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The following G and M codes are supported by the Control Interface. Click on
the Command name to get more information and examples with the command.
You can find more extensive examples on G-code in the G-code
examples page.
Writing comments in your g-code can be helpful in keeping track of each line.
Comments will also let you "comment-out" a line, so that the line is ignored.
To comment out a line, add a % sign to the start of the line.
The TechnoCNC interface will ignore all lines that begin with a asterisk *,
open parentheses (, percent %, and forward slash /.
Examples
% This line is ignored.
This line is read
( This line is ignored.
Setup Commands
| Code |
Command |
Format |
Purpose |
| S |
Spindle Speed |
S<speed> |
Sets the spindle speed. |
| F |
Feed
Speed |
F<speed> |
Sets the feed rate, or rate of movement of the axes. |
| G4 |
Dwell
Time |
G4/seconds OR G4/-seconds (hundredths) |
Inserts a delay in seconds or hundredths of a second. |
| G90 |
Absolute Coordinates |
G90 |
Sets coordinates to absolute, so that the motion commands are relative
to the origin. |
| G91 |
Incremental Coordinates |
G91 |
Sets coordinates to incremental so that all motion commands are
relative to the previous position. |
| G92 |
Set Absolute Origin |
G92 X<#> Y<#> Z<#> |
Sets the origin that is referenced when in absolute mode. |
| M0 |
Program Stop/Pause |
M0 |
Stops the g-code file from being further processed until the operator
presses Continue or Start. |
| M30 |
End of Data |
M30 |
Marks the end of the file. The rest of the file will not be processed.
|
| M3 or M4 |
Spindle On |
M3
or
M4 |
Starts the spindle. |
| M5 |
Spindle Off |
M5 |
Turns the spindle off. |
| M6 |
Tool Change |
M6 T<#> |
Requests the machine change to the specified tool number. It will turn
off the spindle and coolant and other required operations when it changes
the tool. |
| M7 or M8 |
Coolant On |
M7
or
M8 |
Turns the coolant flow on. |
| M9 |
Coolant Off |
M9 |
Turns the coolant flow off. |
| M90 |
Output Off |
M90 OUT<#> |
Turns the output to the Off or 0 state. |
| M91 |
Output On |
M91 OUT<#> |
Turns the output to the On or 1 state. |
Routing Commands
| Code |
Command |
Format |
Purpose |
| G0 |
Rapid
Move |
G0 X<#> Y<#> Z<#> A<#> |
Moves one or more of the axes at the rapid speed, to the specified
location. Note that not all axes are required to be specified. |
| G1 |
Straight
Line |
G1 X<#> Y<#> Z<#> A<#> |
Moves the specified axes in straight (linear) motion. It will use the
requested feedrate, either from the F command or whatever the cut speed
has been specified to be. This is a cutting move. |
| G2 |
Clockwise Arc |
G2 X<#> Y<#> I<#> J<#>
or
G2 X<#> Z<#> I<#> K<#>
or
G2 Y<#> Z<#> J<#> K<#> |
Moves two axes (XY, XZ or YZ) along the path of an arc in a clockwise
direction. The XY specification is the end position, and the IJ
specification is the center of the arc. |
| G3 |
Couterclockwise Arc |
G3 X<#> Y<#> I<#> J<#>
or
G3 X<#> Z<#> I<#> K<#>
or
G3 Y<#> Z<#> J<#> K<#> |
Moves two axes (XY, XZ or YZ) along the path of an arc in a
counterclockwise direction. The XY specification is the end position, and
the IJ specification is the center of the arc. |
Drill Cycle Commands
| Code |
Command |
Format |
Purpose |
| G80 |
Drilling Cycle Off |
G80 |
Turns a drill cycle off. |
| G81 |
Standard Drilling Cycle Without Dwell |
G81 X<#> Y<#> Z<#> R<#> P<#> F<#> |
Provides a feed-in, rapid-out sequence used for standard drilling
without a dwell time. |
| G82 |
Standard Drilling Cycle With Dwell |
G82 X<#> Y<#> Z<#> R<#> P<#> F<#> |
Provides a feed-in, rapid-out sequence used for standard drilling with
a specified dwell time. |
| G83 |
Peck Drilling Cycle |
G83 X<#> Y<#> Z<#> R<#> Q<#> V<#> P<#> F<#> |
Provides a series of feed=in peck drilling motions with full retract
used for drilling holes. |
| G87 |
Chip Break Drilling Cycle |
G87 X<#> Y<#> Z<#> R<#> Q<#> V<#> W<#> P<#> F<#> |
Provides a series of feed-in rapid-out motions that is similar to peck
drilling, but the retract is a specified distance instead of a full
retract. |
Drill Cycle
Command Format
G8n X<#> Y<#> Z<#> R<#> Q<#> V<#> W<#> P<#> F<#>
| X |
the x coordinate of the hole |
| Y |
the y coordinate of the hole |
| Z |
the z coordinate of the hole |
| R |
the reference height for start of drill plunge |
| Q |
the initial z peck increment |
| V |
the subsequent z peck increment |
| W |
the peck clearance, z retract between pecks |
| P |
the dwell time (in seconds) |
| F |
the drilling feedrate, plunge speed |
| n |
an integer in the range of zero to nine | |
