Hi Bruce,

If the spindle starts using MDI then your ports and pins must be setup correctly.

MDI just stands for "manual Data input " and it's no different starting the spindle than if you was starting the spindle via the G-code file or using the F5 screen button. They both use the G3/G4 G-code command, so if the spindle starts using this method then ports n pin setup must be correct because if not then G3/G4 would have no affect. Neither would pressing F5 on the screen because all it effectively does is call a OEM code behind the scenes that is basiclly the same as typing G3 or G4 in MDI.

Have you checked the G-code file does have a G3 or G4 command.?