Enter Your Email Address Here

Fanuc Machine G-codes List



List of G-codes commonly found on Fanuc and similarly designed controls
Code
Description
Milling
( M )
Turning
( T )
Corollary info
G00
Rapid positioning
M
T
On 2- or 3-axis moves, G00 (unlike G01) does not necessarily move in a single straight line between start point and end point. It moves each axis at its max speed until its vector is achieved. Shorter vector usually finishes first (given similar axis speeds).
G01
Linear interpolation
M
T
The most common workhorse code for feeding during a cut. The program specs the start and end points, and the control automatically calculates (interpolates) the intermediate points to pass through that will yield a straight line (hence "linear"). The control then calculates the angular velocities at which to turn the axis lead screws. The computer performs thousands of calculations per second.
G02
Circular interpolation, clockwise
M
T
Cannot start G41 or G42 in G02 or G03 modes. Must already be compensated in earlier G01 block.
G03
Circular interpolation, counterclockwise
M
T
Cannot start G41 or G42 in G02 or G03 modes. Must already be compensated in earlier G01 block.
G04
Dwell
M
T
Takes an address for dwell period (may be X, U, or P)
G05 P10000
High-precision contour control (HPCC)
M
Uses a deep look-ahead buffer and simulation processing to provide better axis movement acceleration and deceleration during contour milling
G05.1 Q1.
Ai Nano contour control
M
Uses a deep look-ahead buffer and simulation processing to provide better axis movement acceleration and deceleration during contour milling
G07
Imaginary axis designation
M
G09
Exact stop check
M
T
G10
Programmable data input
M
T
G11
Data write cancel
M
T
G12
Full-circle interpolation, clockwise
M
Fixed cycle for ease of programming 360° circular interpolation with blend-radius lead-in and lead-out. Not standard on Fanuc controls.
G13
Full-circle interpolation, counterclockwise
M
Fixed cycle for ease of programming 360° circular interpolation with blend-radius lead-in and lead-out. Not standard on Fanuc controls.
G17
XY plane selection
M
G18
ZX plane selection
M
T
On most lathes, ZX is the only available plane, so no G17 toG19 codes are used.
G19
YZ plane selection
M
G20
Programming in inches
M
T
Somewhat uncommon except in USA and (to lesser extent) Canada and UK. However, in the global marketplace, competence with both G20 and G21 always stands some chance of being necessary at any time. The usual minimum increment in G20 is one ten-thousandth of an inch (0.0001"), which is a larger distance than the usual minimum increment in G21 (one thousandth of a millimeter, .001 mm, that is, one micrometer). This physical difference sometimes favors G21 programming.
G21
Programming in millimeters (mm)
M
T
Prevalent worldwide. However, in the global marketplace, competence with both G20 and G21 always stands some chance of being necessary at any time.
G28
Return to home position (machine zero, aka machine reference point)
M
T
Takes X Y Z addresses which define the intermediate point that the tool tip will pass through on its way home to machine zero. They are in terms of part zero (aka program zero), NOT machine zero.
G30
Return to secondary home position (machine zero, aka machine reference point)
M
T
Takes a P address specifying which machine zero point is desired, if the machine has several secondary points (P1 to P4). Takes X Y Z addresses which define the intermediate point that the tool tip will pass through on its way home to machine zero. They are in terms of part zero (aka program zero), NOT machine zero.
G31
Skip function (used for probes and tool length measurement systems)
M
G32
Single-point threading, longhand style (if not using a cycle, e.g., G76)
T
Similar to G01 linear interpolation, except with automatic spindle synchronization for single-point threading.
G33
Constant-pitch threading
M
G33
Single-point threading, longhand style (if not using a cycle, e.g., G76)
T
Some lathe controls assign this mode to G33 rather than G32.
G34
Variable-pitch threading
M
G40
Tool radius compensation off
M
T
Kills G41 or G42.
G41
Tool radius compensation left
M
T
Milling: Given right hand-helix cutter and M03 spindle direction, G41 corresponds to climb milling (down milling). Takes an address (D or H) that calls an offset register value for radius.
Turning: Often needs no D or H address on lathes, because whatever tool is active automatically calls its geometry offsets with it. (Each turret station is bound to its geometry offset register.)
G42
Tool radius compensation right
M
T
Similar corollary info as for G41. Given right hand-helix cutter and M03 spindle direction, G42 corresponds to conventional milling (up milling).
G43
Tool height offset compensation negative
M
Takes an address, usually H, to call the tool length offset register value. The value is negative because it will be added to the gauge line position. G43 is the commonly used version (vs G44).
G44
Tool height offset compensation positive
M
Takes an address, usually H, to call the tool length offset register value. The value is positive because it will be subtracted from the gauge line position. G44 is the seldom-used version (vs G43).
G45
Axis offset single increase
M
G46
Axis offset single decrease
M
G47
Axis offset double increase
M
G48
Axis offset double decrease
M
G49
Tool length offset compensation cancel
M
Kills G43 or G44.
G50
Define the maximum spindle speed
T
Takes an S address integer which is interpreted as rpm. Without this feature,G96 mode (CSS) would rev the spindle to "wide open throttle" when closely approaching the axis of rotation.
