An observation about bluetooth dongle and Mach. About a year ago I tried transferring gcode files to the machine pc through bluetooth dongle. Whenever I used bluesoeil software with the mach3 loaded it resulted in making my axes speeds extremely slow. And this thing could only be rectified by copying an older xml file to the current one. This didn't happen if I transferred the files after exiting Mach3. I haven't tried bluetooth on any of my machines since then. I wonder what was the cause then.
Zafar