I am having trouble establishing a procedure to interface Mach3 -> Smoothstepper -> Gecko 540 -> NowForever VFD and controlling my Lathe Spindle linearly. The various resources on the Mach support forum have given me several pieces of the solution. The final part seems to be the parameters effecting the response of the VFD to the output of the Gecko. Any insights would be appreciated. Anyone actually have an identical or similar setup?

thanks
bill a.