[LUCIFERNIETZSCH]

hi there guys i had the three wires coming from the okuma to the transformer in the wrong terminals. after i turned it on i heard two loud implosions or explosions
i have all wires in the right order but the control doesn't come on any more
what do you think is blown up?
i have EXP126-0A Power Supply 24VDC and right next to it transformer E2565-254-409 a burning smell was evident but not sure.
thanks i really appreciate the help.

[machinehop5]

...onch..that hurts. I would suspect all Power Supplys need checking...What machine model do you have?... may help looking for doc's

DJ

[Algirdas]

transformer itself first of all. Next, check if there are some three phase motors ( fan, hydaulic pump and maybe coolant pump ) powered directly from three phases after the transformer. The power unit maybe burned out - that's why control doesn't start anymore. Check the VFD's ( servos ) as well. Is the display CRT or LCD ? CRT maybe blown out.

[LUCIFERNIETZSCH]

transformer itself first of all. Next, check if there are some three phase motors ( fan, hydaulic pump and maybe coolant pump ) powered directly from three phases after the transformer. The power unit maybe burned out - that's why control doesn't start anymore. Check the VFD's ( servos ) as well. Is the display CRT or LCD ? CRT maybe blown out.

the transformer appears to be fine since I turn it on i see lights coming on and "01" on the drive unit can the GOMI transformer be bad? how would you test /troubleshoot?

[LUCIFERNIETZSCH]

...onch..that hurts. I would suspect all Power Supplys need checking...What machine model do you have?... may help looking for doc's

DJ

all the power supplies? isn't there just one? okuma lB35 99

[machinehop5]

...5v, 12v, 24v there are many voltages supplied that are transformed.

[LUCIFERNIETZSCH]

...5v, 12v, 24v there are many voltages supplied that are transformed.

i have part number 1911-2523-64-148 this is the power supply (behind the CNC control) that I THINK is not working? the power supply itself doesn't seem to have a part number it's sold as a unit.
if i measure the voltage coming in is not exactly 100 v i am getting round 8.65

(red wires ) AE501
would you know where this originates from? is my battery bad perhaps?
there is also a set of boards FNDR could they be faulty?

[machinehop5]

...look for anything burned or smells burned...Anything marked for voltages on the wires or boards? If, not you need the wiring diagrams of the machine to repair anything.

DJ

[Algirdas]

where is this 8,65V instead of 100V ?

[LUCIFERNIETZSCH]

where is this 8,65V instead of 100V ?

shouldn't it be reading 100? if you measure AE501 and A100? i am reading 8 .6

[LUCIFERNIETZSCH]

...look for anything burned or smells burned...Anything marked for voltages on the wires or boards? If, not you need the wiring diagrams of the machine to repair anything.

DJ

i have the electrical drawing i was looking here

[Algirdas]

check the resistance. Looks like short connection there.

[machinehop5]

i have all wires in the right order but the control doesn't come on any more
what do you think is blown up?
transformer E2565-254-409 a burning smell was evident but not sure.
thanks i really appreciate the help.

...I would start with Power OFF going to the machine completely ....than with an Ohm meter check the Transformers for Open/Shorted windings. Photos help.

DJ

[Algirdas]

with an Ohm meter check the Transformers for Open/Shorted windings

teach me also, how to find transformer's shorted windings with ohmmeter
my idea is to check power consumer side for shorts.

[LUCIFERNIETZSCH]

...I would start with Power OFF going to the machine completely ....than with an Ohm meter check the Transformers for Open/Shorted windings. Photos help.

DJ

thanks, Dj i will do that but when you say transformers? my step down canadian transformer as well as the 2kva okuma transformer?E2565-254-409 ?
also i forgot to mention that i am supposed to receive 8.6v when control OFF and 11.8v with the control ON!!!!!
however i only get this number if i remove this fuse here what's your analysis on this?


i measure 8.6ish with the way it is. i remove this fuse , i measure 11.8ish

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[LUCIFERNIETZSCH]

found the problem. OKUMA OPUS7000 POWER SUPPLY problem resolved; the second power supply is at the bottom in the rack where all the boards are. here is the part number for those interested. E0451-521-094
if you want this unit repaired contact me. or any power supply units for that matter.