Gildemeister NEF 480 Retrofit

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28 Mar 2021 14:29 #203906 by db1981
hi,

have there been Fanuc DC Drives in the cabinet original like in my machine?

then this trafo will output something between 3x 100-150V. I can check this in detail, next time i am near to the cabinet...

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28 Mar 2021 14:47 #203908 by anfänger
Yes I had the Fanuc 110 dc drives.
I would be great If you can check on yours. I tried my documentation but there was nothing about the power supplies.

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29 Mar 2021 14:20 #204038 by RotarySMP
The Lichuan manual refers to connecting 230VAC into two terminals of the 230VAC 3-Ph inputs. I have read that most invertors can be run on single phase, be it with a derate.

Have you seen more specific information regarding what "trouble" beyond a loss of full power comes from running on single phase?
Mark

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29 Mar 2021 14:35 - 29 Mar 2021 14:40 #204042 by Aciera
You could just try 400V on 1U1-1V1-1W1 and see what you get on the other 1Ux-1Vx-1Wx.

Just make sure you use a proper CAT III multimeter and not some cheap junk.

[edit]

But really I'm not sure it's worth the trouble. I think you should get plenty of power with just the one phase.
Last edit: 29 Mar 2021 14:40 by Aciera.

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29 Mar 2021 15:11 #204051 by andypugh
Most 3-phase inverters have a 3-phase bridge as the input.
Running on single phase you are only using 4 out of 6 diodes.
Also, the ripple voltage in the caps will be higher.
But other than that, unless the inverter has phase-loss monitoring it won't even know.

The increased ripple is the reason to de-rate.

You can even, apparently, re-configure the input stage to a Delon doubler, and get 400V from 240V input. But then you really have to derate a lot as the difference between half-wave rectification and 3-phase is pretty high.

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29 Mar 2021 15:15 #204054 by anfänger
The trouble I have is, that i'ts getting smoking hot. Even in standby.
So I am not sure if it's ok. Still waiting for some feedback from Lichuan. And don't test the second driver.
I have nothing against using single phase, except the smoking.

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29 Mar 2021 15:18 #204055 by Aciera

The trouble I have is, that i'ts getting smoking hot.


yeah, that does not sound right.

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05 Apr 2021 16:09 - 05 Apr 2021 17:25 #204914 by anfänger
Still no real progress with the servos.
When connecting Two or three phases I blow allways a fuse.
When using 1phase and neutral The drives struts but is getting hot.
the old 100V DC for the servo drives used a single phase transformer, so I can't use this ir generate 220V three phase from 400V three phase.
And no feedback from Lichuan yet.
I am kind of stuck here.
It also looks like I killed my handwheels, they don't work anymore. I am not sure if they got 24V instead if 5v while doing the first tests.
Also still waiting for spare parts to fix the oil system.

I started think the project is too much for my skills. To get me on other thoughts I cleaned the courtyard and did some work in the Garden.
But the the weather changed and I can't stop with the lathe now. I have come to far. So back to the lathe.
I Updates probe basic and qtpyvcp and started to Check the IO's and update the Hal files where I made changes during wiring.

I hardwired the power for the chuck control to the spindle enable signal.
So as soon as the spindle starts the chuck can't be unclamped:



And I gave the spindle Motor a brief test:



After this successful test I can start to configure the VFD to be controlled by linuxcnc. And it at least some small progress.
Last edit: 05 Apr 2021 17:25 by anfänger.

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06 Apr 2021 07:05 #205046 by db1981
What Typ of Lichuan Drives are this exactly? (Typ Plate...)

Wiring them up with single Phase 230V should give no problems.

I was not able to get on the cabinet doors right now. I parked them at an outside wall from the storage, and sadly at the moment there are a tons of open air stages parts are stored around them.

How far is "Montabaur" from your location?

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06 Apr 2021 09:52 #205058 by anfänger
I found wiring diagram for the powersupply and the three phase transform is a low voltage one and the 100V are made out of a single phase Transformer.
Montabaur ist 160km form me.
I have the A4 :
servo.xlichuan.com/ProductsStd_209.html

As far as I understood it should work with single phase 230V AC.
I write to Lichuan again to confirm. with 230V the control loop is running well. But the main loop is getting hot. I am not sure if the first drive has a problem or I overlooked something.
Maybe I take the risk and try to switch on the second drive. Or start to set them up without the main loop.

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