Hurco winmax, Programming Manual, Page: 89 / 254

WinMax Lathe NC Programming
704-0115-307
Basic NC G Codes
2-41
G90 - Absolute Programming (default)
You can use absolute (G90) or incremental (G91) dimensions directly from the
blueprint. Most part programs should begin with a G90 Absolute command that moves
the tool to a fixed position on the machine. Once the start point is defined, you can study
the part blueprint and determine whether to use G90 Absolute or G91 Incremental
dimensions.
G90 establishes a modal setting that tells the control to interpret all XZ endpoint
dimensions in absolute coordinates. G90 Absolute Programming specifies that all tool
endpoint positions are measured from the current part zero position.
Default—Yes
Modal—Yes
Cancels G91
Cancelled by G91
Most part programs should begin with a G90 command to establish part zero. This setting
remains active until you program G91 to select incremental dimension programming. A
program may switch between G90 Absolute mode and G91 Incremental mode at any
time.
Absolute dimensions are measured from part zero. The figure shows the path that the
tool center will follow.
Figure 2–27. Absolute Dimensions