Too much Mac n cheese bro , and u start talking that space talk , remember people are learning Here .weres your junk and that camera is swinging to fast ,we're you goin to the crap room ,
ya good idea asshole. just leave a few things out ya no biggy, little johnny just fried mom pop sister and the fucking neiborhood!. if your going to post something at least have your head outa your ass.
call 4086424864 or visit uwelding dot come to buy one powerful plasma cutter. we have much more powerful 50A plasma cutter check the video on uwelding dot com.
special offer for 369 dollars shipped for any customer from this lead
Like i said about your other vid ....i would build one with very clear instructions but probably only if you were standing there to tell me if i am about to kill myself doing something wrong....i must say your understanding of how this works seems to be pretty thorough..keep the vids coming.
Could you make a playlist of your videos in order of relevance to understand exactly what and how you are trying to explain this topic. Would be most appreciated.
@JOOODYJOOODY The current is limited and the voltage too high, probably you could weld thin stuff that needs 20-30A of current but I'm not sure of the results (probably lots of sputtering, at least) and consuming much more power than required (20A at 240V are around 5kW )
By code and law plasma cutters are required to have their output isolated from mains power. This means that there is a isolation transformer in between the mains and the input rectifier.
If you were to come in between ground (Lets say kneeling on wet pavement) and the tip it would kill you in a split second. There are NO safeties in this machine.
ok you dork, if you want an isolation transformer on the input then add one to yours. Like the boy says, "If you don't understand the concepts presented here, this project is not for you". As for me, I am not going to put my tongue on the tip of the gun and pull the trigger.
Wow, maybe this plasma cutter should be renamed the "Darwin Plasma Cutter". As building it will increase the general intelligence quotient of the population by the users removing themselves from the gene pool.
Its the same method used my some large automated industrial cnc setups. Its not for the normal consumer. Even so, there is no measurable voltage from the work to ground, but can still post a life risk if you hold a ground in one hand and hold the work or dig in the tip with the trigger pulled, lol.
I would not suggest building a project like this if you do not know how to safely handle electricity.
In the video you said to have a HV capacitor across the + and - of the diode bridge to filter out high volt spikes, how important is this, does it really work?
it wasn't in the schmatic video, and I fried a diode pack,
No, that wont work. There is still grounding on three phase. A corner grounded delta has one of the lines tied directly to ground. One 120/208 delta the center of coil of the transformer is tied to ground as well.
As the line is not isolated it will have a voltage potential from the torch to earth ground no matter if you use a half wave rectifier or a full wave rectifier. And then what do you plan on using for a work ground? Using a half bridge on delta's three lines leaves you will only earth ground as a return path and to use that would violate NEC.
There is no isolation in any case even if you use transformer you are grounding one wire by connecting it to your workpiece so if you touch your plasma head you may get electric shock anyway.
this is why isolation transformer is not required. It just does not do anything.
Of course this will not pass NEC but it is relatively safe, comparing to full bridge setup which is plain death trap.
A half bridge is no safer than a full bridge and you still have not shown a return path for the current from the half bridge.
An isolation transformer provides considerable protection. Not only to yourself or hapless bystanders but to other equipment and building wiring. With an isolated setup you have one return path, through the work cable. With an unisolated setup you have a return through anything, tables, power tools, even the ground you are standing on.
No safer? if you use full bridge and connect one wire to your fence or car which you want to weld you may be killed before you will even start you work. any accidental grab to your workpiece will be your last.
half bridge is only harmful if you fail to connect ground to your workpiece and then touch it with other electrode in that case you will get some shock, but it wont kill you since it is short ,also 110v i relatively harmless if you do not stand in the water.
Well, I guess it is safer since it will not work. What do you connect your ground too? If you had a neutral wire with your three phase you could use that but if you are on delta you wont have one and even when you do have Wye often the neutral is not dropped to an outlet. Unless a machine needs 120v internally the neutral is left out.
110v is anything but harmless. Its the current that kills you, not the voltage. Higher voltage just makes it easier to get through the dry epidermis.
There are, in general, only two instances here where you have a neutral wire. That is with 120/208 Wye and 277/480 Wye. And the only time I have seen an outlet that has all 5 wires (3 hots, 1 neutral, 1 ground) is when a machine or piece of equipments specifically needs 120v like some power supplies. But usually the machine designers build a machine to run with only the three hots and use an internal transformer is 120v is needed. This makes machines more compatible for installation.
