On Tuesday, January 10, 2012 05:30:32 PM Przemek Klosowski did opine: > On Tue, Jan 10, 2012 at 3:10 AM, Lester Caine <[email protected]> wrote: > > A bit like 'scart' connectors. Many of the commodity connectors are > > designed for > > single use only, plug it in and leave it alone. I've seen some quote > > '10 insertions max'! It would be nice to have a good quality lockable > > connector standard with proper pins ... > > Speaking of connectors, has anyone considered using RJ-45? it's a proven > locking connector that's cheap and rated for over 1A per pin, and the > cables are easy to custom-assemble. What's not to like, I'm asking in > all seriousness? Basically, both the amperage rating and the interconnector voltages of an RJ-45 would be easily exceeded by most of the motors we use.
In my case, the 28 volts = 54 volts peak to peak, a bit above the commonly assumed 50 volts worth of isolation between adjacent pins, not by much, but still... Likewise my 2.74 amps also stretches that current per pin, possibly to the premature failure point again. So no, as a C.E.T., I wouldn't recommend it. What I am using, admittedly at about 10x the cost of an RJ-45, is that 4 pin connector used as a mic connector on CB radios for the last 40 some years. It screws together, so its unlikely to come uncoupled, which if it does while the motor is under power will probably let the smoke out of the drivers. Each contact there can handle 5 or more amps and it is not THAT expensive. A dollop of sili-seal on the back of it and its quite dirt proof too. > I can only think of the confusion factor with the true RJ-45 > ethernet---but surely nobody would plug their ethernet cable into a > stepper :) > ----------------------------------------------------------------------- > ------- Write once. Port to many. > Get the SDK and tools to simplify cross-platform app development. Create > new or port existing apps to sell to consumers worldwide. Explore the > Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join > http://p.sf.net/sfu/intel-appdev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Darling: the popular form of address used in speaking to a member of the opposite sex whose name you cannot at the moment remember. -- Oliver Herford ------------------------------------------------------------------------------ Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
