> > On Saturday 24 August 2019 12:46:28 John Dammeyer wrote: > > > > > I already have my mill running with a single parallel port but > > > > > the single phase motor is still controlled with a switch because > > > > > I'm too lazy to temporarily wire in a relay. What I do have for > > > > > my mill is a sweet Bergerda 1.8kW AC Servo that works very > > > > > nicely with step/dir signals and has a 2500 line encoder (10,000 > > > > > pulses per rev) which means it needs more than the parallel port > > > > > can deliver. > > > > > > > And I can also program in a numerator/denominator pair on the > > > encoder outputs. So I can make the motor encoder appear like one > > > that has 200 pulses per rev. Aside from the poor manual I'm really > > > liking the Bergerda AC Servos. I may be ordering some more in the > > > near future. > > Found the site, chinky of course, Model #? >
The small motor to replace the Automation Technologies Inc 1.27Nm Brushed DC Servo is a 60SM-M0130NAL controlled with the SDD04-NK7D. The big motor for the spindle is a 110SM-M0630ZAL and rated at 1.8kW or just over 2HP replacing a huge 2HP single phase motor. The support from their factory rep in China has been spectacular. English/Chinese is definitely an issue and has led to some confusion but it's nice dealing with the actual factory and the design engineers. I'm not totally happy yet with their ModBus RS422 interface. Once the motors are enabled there is a significant amount of electrical noise coupled onto the communications lines. For an extra charge they will opto-isolate that interface. I'm investigating that avenue but haven't made a decision yet. But all in all I'm finding I'd buy from them again. And in fact perfectly willing to arrange a bulk purchase to save shipping costs but I guess right now for Americans, even talking to China right now is like talking to the devil? Not a problem in Canada so far. I suppose if I value added something to the motor/driver combination to make it "Canadian" then the same duties into the USA might not apply? John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
