Hi Rob,
I set it to 1 and I can start the spindle. So thank you. What is not working is the speed adjustment. If I reduce 1 or 100 percent the SRO 100 on the lower right corner of mach3 Program Run tab, it reduces the speed to apx 11000 rpm. In Ports and Pin, spindle setup tab, I.ve got PWN BASE FREQ set to 100 and MINIMUM PMV to 75. I guess this is the equivalent of 18000 rpm, as I read online, I should not go lower than that as it gets the spindle hot. In Config, Spindle pulley tab, I.ve set pulley nr 1, minumum 18000 maximum 24000, ratio 1. So again, what did I mess up?