ah I see thanks for that I couldn't work out how that was supposed to work so that is not going to happen then on the cnc mill. guess I will need to buy chinese servo drives and motors if the existing heidenhain inverter doesn't work and I can't interface with it. apparently it takes a PWM command from the heidenhain main controller via ribbon cables
well I also have a cnc lathe with fanuc 10 m servo motors and a transformer to make 230v three phase which I could then rectify. Not that I know how to do that haha. the servos on the fanuc lathe are only 1.8 kw so I think I would get away with it on those. but the price is quite attractive compared with buying new chinese servo drives and motors etc. regards Andrew On Thu, Jun 4, 2020 at 8:13 PM andy pugh <bodge...@gmail.com> wrote: > On Thu, 4 Jun 2020 at 08:14, andrew beck <andrewbeck0...@gmail.com> wrote: > > > So in a nutshell so long as the 8i20 can accept 400v three phase input > > power I should be OK. > > > The 8i20 takes DC input. > > If you rectify 400V three-phase then you will get 565 V. > > 400V is the RMS voltage. A rectifier charges the capacitor to the peak > voltage, which is sqrt(2) higher. > > Similarly 230V single phase rectified into a capacitor gives a DC supply of > 325V. With overhead for braking and transients, this is the design voltage > for the 8i20 and STMBL. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is designed > for the especial use of mechanical geniuses, daredevils and lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
