I actually worked at a place where we needed to set up tempory networks at military bases. Part of out kit was a 2 km spool of fiber cable. Yes over a mile. It as in a shipping case with a roller and a hand crank. It was easy enough to handle that even untrained random "Army guys" could deal with it ad the Ethernet over tres under highways into a window that was a half mile away. It is completely "plug and play" and not much harder to use than cat-5 cable.
SOme peole use WiFi with two hi-gain antennt facing each other. For that you need a clear line of sigh and MUCH fiddling. Fiber has gigabye speed and is way-easy. On Sun, May 19, 2019 at 10:35 AM Davide <77...@tiscali.it> wrote: > Hi, and thanks for your suggestions. > > > > The driver does support multiple ethernet cards (up to 4) so you could use > a 7i92 (for example) for each motor. Though even then 150m would be > optimistic, I suspect. > > why? isn't it a standard ethernet? I can plug pc eth to a good gigabit > switch and run 4 lines to the winches, or put 2 other switches around and > amplify the signal. > > > I also have in mind to use just one 7i92 near the pc, and build a ttl -> > fiber optic converter using SN75451 (two channel Logic + LED drivers) to > drive some HFBR1414 plugs, which claim to transmit up to 1500 mt (minimum > 500mt) > > > I have a tech question about 7i92. I have only run Lcnc using software > step gen, but I understand that a 7i92 does step generation on its own, > freeing the pc from doing the hard work. But what messages are sent from > the pc? are they just POS/SPEED? and, since I have my untrivial kinematics, > are they always done by the pc, right? > > when I run a latency test I have good results, something like Servo t. > 2-3000 and Base t. 5-7000. Is the 7i92 driver linked to the Servo, or > Base Thread? what Latency time is it needed? and for 4*7i92? > > > I'm sorry for all these questions, but unfortunately I don't have a lot o > f time to experiment, so I need to clarify my mind, before buying a lot of > things.. > > > Thanks, Davide. > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
