On Saturday 24 August 2019 15:01:51 John Dammeyer wrote: > > > 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. > That sounds more like a ground loop. You may want to check that, or run a bidi rs485 all the way, which should be compatible with the 422 once converted back to ttl at the end. $2 & change a copy on fleabay.
> 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? So far in my old $dayjob as a broadcast engineer experience, only proof the fee has been paid once is adequate. And the guys at the shack on the border officially don't give a shit if it spends 2 weeks out in the weather, raining everyday while its waiting on the forms. I've had to put stuff from Norpack in the stations kitchen oven at 150F for a day or 2 to get it dry enough to plug in a line cord for a smoke test a couple times. That does not a happy camper make. Getting adequate paperwork for that was such a pain for stuff CBS bought from north of the border was such a headache that the 3rd time that gismo had to be sent north for service (they didn't give us schematics) that I sent it to CBS to make the headache theirs. I got it back faster too.. It was eventually replaced with a US made product. It too was a piece of junk, but did have schematics. Nap time... > John > > > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