Not bad and i agree that you give plenty of information on the subject. More than is required as far as i am concerned. The concept is all that is required and with that well done
Im sorry to saiy that you poorly explain that. The directions were confusing. I would highly sugest a longer more descriptive video. that would would make you vido much beter. beacuse what i hear for that video makes absolutely no sense. and i would not sugest that video to anyone. (no offence)
You need to watch all the videos and read the info on each video to get to whole picture. Draw it out on paper as the connection points are discussed and if you can connect one component to the next component as this video shows then I would suggest you not ever try to build such a dangerous device!
The inductors are 12mH and the value is not so critical unless you do a series resonate circuit. They serve as part of the filter circuit to made the DC more pure. The more ac wave you have in the output the less smooth the cut will be, unless that ac is very high frequency.
@cheaphardwarez 12mH each? With that much you could limit the current on AC side instead of wasting power in the resistor...isn't 38mH the AC equivalent of 12 Ohm at 60Hz? The resistor is cheaper but not in the long run, plus you don't have a water bucket with live wires in it around the shop
It is power that generates heat. Faster air through a spark = higher temp. You just have to be able to keep the spark going. You will find that things like spark coils from a car can not arc in that much flowing air. You need lots of current and very high voltage to start the arc.
There is a reason that plasma cutters do not step the voltage down. I would think you would need about 4 or more MOTs(at 1200watts) to get the power rating up. As long as you can keep the cutting voltage above 90 at the current level you need then you are fine.
i dont know if my design will work so i hope you dont mind if i run over it with you,
im using a mot transformer to step down the voltage and step up the amperage then i rectifiy this lower voltage and run it past a bypass cap 0.1uf 2000v then a dimmer cap 360uf 400v and lastly a 10 ohm resistor "
not water type" basically the concept is high amperage dc low voltage
The small HV cap I used was to bypass the high voltage(90KV) from the starter keeping it off the diodes which are rated at a much lower voltage.I have heard that you can use MOTs in parallel to make a high voltage plasma cutter. I do not know though. I would rather not have 10KW of high voltage anywhere near me! Good luck! If you do manage to make something that works let me know.
Bla bla bla diode bla bla ,common bro ?
Alientraveler003 1 month ago
Too much Mac n cheese bro , and u start talking that space talk , remember people are learning Here .weres your junk and that camera is swinging to fast ,we're you goin to the crap room ,
Alientraveler003 1 month ago
ya good idea asshole. just leave a few things out ya no biggy, little johnny just fried mom pop sister and the fucking neiborhood!. if your going to post something at least have your head outa your ass.
Downrite100 1 month ago
This has been flagged as spam show
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mike20111111 1 year ago
This has been flagged as spam show
Lotos CT520D: 50A Plasma Cutter /200 A Tig/ 200 A Stick Welder Combo
more information from uwelding.com
If you like it, add this magic code : mike-youtube you will get 8% discount
special price: $644!!!!!!!!!!
contact us
Tel: (408)642-4864
Email: mike@uwelding.com
mike20111111 1 year ago
This has been flagged as spam show
call 4086424864 or visit uwelding dot come to buy one powerful plasma cutter. we have much more powerful 50A plasma cutter check the video on uwelding dot com.
special offer for 369 dollars shipped for any customer from this lead
lotosteck 1 year ago
how about just a schematic...
tannersword1 1 year ago
Like i said about your other vid ....i would build one with very clear instructions but probably only if you were standing there to tell me if i am about to kill myself doing something wrong....i must say your understanding of how this works seems to be pretty thorough..keep the vids coming.
zx12ryder 1 year ago
thanks for the video! I have just finished my build it works fine! Many thanks!
slowman1996 1 year ago
Could you make a playlist of your videos in order of relevance to understand exactly what and how you are trying to explain this topic. Would be most appreciated.
trahcceb 1 year ago
what is keeping from welding with this?
JOOODYJOOODY 1 year ago
@JOOODYJOOODY The current is limited and the voltage too high, probably you could weld thin stuff that needs 20-30A of current but I'm not sure of the results (probably lots of sputtering, at least) and consuming much more power than required (20A at 240V are around 5kW )
marcheseDS 1 year ago
Do you know what the voltage over the actual plasma is?
I would very much like to know this.
alliam84 2 years ago
This has been flagged as spam show
go to plasmametalcutter dot c o m
GiantTech 2 years ago
Comment removed
GiantTech 2 years ago
Nice work there.
acidlord258 2 years ago
SupermaxCNC .....Abovegroundminer is a little slow..gay but a little slow .
maddogtannen1966 2 years ago
SupermaxCNC... Thanks for convincing me to build one of these machines!
