I'm starting to think that maybe the original PSU had its alarm state triggered by an external fault, maybe on the video card. I'm just guessing because the manuals only say that the PSU has an external alarm contact that will turn off the PSU in case the contact is closed, but It doesn't say what can cause this of course. The matter is, the control doesn't show any alarm on its control leds on the mainboard so I'm not sure.
I don't have any luck finding any documents about the boards or how they should be properly checked. There's only very basic info. El sáb, 9 dic 2023 a las 12:36, Leonardo Marsaglia (<ldmarsag...@gmail.com>) escribió: > Hello guys again > > Just a little update, we fed all the voltages through some test pins on > the main board (not using the original PSU connector yet) and the machine > started up but with no video signal. The LCD monitor lights up but no > signal on the screen. The video board is showing 4.92 volts on its test > pins so it's getting the voltage but maybe there's something missing (I'll > try to increase the 4.92 V to 5.05 V or so, although I don't think that's > causing the problem). All the other systems on the machine are working fine > and there are no alarms present. We're almost there.. > > El sáb, 9 dic 2023 a las 12:17, John Figie (<zephyr9...@gmail.com>) > escribió: > >> Gene >> >> Yes I understand the catastrophic failure mode of Buck converters. But >> what >> is BBLB? >> >> John Figie >> >> On Sat, Dec 9, 2023, 7:39 AM gene heskett <ghesk...@shentel.net> wrote: >> >> > On 12/9/23 06:13, andy pugh wrote: >> > > On Wed, 6 Dec 2023 at 16:08, Leonardo Marsaglia < >> ldmarsag...@gmail.com> >> > wrote: >> > >> >> > >> Just a little update. We're going to try and feed all the voltages on >> > the >> > >> main board of the control (+5V, +15V, -15V, and 24V) with normal >> > switching >> > >> PSUs >> > > >> > > Depending on the current requirements on each channel you might want >> > > to look at using a single PSU and a bunch of buck or boost converter >> > > modules. >> > > >> > > My mill has a 2kw 24V supply and then 4x buck converters (with LED >> > > voltage displays) to feed the PC motherboard, 5V and 12V logic. >> > > >> > Those tend to be BBLB stuff, and I've not had great luck. A to 5 volt >> > buck crowbared thru, putting the full 24 on the 5 volt stuff with the >> > expected results, lots of smoke. Lasted under a year, so I don't >> > consider it since. >> > 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 >> > >> > >> > >> > _______________________________________________ >> > 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
