Yaskawa YASNAC PC NC Programming Manual - Manual (Page 83)

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YASNAC PCNC Programming Manual Chapter 3: Movement Control Commands
FIGURE 3.4.3.1: Tool Position Offset Function
(b) G code for specifying the direction of offset
Whether the tool position offset is processed in extension or contraction is determined by
the sign of the tool offset amount specified by a D code and the G code specified to call up
the tool position offset function as indicated in the table below.
However, the tool offset amount to be used in the G45 to G48 function should be stored
with the positive sign.
Table 3.4.3.2 Sign Assigned to Tool Offset Data
Sign of Tool Offset Amount (H code)
Positive Negative
G45 Extension Contraction
G46 Contraction Extension
G47 Double-extension Double-contraction
G48 Double-contraction Double-extension