Advanced Search

It is a CEE 16A five pin. No changes on the wall, socket or cable. The MAHO has been working without wiring change from this socket for about 6 years.

Yes, neutral is wired in, but unused by the machine. Since the original Phillips PC used 110VAC generated by the 6T1, I wired the LinuxCNC PC and monitor into the same service.

Okay, this got weirder. I just went down to the machine,  manually switched off 1Q1 (I misunderstood that as Q1), plugged in and switched the machine on (with Q1, the main power switch), and PC powered up normally. Switched Q1off, reset 1Q1 to on, switched the machine on again, and it again powered up the PC normally. measured 114VAC between pins 150/151.  I could see from the Mesa LED's that the 24VDC rail 204 was also powered. I changed nothing other than waiting a couple of hours and plugging / unplugging the socket a couple of times.

Writing this, I just realised I need to open up that CEE plug on the machine cable, and see if I have a loose connection in there.

That wire is on a 5V regulator pin, so maybe related, hard to tell.

Yes, NCV7608s are obsolete, we do have spares if you need a few.

Thanks, Tommy.
The shop is heated and very dry, especially during the German winter, so moisture is probably not the issue.
-
Max

Picture 2, that looks like arcing across those two parts, moisture can do that, but the rest of the boards look like there is no moisture in quantities to cause that.

With Q1 open, what do you have between L1,L2,and L3?

Is the neutral wired on the machine?
What connector is used at the wall?
Was that connector or the wall socket changed before the incident?
-
Assuming using industrial 16A or 32A plugs, they can easily be miss wired by switching neutral and one of the phases, be it on the wall or on the machine plug.
When no neutral is used, usually not much happens, but when neutral is used that causes ... things to happen.
Mentioning this as it happens a lot where i live.

Does anyone use jmc integrated servos with a 7i77?
I know they work with pulse/dir but in the manual they mention some kind of external analog instruction, but nothing about +/-10v.
Or is there any other other possibility to drive them with a 7i77?

Manual:
www.rocketronics.de/download/datasheet/i...v_v6_2020_manual.pdf

Those should be a complete mechanical set, so no need for BOM.
One thing that i noticed just from a quick glance there, all those say weight is 140KG, impossible due to huge size differences, so that is lazy on their part. I feel bad for other Germans, i have a lot of respect for their punctuality, now this....and the bureaucracy.

Thank you for your response, Peter.
Is the NCV7608 still available? I only found one listing on Aliexpress, which makes me wonder if it’s becoming hard to source.

While taking a closer look at the board, I found a small piece of cut wire lying around in that area:
 
 

Could this have caused the issue?If not, what else could I check to resolve the 5V overvoltage?
The 7i85S is powered via the 25-pin connector from the 7i76E.
Thanks again for your help!
–
Max

Much better, move on to wiring and making chips!
Keep an eye when starting LinuxCNC if it complains about latency, it shows a warning usually when enabling it or later during use.