hey guys just got a quick question
i have a chinese vfd which i am using in closed loop vector control with a 5v differential encoder going to it. the encoder has A A- B B- Z Z- and of course VCC and 0v the vfd outputs a single A and B signal out from vfd and they are optically isolated how would i connect up to 7i77 encoder input? do i take 5v and 0v from mesa card or from vfd? this is a really nice vfd that i think is got all the normal isolation to connect up to other devices the brand is Nietz www.nietz.cn Ps also just so everyone knows i have a 380v vfd here 11kw and they cost 200usd each i bought 7 drives for cnc mills here in new zealand and if i put a 30 usd encoder on a standard motor they allow me to run 150 percent of motor rated torque at 0RPM and lock spindle like a servo drive pretty good for 200 usd pretty cool drives and they did autotune perfectly on this non standard high speed motor that yaskawa and schiender drives both failed on regards Andrew _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