Perhaps we all could build this with a breaker, a isolation transformer's, Caps,SCR's? (my secret), a reactor and minimal electronic's?
Maybe Study capacitive reactance and stuff.
I like this man's video!
Most people sell plans like this on ebay..
He give's his plan's for free..
Abovegroundminer 2 years ago
you have awesome water resistor there ! :D
klucis707 2 years ago
DO NOT BUILD THIS! IT IS A DEATH TRAP!
By code and law plasma cutters are required to have their output isolated from mains power. This means that there is a isolation transformer in between the mains and the input rectifier.
If you were to come in between ground (Lets say kneeling on wet pavement) and the tip it would kill you in a split second. There are NO safeties in this machine.
SupermaxCNC 3 years ago
Go home to cry! Cheaphardwarez have done a great gagdet so shut up! And if you can read, it already reads on his info!
Tonitzi91 3 years ago
ok you dork, if you want an isolation transformer on the input then add one to yours. Like the boy says, "If you don't understand the concepts presented here, this project is not for you". As for me, I am not going to put my tongue on the tip of the gun and pull the trigger.
dancy66510 3 years ago 3
Wow, maybe this plasma cutter should be renamed the "Darwin Plasma Cutter". As building it will increase the general intelligence quotient of the population by the users removing themselves from the gene pool.
SupermaxCNC 3 years ago
Its the same method used my some large automated industrial cnc setups. Its not for the normal consumer. Even so, there is no measurable voltage from the work to ground, but can still post a life risk if you hold a ground in one hand and hold the work or dig in the tip with the trigger pulled, lol.
I would not suggest building a project like this if you do not know how to safely handle electricity.
cheaphardwarez 3 years ago
I am a service tech for industrial plasma cutting machines and welding equipment. There are no industrial machines built this way.
Hypertherm makes a better machine than miller.
SupermaxCNC 3 years ago
How much for a working model?
Brewerwaterman 2 years ago
@cheaphardwarez
In the video you said to have a HV capacitor across the + and - of the diode bridge to filter out high volt spikes, how important is this, does it really work?
it wasn't in the schmatic video, and I fried a diode pack,
marieomagpie 1 year ago
Comment removed
marcheseDS 1 year ago
@cheaphardwarez
I am a service tech for those large cnc machines and I have worked on Esab and Hypertherm units up to 400 amps. All of them use transformers.
SupermaxCNC 1 year ago
So go to miller and buy your self a cutter.
cheaphardwarez 3 years ago 4
@SupermaxCNC
It could be made safe if powered with Half-wave rectifier connectred to 3 phase power grid.
in that case all you need is to maintain correct phase and ground connections.
deltaxcd 1 year ago
@deltaxcd
No, that wont work. There is still grounding on three phase. A corner grounded delta has one of the lines tied directly to ground. One 120/208 delta the center of coil of the transformer is tied to ground as well.
SupermaxCNC 1 year ago
@SupermaxCNC
You do not understand me.
To be safe you need to use HALF WAVE rectifier.
You connect ground wire to your workpiece.
and use 3 diodes (one from each phase ), not 6 diodes in full bridge comfiguration, to power plasma cutter head.
deltaxcd 1 year ago
@deltaxcd
As the line is not isolated it will have a voltage potential from the torch to earth ground no matter if you use a half wave rectifier or a full wave rectifier. And then what do you plan on using for a work ground? Using a half bridge on delta's three lines leaves you will only earth ground as a return path and to use that would violate NEC.
SupermaxCNC 1 year ago
@SupermaxCNC
There is no isolation in any case even if you use transformer you are grounding one wire by connecting it to your workpiece so if you touch your plasma head you may get electric shock anyway.
this is why isolation transformer is not required. It just does not do anything.
Of course this will not pass NEC but it is relatively safe, comparing to full bridge setup which is plain death trap.
deltaxcd 1 year ago
@deltaxcd
A half bridge is no safer than a full bridge and you still have not shown a return path for the current from the half bridge.
An isolation transformer provides considerable protection. Not only to yourself or hapless bystanders but to other equipment and building wiring. With an isolated setup you have one return path, through the work cable. With an unisolated setup you have a return through anything, tables, power tools, even the ground you are standing on.
