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\viewkind4\uc1\pard\qc\cf1\lang2057\b\f0\fs24 G21 Metric Programming\cf2
\par \b0\fs20
\par \pard The machine controller can be programmed in either Imperial (inch) unit input (G2\f1 0) or Metric (millimetre) unit input (G21). The standard format for a CNC part program is to write the G20 or G21 code in the first block of the program.
\par
\par G code. Type. ..Units. Lowest input value.
\par G20 Imperial ..Inch 0.0001 inch
\par G21 Metric ..Millimetre 0.001 mm\cf1\b\fs24
\par \f0
\par }