Hey Andy I am just going through all the replies now.
So what I think happened is I put like 300 volts possibly through the servo motor. Not just 24 volts. as I had a cheap chinese power supply that was floating and not tied to ground. It was a big spark that jumped to the steel and it blew the end of the limit switch wire to bits and made a big black burn mark on the steel panel. I will go and check the insulation before I wire it up. But I think it should be all good. and the brake switching system needs a relay I think. a contact opens in the drive at whatever timing I set with parameters and that contact will run another contact cutting the 24 volt power to the brake solenoid. I wasn't actually using that. I just had the brake locked open all the time while I was testing. I already had the X and Y axis working fine and was just connecting up the Z axis when everything went downhill. I am getting confused between the different methods of tying the various powersupplies to the frame ground, so I have made a drawing here which explains how I think I should be wiring this control panel. If you just have a look at this I think it might simplify things. link to drawing on google drive <https://drive.google.com/file/d/1rJYzUGXLrSKuDARQ878wc5RlkjgPqSCr/view?usp=sharing> Remembering that I have 400 volts three phase power here in New Zealand and 240 volts single phase. Which you can make by taking a one of the three phases and the neutral wire. here is the servo drive manual. It is not perfect and is more of a general manual so if it looks wrong it probably is. But then I just ask Bill on whatsapp what to do and he asks the engineers. yuhai servo drive manual <https://drive.google.com/file/d/17inZoRboGQP3lqn0KHd343NlmDQ1CxzS/view?usp=sharing> . Regards Andrew On Thu, Dec 26, 2019 at 11:53 PM Andy Pugh <bodge...@gmail.com> wrote: > > > > On 26 Dec 2019, at 06:49, andrew beck <andrewbeck0...@gmail.com> wrote: > > > > That meant that the brake actually had a lot more than 24 volts in > > it relative to machine earth(like 200v I am guessing, it was a big bang!) > > That shouldn’t normally matter. I would be very surprised if the brake > winging insulation wasn’t good for 24V. > > I think you should check the brake, make sure that it isn’t leaky. Does > your electrician have an insulation tester? > > Is frame ground also a zero-volt reference for logic and field wiring? You > sound to be using the terms semi-interchangeably. > > What is the brake switching device in the drive? > > > > _______________________________________________ > 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
