We have a Hankook PT-100 CNC Lathe with a Fanuc 16T-C control that intermittently will start the spindle when you don't expect it. The spindle motor and controller are Fanuc. If you are running a program and want to check size by hitting feed hold and then cycle stop the spindle will stop but then it will start unexpectedly. So far this has only happened while in a program, never in manual. Just the motor starts, no axis movement. This is a larger machine and this is dangerous, any ideas?