On Saturday 09 October 2021 15:22:29 Peter Hodgson wrote: > Hi John, > > Thanks for sharing the drawing. Yes, I would like to get things > properly drawn when I get the time. > > In the mean time....... would you mind having a quick look at the > revised schematic on the following link to check I have placed the > capacitors you suggested in the correct place when using the HCPL2631 > ?? > > https://www.purbrookengineering.com/index.php?option=com_content&view= >article&id=11 > > > I notice on your drawing you have 'Earth' and FGND. What's the > difference? > > Pete > That looks better, as long as the opto's are fast enough. Verify that with a o-scope. And the halscope is not fast enough, use a real one. But please don't use yellow on white for the signal wires, they disappear in the pdf. :(
> On 09/10/2021 18:18, John Dammeyer wrote: > > Hi Peter, > > I find it helps to draw a wiring diagram of where things are wired. > > That’s different from a schematic which just shows how things are > > connected. > > > > For example, I've attached the old schematic of my mill wiring > > (before I removed the two HP-UHU drives and wired in the quadrature > > encoder for the spindle into the second Chinese BoB). Note to self: > > Really must update now that I have AC servos on everything. > > > > I have colour codes on there for wiring. But it does not show the > > actual wiring paths. For example the 24V comes out of the Power > > Supply and splits in two directions. One to the DIN Rail for the > > MiniBoB->STMBL drive, the STMBL drive and 24V-16V UHU power supply. > > From there another DIN rail set of terminal blocks to run power out > > to the Bergerda Spindle Interface and now the Bergerda interface > > boards. > > > > But the drawing doesn't actually show the DIN rails or wire lengths > > so there's no way to see if the 24V system has ground loops etc. > > Not from the Schematic. > > > > So I still have to create a new 'mechanical' wiring diagram that > > shows where rather than how things are connected. > > > > John > > > >> -----Original Message----- > >> From: Peter Hodgson [mailto:peterjohnhodg...@gmail.com] > >> Sent: October-09-21 1:38 AM > >> To: Enhanced Machine Controller (EMC) > >> Subject: Re: [Emc-users] Fwd: Rogue Index Pulses > >> > >> Thanks Chris, yes, I will change the shielding ground to the > >> controller end and isolate the case. > >> > >> Is it best practice to run the 5v and 12v �grounds� back to the > >> original 24v power supply 0v? > >> > >>> On 9 Oct 2021, at 00:53, Chris Albertson > >>> <albertson.ch...@gmail.com> wrote: > >>> > >>> ?I'll say what Gene said. I'd bet on a groubing issue. The > >>> schmatic has an error, a groubd wire ismissing and also shows > >>> random crossing grounds. Run everything back to the power supply > >>> minus post. > >>> > >>> Also you be much better if the sheild was grounded to the > >>> controller end. Never us a machine and it's mounting bolts as > >>> grounds. > >>> > >>> > >>> -- > >>> > >>> Chris Albertson > >>> Redondo Beach, California > >>> > >>> _______________________________________________ > >>> 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 > >> > >> > >> _______________________________________________ > >> 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 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, 1940) 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