G50
Scaling function cancel
M
G50
Position register (programming of vector from part zero to tool tip)
T
Position register is one of the original methods to relate the part (program) coordinate system to the tool position, which indirectly relates it to the machine coordinate system, the only position the control really "knows". Not commonly programmed anymore because G54 to G59 (WCSs) are a better, newer method. Called via G50 for turning, G92 for milling. Those G addresses also have alternate meanings (which see). Position register can still be useful for datum shift programming.
G52
Local coordinate system (LCS)
M
Temporarily shifts program zero to a new location. This simplifies programming in some cases.
G53
Machine coordinate system
M
T
Takes absolute coordinates (X,Y,Z,A,B,C) with reference to machine zero rather than program zero. Can be helpful for tool changes. Non modal and absolute only. Subsequent blocks are interpreted as "back to G54" even if it is not explicitly programmed.
G54 to G59
Work coordinate systems (WCSs)
M
T
Have largely replaced position register (G50 and G92). Each tuple of axis offsets relates program zero directly to machine zero. Standard is 6 tuples (G54 to G59), with optional extensibility to 48 more via G54.1 P1 to P48.
G54.1 P1 to P48
Extended work coordinate systems
M
T
Up to 48 more WCSs besides the 6 provided as standard by G54 to G59. Note floating-point extension of G-code data type (formerly all integers). Other examples have also evolved (e.g., G84.2). Modern controls have the hardware to handle it.
G70
Fixed cycle, multiple repetitive cycle, for finishing (including contours)
T
G71
Fixed cycle, multiple repetitive cycle, for roughing (Z-axis emphasis)
T
G72
Fixed cycle, multiple repetitive cycle, for roughing (X-axis emphasis)
T
G73
Fixed cycle, multiple repetitive cycle, for roughing, with pattern repetition
T
G73
Peck drilling cycle for milling - high-speed (NO full retraction from pecks)
M
Retracts only as far as a clearance increment (system parameter). For when chipbreaking is the main concern, but chip clogging of flutes is not.
G74
Peck drilling cycle for turning
T
G74
Tapping cycle for milling, left hand thread , M04 spindle direction
M
G75
Peck grooving cycle for turning
T
G76
Fine boring cycle for milling
M
G76
Threading cycle for turning, multiple repetitive cycle
T
G80
Cancel canned cycle
M
T
Milling: Kills all cycles such as G73, G83, G88, etc. Z-axis returns either to Z-initial level or R-level, as programmed (G98 or G99, respectively).
Turning: Usually not needed on lathes, because a new group-1 G address (G00 to G03) cancels whatever cycle was active.
G81
Simple drilling cycle
M
No dwell built in
G82
Drilling cycle with dwell
M
Dwells at hole bottom (Z-depth) for the number of milliseconds specified by the P address. Good for when hole bottom finish matters.
G83
Peck drilling cycle (full retraction from pecks)
M
Returns to R-level after each peck. Good for clearing flutes of chips..
G84
Tapping cycle, right hand thread,M03 spindle direction
M
G84.2
Tapping cycle, right hand thread, M03 spindle direction, rigid tool holder
M
G90
Absolute programming
M
T (B)
Positioning defined with reference to part zero.
Milling: Always as above.
Turning: Sometimes as above (Fanuc group type B and similarly designed), but on most lathes (Fanuc group type A and similarly designed), G90/G91 are not used for absolute/incremental modes. Instead, U and W are the incremental addresses and X and Z are the absolute addresses. On these lathes, G90 is instead a fixed cycle address for roughing.
G90
Fixed cycle, simple cycle, for roughing (Z-axis emphasis)
T (A)
When not serving for absolute programming (above)
G91
Incremental programming
M
T (B)
Positioning defined with reference to previous position.
Milling: Always as above.
Turning: Sometimes as above (Fanuc group type B and similarly designed), but on most lathes (Fanuc group type A and similarly designed), G90/G91 are not used for absolute/incremental modes. Instead, U and W are the incremental addresses and X and Z are the absolute addresses. On these lathes, G90 is a fixed cycle address for roughing.
G92
Position register (programming of vector from part zero to tool tip)
M
T (B)
Same corollary info as at G50 position register.
Milling: Always as above.
Turning: Sometimes as above (Fanuc group type B and similarly designed), but on most lathes (Fanuc group type A and similarly designed), position register is G50.
G92
Threading cycle, simple cycle
T (A)
G94
Feedrate per minute
M
T (B)
On group type A lathes, feedrate per minute is G98.
G94
Fixed cycle, simple cycle, for roughing (X-axis emphasis)
T (A)
When not serving for feedrate per minute (above)
G95
Feedrate per revolution
M
T (B)
On group type A lathes, feedrate per revolution is G99.
G96
Constant surface speed (CSS)
T
Varies spindle speed automatically to achieve a constant surface speed. See speeds and feeds. Takes an S address integer, which is interpreted as sfm in G20 mode or as m/min in G21 mode.
G97
Constant spindle speed
M
T
Takes an S address integer, which is interpreted as rev/min (rpm). The default speed mode per system parameter if no mode is programmed.
G98
Return to initial Z level in canned cycle
M
G98
Feedrate per minute (group type A)
T (A)
Feedrate per minute is G94 on group type B.
G99
Return to R level in canned cycle
M
G99
Feedrate per revolution (group type A)
T (A)
Feedrate per revolution is G95 on group type B.

Followers

Face book

Twitter Delicious Facebook Digg Stumbleupon Favorites More