Okuma Alarm-B 2709 Sub-spindle synchronization interlock
M151 command is designated when the conditions for designating sub-spindle synchronized rotation command are not satisfied.
3->Both spindle chucks are clamped.
4->M151 command is designated while the C-axis is being jointed.
Probable Faulty Locations
: M123 SC=100 M51 :
Measures to Take
Check the program