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
