I just bought this machine and right before it was sold they upgraded the memory (added a board) and put in a USB interface... I'm having no luck with the tool changer because they deleted the :9000 program sets and unknowing to me until just a little while ago, they had replaced one with what, " they could remember".. I have tried the standard logic behind a tool change with the G91 G28 Z0, followed by an M05 and M19 spindle orient then an M99 to return to the program. I keep getting a program alarm with no number just a red light on the pannel. Can someone show me what the O9001 should look like and are there other O9000 programs that should be there as well? I only have the one in question..... Thank's