUMERIC OR ALPHAMERIC | A
system
in
which
the
characters
used
are
letters
A
through
Z,
and
numerals
0
to
9 |
| AMPLIFIER | A
signal
gain
device
whose
output
is
a
function
of
its
input |
| AMPLITUDE | Term
used
to
describe
the
magnitude
of
a
simple
wave
or
simple
part
of
a
complex.
The
largest
or
crest
value
measured
from
zero |
| ANALOG | In
NC
the
term
applies
to
a
system
vhich
utilizes
electrical
voltage
magnitudes
or
ratios
to
represent
physical
axis
positions |
| ANALOG DATA | The
information
content
of
an
analog
signal
as
conveyed
by
the
value
of
magnitude
of
seme
characteristics
of
the
signal
such
as
the
amplitude,
phase,
or
frequency
of
a
voltage,
the
amplitude
or
duration
of
a
pulse,
the
angular
position
of
a
shaft,
or
the
pressure
of
a
fluid |
| ANALOG SIGNALS | Physical
variables
(e.g.,
distance,
rotation)
represented
by
electrical
signals |
| ANALOG-TO-DIGITAL (A/D) CONVERTER | A
device
that
changes
physical
motion
or
electrical
voltage
into
digital
factors |
| AND-GATE | A
signal
circuit
with
two
or
more
inputs.
(Signal
only
if
all
inputs
received
coincident
signals) |
| ANGLE IRON | An iron or steel structural member that has been cast, rolled, or bent (folded) so that its cross section is L-shaped. |
| ANGLE PLATE | A precision holding fixture made of cast iron steel, or granite. The two principal faces are at right angles and may be slotted for holding the work or clamping to a table. |
| ANGULAR AXIS CONTROL | Controlling the movement of each of two controlled axes mounted at an angle
other than a right angle. Programming is done in rectangular coordinates. |
| ANNEALING | The controlled heating and cooling of a
metal to remove stresses and to make it softer and
easier to work with |
| ANVIL | A heavy iron or steel block upon which metal
is forged or hammered, also the fixed jaw on a
micrometer against which parts are measured. |
| APPLICATION PROGRAMMES | Computer
programmes
designed
and
written
to
value
a
specific
problem |
| APPROACH FORBIDDEN AREA | That part of a safety zone which a tool is forbidden to enter. |
| APRON | That portion of a lathe carriage that contains
the clutches, gears, and levers for moving the
carriage. It also protects the mechanism. |
| APT | (Automatically
Programmed
Tools)
programme
system
for
multi-axis
contouring
programming.
APT
III
-
Provides
for
five
axes
of
machine
tool
motion |
| ARBOR | A shaft or spindle for holding cutting tools;
most usually on a milling machine. |
| ARBOR PRESS | A hand-operated machine tool designed
for applying high pressure for the purpose of pressing
together or removing parts. |
| ARC CLOCKWISE | An
arc
generated
by
the
co-ordinated
motion
of
two
axes
in
which
curvature
of
the
path
of
the
tool
with
respect
to
the
workpiece
is
clockwise,
when
viewing
the
plane
of
motion
fran
the
positive
direction
of
the
perpendicular
axis |
| ARC COUNTERCLOCKWISE | (Substitute
Counterclockwise
for
Clockwise
in
Arc
Clockwise
definition.) |
| ARCHITECTURE | Operating
characteristics
of
a
control
system,
or
control
unit,
or
computer |
| ARCHIVING | Exporting files and/or directories to an external storage device. |
| ARGUMENT SPECIFICATION | Assigning an actual value to a variable used in a custom macro program to be
called. |
| ASCII | (American
Standard
Code
for
Information
Interchange)
transmission
code
which
has
been
established
as
an
American
Standard
by
the
It
is
a
code
in
which
7
bits
are
used
to
A
data
American
Standards
Association.
Represent
each
character,
also
USASCII. |
| ASCII CODE | Information exchange code complying with the applicable ANSI standard.
