Electrical Engineering

If you want straight answer yes it should work. But I will come up with a counter question,If you are replacing all 110Volts Items with 220 volts Items, then what could be the possible reason of not working?

Make sure that you have replaced all the items those were supplied by 110Volts,

If you replace with all 110Volts Items with 220 volts Items, it may not work(due to low potential) its purely depends on construction of particular items.

GA redfred

Listen to the voice of reason, uniq_engineers. When i was young, i also made this mistake of thinking that i am smarter than the original designer. Only once, and fortunately, caught myself at the drawing board stage

This is the smarter reply I ever heard in the forum. "When i was young, i also made this mistake of thinking that i am smarter than the original designer.

I am going to have to go against the competent engineer design concept and toss in incompetent bean counters who override good engineering designs to save a few pennies on multi thousand dollar devices.

Too often the multi volt inputs simply came down to the device having multiple sub components designed by independent contractors and not one individual company department.

Some where along the way sub contractor A decided to add the capability for dual voltage to their component but the final stage assemblers at stage Z where told to still use the lower voltage setup since thats what the original design had and that doing a input voltage change on the redesigned sub component would take a bout 20 seconds more and thats too much cost over run for a some bean counter to accept for his theoretical time Vs production graph and charts.

That doesn't mean that I think I know more than engineers, I might know more than some, but certainly I know far more about proper engineering than any typical bean counter does!

I'm with you...

It is generally frowned upon to have more than one power source

it is needlessly complicated & not as safe!

If the PLC blips from sharing power with the drives, it's a bad design

Dear Uniq Engineers,

You should not use 220 Volt Supply in a 110 Volts system, since the components will get damaged. Either way you should not use undervoltage also.

DHAYANANDHAN.S

Hello all ,

I have been in manufacturing for many years and have run across this very same scenario many times. We have several European and Japanese injection presses that require dual voltage power sources. Case in point , just last week we purchased a JSW 120ELII all electric press. The specs that were faxed to me from the plant we purchased it from only stated that the requirements of the machine were 200V @ 30Kw. So automatically assumed it was a EU power requuirement of 50 Hz , when all I have at my plant is either 480V 3phase or 240V 3 phase. The press did come with the appropriate transformer though.

As it ended up after the press arrived and I removed the covers and READ the prints and manual, that the press required two power sources , (1) @ 480V 3ph no neutral , and also a 208V 3ph with neutral .

Therefore after carefully inspecting machine and prints it was clear why this was done.

The heater bands for the press and a few aux. equipment recepticles mounted on the cover panels require the 480 @ 50A aprox. .

The 208v @ 28.1 KW aprox for the servo motors and computers.

So by bringing only one 480 Vac 125 A service to the tranformer input ( the H ) side of coils. I was able to put double lead lugs ont the input and single on the output 208, I achieved all the requirements of the original design.

If you look into the equipment I believe you will find that there are several smaller transformers in there for specific purposes that each require a different input voltage dependent upon there usage and output designs.

I hope this helps JCD

Define the machine a bit better, seems the reason for the lower voltage feed for the computer and the cooling source may be for a safe guard if the heavy load fed by the higher voltage failed for some reason. The computer's timers and sensors could remain running until the unit was safe and removed from service. You really answered your own question. My suggestion is to read the material supplied by the engieer and find the reason for the two sources of power. "know" and leave "think" aside. The ole adage it's better to be safe than sorry. You could burn a building or ruin a valuable machine..

When you have a machine with the manufacturer's data,first respect and operate the machine with the data specifications.

If on the other hand you don't have 110v ac supply and you cant lay hands on the sizable step-down transformer,if you have to use 220v ac supply,then make sure the panel components for the 110v ac supply conforms with the 220v ac you tend to replace,since you have the computer and coolant pump of 220v ac inputs.

You should try to find out first why the manufacturer has adopted the 110v ac input,why not 220v input.Read the manual and check the panel component ratings if they conform with 220v ac,else change the components to conform with 220v ac input.

In some cases,you find out that the higher the voltage,the higher the speed or performance of the machine,and the lower the current consumption.

It could be that the purpose of the 110v ac input to the coolant pump is to enable the pump performance or speed in such a way as to meet up with proper cooling of the machine,but if 220v ac is applied to a 220v ac coolant pump,it may not cool the machine properly as designed.

Generally speaking, 1 and 3 phase asynchronous and synchronous AC motors' speed is not dependent to voltage. Only the supply frequency and the pole count determines the speed. Therefore "the higher the voltage the higher the speed" rule does not apply to AC motors. It can be applied somehow to DC motors.

Regards

Steve_y

No problem you can go head

Dear All,

First of all I am really thankful to you guys for giving me so much detailed explanation on how the stuff works with the electrics and I didn't knew this as I am a mechanical guy and am learning with the electronics.

Also I respect the designers off-course who have designed this machine as this is really a great concept and achievement in its class for all those looking for small size VMCs. You guys can check out my website www.uniqengineers.com for more details of the TORMACH PCNC1100.

The question of mine was related to this machine only. They have provided two different power supplies, one for running the machine and the other for running its accessories. I really appreciate that stuff now after I have conducted the trial of using both the power supply after reading the electrics of the machine. I used both the inputs of 220V only and it really worked very well without any problem. Then I came to a conclusion of the design that they have done. The secondary power supply that was to be 110V is used just for the auto use of the computer and the coolant pump as they have given the power switch to operate both of this from the machines panel. I mean to tell that if we give the input of 110v then it will send forward the same i.e. 110v and if I use 220v then it will send 220v. Just you need to take care of the accessories that you are attaching are of the respected power supply that are inputted. I hope that you can understand what I am trying to explain.

Once again thank you for your answers and also hope that my lesson can help you guys also in future.