
WinMax Lathe NC Programming
704-0115-307
ISNC G Codes
4-85
G91 - Incremental Programming
G91 applies to Macro Mode B and establishes a modal setting that tells the control to
interpret all XZ endpoint dimensions in incremental coordinates. G91 Incremental
Programming specifies that all tool endpoint positions are measured from the tool's
position at the start of the motion. This setting remains active until you program G90 -
Absolute Programming (default) to select absolute dimension programming. A program
may switch between G90 Absolute and G91 Incremental at any time within a part
program.
Default—No
Modal—Yes
Cancels G90 - Absolute Programming (default) (Mode B)
Incremental dimensions specify the distance that the tool must move during each block
(i.e. the distance from the start of the move to the end of the move).
Figure 4–34. G91 Incremental Dimensions (Mode B)
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