Used in numerical control. |
| ASSEMBLY | The
fitting
together
of
a
number
of
parts
to
create
a
complete
unit |
| ASSEMBLY DRAWING | The
drawing
of
a
number
of
parts
which
shows
how
they
fit
together
to
construct
a
complete
unit |
| ASSIST GAS | Gas provided to the workpiece during laser processing. Oxygen, inert gas, or
other gas is used depending on the workpiece material and the processing method. |
| ASSIST GAS CONTROL | Series of control relating to assist gas output, including switching of the gas type
and control of the gas pressure. The optimum gas can be selected according to
the material of the workpiece and the method of processing |
| ASSIST GAS PRESSURE OVERRIDE | Manual control in which the operator can temporarily change the assist gas pressure during operation. This function is used to create the same figure with different materials or stock thicknesses |
| ASYNCHRONOUS | Without
any
regular
time
relationship |
| ASYNCHRONOUS SUBPROGRAM | Part program that can be triggered asynchronously to (irrespective of) the current program status by means of an interrupt signal (e.g. "highspeed NC input" signal). |
| ASYNCHRONOUS TRANSMISSION | The
transmission
of
information
in
irregular
sections,
with
the
time
interval
of
each
transmission
varying
and
each
section
being
identified
by
a
stop
and
stop
signal |
| ATTITUDE CONTROL A | Three–dimensional control applied to the attitude of a processing head for which
the nozzle tip position is fixed (zero offset type) |
| ATTITUDE CONTROL B | Three–dimensional control applied to the attitude of an offset–type processing
head |
| ATTRIBUTE | A
quality
that
is
characteristic
of
a
subject. |
| AUTOMATED ASSEMBLY | The
application
of
automation
to
assembly |
| AUTOMATIC ACCELERATION/ DECELERATION | Applying acceleration/deceleration automatically when the tool starts or stops
moving, in order to reduce mechanical stress imposed on the machine. |
| AUTOMATIC CORNER DECELERATION | Changing the cutting feedrate for machining a corner according to a difference
in the corner angle between machining blocks or a difference in the cutting
feedrate between axes. |
| AUTOMATIC CORNER OVERRIDE | Overriding the cutting feedrate for an inner corner and changing the cutting
feedrate for an inner arc. |
| AUTOMATIC GRINDING CENTER | A CNC machining center used to grind and sharpen tools, inserts, etc. |
| AUTOMATIC INSERTION OF SEQUENCE NUMBER | Automatically inserting a sequence number into each block in EDIT mode
during program creation based on manual data input. |
| AUTOMATIC OPERATION | Operation based on a program. |
| AUTOMATIC OVERRIDE FOR INNER CORNER | Automatically overriding a cutting feedrate at each end of an inner corner,
produced based on a tool path that has been subjected to cutter compensation. |
| AUTOMATIC REFERENCE POSITION RETURN | Automatically feeding a specified axis to a reference position using a program
command. |
| AUTOMATIC STOP | A device which may be attached to
any of several parts of a machine tool to stop the
operation of the machine at any predetermined point. |
| AUTOMATIC TOOL CHANGER | Also known as ATC, an automatic tool changer system automatically changes the tools in a CNC machining center to fit whatever task is needed to process a product, all without the need for human operator interaction. |
| AUTOMATIC TOOL LENGTH MEASUREMENT | Issuing an automatic measurement command to the CNC to move the tool to
the measurement position, thereby allowing the CNC to automatically calculate
the tool offset value. |
| AUTOMATIC TOOL OFFSET | Giving an automatic measurement command to the CNC and moving the tool
to a measurement position, thereby letting the CNC automatically measure
tool offset values. |
| AUTOMATION | The
technique
of
making
a
process
or
system
automatic.
Automatically
controlled
operation
of
an
apparatus,
process,
or
system,
especially
by
electronic
devices.
In
present
day
terminology,
usually
used
in
relation
to
a
system
whereby
the
electronic
device
controlling
an
apparatus
or
process
also
is
interfaced
to
and
ccmmuncates
with
a
computer |
| AUXILIARY FUNCTION | A
function
of
a
machine
other
than
the
control
of
the
co-ordinates
of
a
workpiece
or
cutter
-
usually
on-off
type
operations |
| AUXILIARY FUNCTION LOCK | Disabling a specified M, S, or T function. |
| AXIS | 1.
A
principle
direction
along
which
a
movement
of
the
tool
or
workpiece
occurs.
2.
One
of
the
reference
lines
of
a
co-ordinate
system |
| AXIS (ROBOTS) | A
moving
element
of
a
robot
or
manipulator |
| AXIS CONTROL FUNCTION | Generic name for control functions for controlled axes. |
| AXIS DESCRIPTIONS | The machine moves along its axes of motion. All movements along an axis are either in a positive or negative direction. Not all machines use the same system to identify axes. The descriptions used in this manual are commonly used to identify 3-axis mills. |
| AXIS IDENTIFIER | In compliance with DIN 66217, axes are identified as X, Y, Z for a right-handed rectangular Cartesian; coordinate system rotating in the clockwise direction. Rotary axes rotating around X, Y and Z are assigned the identifiers A, B and C. Additional axes, which are parallel to those specified, can be identified by other letters. |
| AXIS INHIBIT | Prevents
movement
of
the
selected
slides
with
the
power
on |
| AXIS INTERCHANGE | Switching the correspondence between a specified axis movement command
and the machine axis that actually moves. |
| AXIS INTERCHANGE | The
capability
of
inputting
the
information
concerning
one
axis
into
the
storage
of
another
axis |
| AXIS INVERSION | The
reversal
of
normal
plus
and
minus
values
along
an
axis
which
makes
possible
the
machining
of
a
left-handed
part
from
right-handed
programming
or
vice-versa.
Same
as
mirror
image |
| AXIS NAME | Name given to an axis controlled by the CNC or PMC. |
| AXIS NUMBER | Number used to associate an axis name used in programming with the recognition
number (controlled axis number) of the CNC control section and the
recognition number (servo axis number) of a machine drive motor. |
| AXIS RECOMPOSITION (TWO-PATH CONTROL FUNCTION) | Two-path synchronous, composite, and superposition control. |
