On 12/2/23 13:00, John Dammeyer wrote:
Replace the electrolytic capacitors in the power supply. If you can get
one of these meters you can verify this is a good solution by measuring the
one of the old ones with a new one.
https://vi.aliexpress.com/item/4001294233271.html
The 3 phase motor controller on our expensive Bosch Fridge failed after 10
years. Replacing the capacitors put the power supply voltages that ran the
motor control part back to the correct value. A new capacitor, IIRC, had an
ESR of about 0.5 ohms. The old one was 30 Ohms. There was no physical
visual indication that there was a problem. Fridge has been running
perfectly now a year later.
John
Also true John, but I was assuming Leonardo does not have a decent ESR
meter. If you don't have one Leonardo, get one, this is a miracle test,
anything over 2 ohms gets replaced. Decent ones start at around 150 USD.
-----Original Message-----
From: Leonardo Marsaglia [mailto:ldmarsag...@gmail.com]
Sent: December 2, 2023 7:58 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] OT Fanuc ot-c cpu power supply A16B-1212-0950
Hello everybody, I hope you're all doing well!
Sorry for the OT but I think this is a good place to ask for what I intend
to do.
One of our lathes has this Fanuc OT-C with this a16b-1212-0950 power
supply
which is now failing. I can only use the lathe a couple of hours before
the
control stops working and the PSU lights its alarm led.
The main problem is, these PSU are pretty expensive when purchased new,
and
the ones refurbished take almost three weeks to arrive in my country.
So, one of my ideas to keep the lathe running before I completely retrofit
it to LCNC is to install generic switching PSUs to match the voltages and
fool the CNC and it's control signals (which I don't know if they are too
complicated to fool but apparently there are only a couple of pins on the
PSU for that purpose, so It shouldn't be that complicated).
Is this nonsense? should I even bother? Because the next step really is to
adapt the machine to LCNC and forget about all these problems once and for
all. But if I can manage to fool the control this could be done in a
couple
of hours.
Thanks as always for your help guys!
Leonardo
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Cheers, Gene Heskett.
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