I use USB mice and keyboards on my LinuxCNC machine, it works fine.  USB 
doesn't work for hooking up the motion control hardware itself, but it works 
fine for everything else.

RS232 is not well suited for motion control hardware.  The parallel port is 
much better.


On Jul 31, 2012, at 16:49 , jeremy youngs wrote:

> So ive been thinking (that might not be good :)   in the effort to
> eliminate usb devices what are do you use for mice and key boards? I
> understand ps/2 if you are using an OLD machine, im running a 5 yr old dell
> optiplex 640 dual core 2.8 ghz 2 gig ram and only an rs232 besides the
> parport. So can one use an rs 232 to usb adapter for human interface to
> avoid interupts? im not having problems just wondering and trying to reduce
> latency. Also can one use the rs232 for i/o in lieu of a parport card?
> 
> 
> -- 
> jeremy youngs
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Sebastian Kuzminsky


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