SupermaxCNC 1 year ago
@SupermaxCNC
No safer? if you use full bridge and connect one wire to your fence or car which you want to weld you may be killed before you will even start you work. any accidental grab to your workpiece will be your last.
half bridge is only harmful if you fail to connect ground to your workpiece and then touch it with other electrode in that case you will get some shock, but it wont kill you since it is short ,also 110v i relatively harmless if you do not stand in the water.
deltaxcd 1 year ago
@deltaxcd
Well, I guess it is safer since it will not work. What do you connect your ground too? If you had a neutral wire with your three phase you could use that but if you are on delta you wont have one and even when you do have Wye often the neutral is not dropped to an outlet. Unless a machine needs 120v internally the neutral is left out.
110v is anything but harmless. Its the current that kills you, not the voltage. Higher voltage just makes it easier to get through the dry epidermis.
SupermaxCNC 1 year ago
@SupermaxCNC
You do not have neutral wire? I have never seen such case, since where I live we always have neutral wire.
deltaxcd 1 year ago
@deltaxcd
There are, in general, only two instances here where you have a neutral wire. That is with 120/208 Wye and 277/480 Wye. And the only time I have seen an outlet that has all 5 wires (3 hots, 1 neutral, 1 ground) is when a machine or piece of equipments specifically needs 120v like some power supplies. But usually the machine designers build a machine to run with only the three hots and use an internal transformer is 120v is needed. This makes machines more compatible for installation.
SupermaxCNC 1 year ago
@SupermaxCNC
It could be made safe if powered with Half-wave rectifier connected to 3 phase power grid.
in that case all you need is to maintain correct phase and ground connections.
deltaxcd 1 year ago
Not bad and i agree that you give plenty of information on the subject. More than is required as far as i am concerned. The concept is all that is required and with that well done
434F503E31 3 years ago
Im sorry to saiy that you poorly explain that. The directions were confusing. I would highly sugest a longer more descriptive video. that would would make you vido much beter. beacuse what i hear for that video makes absolutely no sense. and i would not sugest that video to anyone. (no offence)
omaga99 3 years ago
You need to watch all the videos and read the info on each video to get to whole picture. Draw it out on paper as the connection points are discussed and if you can connect one component to the next component as this video shows then I would suggest you not ever try to build such a dangerous device!
cheaphardwarez 3 years ago
Everything you need IS here on youtube. Really!
cheaphardwarez 3 years ago
what if i addignition wil it give bigger spark?
dreamyear 3 years ago
ignition? For starting or what?
cheaphardwarez 3 years ago
And other question yet, what materials are the electrode and the plasma channel?
Tonitzi91 3 years ago
Tungsten electrode copper tip. A home made torch tip is the same using a modified tig welder using tungsten electrode and machined copper drag tip.
cheaphardwarez 3 years ago
Very cool! I am going to build this but I`d like to know what for are the inductors?Thanks!
Tonitzi91 3 years ago
The inductors are 12mH and the value is not so critical unless you do a series resonate circuit. They serve as part of the filter circuit to made the DC more pure. The more ac wave you have in the output the less smooth the cut will be, unless that ac is very high frequency.
cheaphardwarez 3 years ago
@cheaphardwarez 12mH each? With that much you could limit the current on AC side instead of wasting power in the resistor...isn't 38mH the AC equivalent of 12 Ohm at 60Hz? The resistor is cheaper but not in the long run, plus you don't have a water bucket with live wires in it around the shop
marcheseDS 1 year ago
It is power that generates heat. Faster air through a spark = higher temp. You just have to be able to keep the spark going. You will find that things like spark coils from a car can not arc in that much flowing air. You need lots of current and very high voltage to start the arc.
cheaphardwarez 4 years ago
There is a reason that plasma cutters do not step the voltage down. I would think you would need about 4 or more MOTs(at 1200watts) to get the power rating up. As long as you can keep the cutting voltage above 90 at the current level you need then you are fine.
cheaphardwarez 4 years ago
hi me again
i dont know if my design will work so i hope you dont mind if i run over it with you,
im using a mot transformer to step down the voltage and step up the amperage then i rectifiy this lower voltage and run it past a bypass cap 0.1uf 2000v then a dimmer cap 360uf 400v and lastly a 10 ohm resistor "
not water type" basically the concept is high amperage dc low voltage
98209276 4 years ago
The small HV cap I used was to bypass the high voltage(90KV) from the starter keeping it off the diodes which are rated at a much lower voltage.I have heard that you can use MOTs in parallel to make a high voltage plasma cutter. I do not know though. I would rather not have 10KW of high voltage anywhere near me! Good luck! If you do manage to make something that works let me know.
cheaphardwarez 4 years ago