I have a Mori Seiki SL2H with a Fanuc 3t controller, my question is why when in a program m42 is high gear which is correct.But if you put a larger part in and need to run in low gear M43 it will not run the porgram. The spindle will not start in auto . It works fine running it manuel in high or low , is it just a parameter setting i even tryed to fool it by letting it pickup the off set in m42 and get in position then giving it a m43 dont work