Bridgeport Boss 8 RS-232 question

I'm trying to help a guy I know get a Bridgeport Boss 8 CNC working through the serial port. Because this does not pertain to "building" a CNC I am soliciting responses OFF the list. If I end up getting this machine then I'll convert it and will get feedback ON the list!!! Incidentally, that machine "sings" up a storm when the servo amps are on. I noticed that it is using encoders only, no tachometer. Made me wonder.... if you use a tach is the system "quieter"? If not, what is the advantage of using a tach? Seems like a lot of added work. Now those are topics that do belong on the list. Therefore, if someone would like to comment on those (not the BPort problem) please feel free to do so.

--Alan


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