G21 G90 G17
(Source basis: LinuxCNC src/emc/rs274ngc/rs274ngc_pre.cc init reads [TRAJ] SPINDLES from INI_FILE_NAME.)
(Source basis: LinuxCNC src/emc/rs274ngc/interp_convert.cc M51 without $ applies to all configured spindles.)
M51 P0
M51 P1
M30