Allen,
I don't want to hijack your post, but I am having similar trouble with Mach crashing while using the Galil plugin. Maybe we can resurrect this post. Did you find the solution to the trouble that you were having?
In my case, I have my Galil (DMC-1740) card all configured and communicating using Galil Tools. As far as I can tell, the Galil plugin for Mach is installed correctly. I'm not in front of my machine control computer now but I'll try to summarize. When I start up Mach3 and choose the Galil card, at first it says "Galil card connected!!" then it immediately changes its mind and says "Galil card not communicating!! Restart program!!". After that Mach locks up and I have to go through the task manager to force-close the program.
I've tried changing the IRQ addresses and hexidecimal settings, but have seen no changes. Perhaps there are some other changes to the settings that I could try, like communication rate, etc.?
Regards,
Charles