Really wierd...
I've done a complete uninstall/reinstall of Mach-3 Version R3.042.029 I removed the original c:\Mach3 folder beforehand and made copies of my two user-writter vb macros M800 and M801. I reinstalled Smoothstepper... went through all the setup steps. This time Windows found Smoothstepper hardware... There must have been a trace in the Registry, Maybe I should do a system restore to a date before Smoothstepper was ever installed.
At any rate, I redid all my Ports & Pins settings and my motor tuning...
Still the same problem. Line N70 of my listed program executes (M800, my Tailstock extend Macro)... "Dwell" comes on (I have no idea why) and "Dwell" stays on until I click the [Cycle Start] button. The program continues on and it executes line N110 (M801, my Tailstock retract Macro)... and "Dwell" hangs again, list like line N70. Everything else executes and continues on without interruption. Oddly enough, Line N40 (which is identical to Line N110) works just fine, even if I extend the tailstock beforehand (so the line will actually do something)
If I hook up the PP and disconnect the SS, everything works.