Reply with QuoteIs t818e a model No? What voltages does it show marked?
Al.
Transformer problem!!
Just got our vmc10 in the shop and ran into a major snag. It was supposed to be 220v 3 phase and when we go to wire it in noticed it has a t818e transformer is there anyway to make this transformer work on 220v 3 phase or did we get screwed and now have to spend another $1700 on a step up transformer? We desperately need this machine running ASAP thanks
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Re: Transformer problem!!
Is t818e a model No? What voltages does it show marked?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Yes the fadals use model number like t812, t813 etc. the sticker on the inside or rear cabinet that has the transformer wiring says 340-510vac 3 phaseOriginally Posted by Al_The_Man
Re: Transformer problem!!
T818e is not a common model. Typically Fadal used a multi-tap transformer. You should be able to use different voltages simply by moving the wires where they should be. Check the inside of the back door for the voltage possibilities.
We have had good luck with our Fadals milling mostly soft steel and aluminum up to 5 axis. We are always looking for spare parts :) If you have a broken down Fadal give a shout.
ok so we got everything wired in and ready but have a issue
We are feeding via a phase converter with output of 244,245,247v across legs but then it goes into a step transformer to convert to 480v
The output of high voltage is 483,485,453v can't figure out why the one leg is 30v low. I've checked the taps on the step transformer and all is good
Can the Fadal transformer in the rear cabinet be tapped at different voltages to account for this
Like something like this-
Tap 2 legs for 480v
Tap the low leg for 450v
??
Re: Transformer problem!!
What is the voltages on the output of the machine transformer in the enclosure, the vast majority of machines are 406/575 just because that is the N.A. common industrial supply,
It is then stepped down to 210/240 & 120v AC, in some case this internal transformer can be by-passed and connected direct to 240/120 it may pay to check.
Spindles are usually the higher voltage users and are 240 3ph in.
IOW it is rare to find 460v components and even 3 ph motors are often dual voltage.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
I'll Check the output of the machine transformer. The machine transformer has taps for 340-510v with jumper settings for about 15 in between those. The spindle does run on 240v 3 phase and then it also steps it to 120v and 90v for other stuff
If I could move the tap on the leg that is 30v low there is a setting for 450v and leave the other two on the 480v taps just not sure if this is acceptable or if it'll mess it up
Re: Transformer problem!!
If the machine electrics is 220/240 after the transformer then it may be possible to by pass the transformer all together and feed it with the 220 3ph you have.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
This is an excerpt from the Fadal manual regarding tapping the machine transformer
"Note: It is acceptable to have the legs tapped differently by one voltage tap position. There should be no more than one position. "
Not sure exactly what they are meaning but are they saying that you can have the legs on different taps but no more than one tap position difference?
Basically two legs could be on the 480v taps and one on the 460v taps? Since the 460 and 480 taps are one position off but you couldn't use the 480 and 450 taps since they are 2 positions apart
Last edited by Cferrell84; 05-28-2016 at 11:01 AM.
Pics of label inside cabinet
Re: Transformer problem!!
The full machine schematic should show the secondary details of the transformer and whether it can be bypassed.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Any idea why the step transformer would be outputting one leg at 30v lower than the other 2
Re: Transformer problem!!
Never EVER seen that on a transformer before?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
It may be my only option to get it close. Tha manual says ideal voltage to the spindle is 220v but 190-240v is acceptable and to the amps and boards is 120v
I fired it up and I'm getting to the spindle inverter
L1-2. 230v
L1-3. 230v
L2-3. 215v
One output to the amps/boards I get.120v
The other output to amps/boards I get 115v
