2.2 Dimensions in metric units and inches: G70/G71

1. G70:Inch dimensional notation

2. G71:Metric dimensional notation

Example:

N10 G70 G94 G01 X10 Z30 F100                 ; Inch dimensional notation

N20 G01 X40 Z50                                           ;G70 remains active

…

N100 G71 G01 X19 Z17 F80                         ; Metric dimensional notation from here

Explanation:

1. Inthe metric system, if the program appears inG70instruction, butuntil theM02 / M30 block, G71 is notprogrammed, then after the end ofthe program, it recoveryto metric system. If it was reset during running, it will also return tothe metric system;

2. G70/G71 affect the coordinatesdisplayed by HMI;

3. G70 or G71 evaluates all geometric parameters that directly refer to the workpiece,  eitheras inches or metric units, for example: X \ Z, CR=, CHF/CHR/RND, I\K.