Fanuc 0 control power supply blown twice.

Hi everyone....
We have a Hardinge turning centre with Fanuc 0 control. We bought it as a old running machine from Canada. We pluged the machine here in India, machine was ready for operation after few problems but after around 1 hour machine got off with red light on power supply unit. Then we repaired the power supply as its circuit was blown because of overheating because of overload as told by the person who repaired it. Now second time we connected power supply and carefully checked everything before turning it ON again...
The connection of I/O board was done after checking any abnormal condition. checked the 24+, 24E, 5V, 12V after connecting the I/O board connection, everything was looking okay, but the power supply got heat up again and fried again after 1 hour....
so now questions arrising are...
1 Is there any short circuit in the machine but in that case it shouldn't get ON and should show red light as we ON the machine..
2. This could be problem because of input power supply connection? checked input supply which is through stabilizer and through 415 to 200 V transformer.. Machine didn't came with transformer so we connected a spare transformer from other machine. After checking the supply it shows 214V all phase to phase but when checked with earth there is 115 V at R and Y and 135V at B phase. This could be a problem? generaly all transformers for CNC machine are connected star at input side and delta at output side but this transformer we connected is star to star, whereas delta at ouput is done to balance the load. is this could be the problem because of unbalanced power supply..?
3. Or the power supply is not of proper amperes? because we don't know that this is the original one which came when the machine was new. May be someone has changed the power supply before supplying the machine. Power supply which is getting problem now is A16B-1212-0100-01. May be this power supply is underrated for the machine. We didn't get any manual with this machine, now how to check the power rating of this power supply..?
please help here...:mad:

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1: the power supply uses 1 phase power :200V/220V 60Hz or 200V 50 Hz.
2: all output are fuse protected so an overload should blow a fuse.
3: there are 3 power supplies, depending on control configuration. What is your motherboard?

Motherboard A20B-2000-0180/03A......
Memory Board A16B-2201-010.....

that is a large motherboard for 0–C, 00–L, 00–LC controls.
There are actually 5 power supplies for the FS0-C controls.
If you give me you email, I will send the Connection manual PDF (just over 6 Mbyte).
look at page 56 to calculate the proper power supply.
The list below
A A16B–1211–0850
AI A16B–1212–0100
B2 A16B–1212–0110
C3 A16B–1211–0890

Thanks memoryman...
What you think Power supply isn't of proper rating..?? or some other problem is there...??


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Hello i had similar problem years ago. Problem was partial short connection on inductivity MA fixed on body of power supply. Try just to unscrew screw which fixed coil. Good luck

Quote:

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Originally Posted by nsdjole

Hello i had similar problem years ago. Problem was partial short connection on inductivity MA fixed on body of power supply. Try just to unscrew screw which fixed coil. Good luck

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thanks nsdjole but didn't understand what is induntivity MA fixed on body of power supply..
Can you explain a little please..

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Harmeet, if you send me your personal mail ID, I will send to you picture which can explain and fix my poor english skills.
regards

Quote:

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Originally Posted by nsdjole

Harmeet, if you send me your personal mail ID, I will send to you picture which can explain and fix my poor english skills.
regards

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[email protected]
Thanks in advance....

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the power supply may have been replaced with one that has a lower rating.
More likely the components used to repair it were wrong. I may have the diagrams for the supply, but not scanned in.

Quote:

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Originally Posted by memoryman

the power supply may have been replaced with one that has a lower rating.
More likely the components used to repair it were wrong. I may have the diagrams for the supply, but not scanned in.

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Memoryman ...
Can you please check which supply to be used in the machine..
Tomarrow supply is coming back after repair..
I don't want it to be burned again...

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the manual I sent has the information about how to calculate which power supply is correct. It depends on the installed boards.

Problem is still pending guys..
No solution yet

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Quote:

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Originally Posted by memoryman

that is a large motherboard for 0–C, 00–L, 00–LC controls.
There are actually 5 power supplies for the FS0-C controls.
If you give me you email, I will send the Connection manual PDF (just over 6 Mbyte).
look at page 56 to calculate the proper power supply.
The list below
A A16B–1211–0850
AI A16B–1212–0100
B2 A16B–1212–0110
C3 A16B–1211–0890

---

could you send me the connection manual?

[email protected]

The problem was CRT screen was drawing excessive current.
Now current to the CRT load is limited by putting jugad in series to CRT 24V supply.
Now power supply is doing fine.

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Hello boys,

I have same problem with FANUC A16B 1212 0100-01 popwer supply
Green and rad LED is light...but I have no voltages (5V, 24V +-15V)

Can you help me anybody?
Have you got a drawing about power supply?

Thanks

Janos