How To Repair A PLASMA CUTTER!

[@findingthetruthfacts2281]

I've been electronics for over 30 years and still in business I'm going to tell you did one heck of a job in presentation, totally awesome!!!!!!! Thank YOU

[@electronicsNmore]

Thanks for the very nice comment! Glad you enjoyed the video. Be sure to check out my very wide range of videos below, and most importantly share my channel with many others. kzbin.infoplaylists

[@vwaudiwelder]

Thanks for the video. Not only did I replace a 5 legged transistor and solder a jumper wire to a burned up Hypertherm Powermax 30 plasma cutter PCB with amazing results but I also replaced a burst capacitor inside a brand new SIMADRE CUT 50 Chinese "plasma cutter" very much like yours sadly with no luck. It does have a dead black digital panel so I will look inside it again to hopefully get it going. It was received DOA by my friend that gave it to me. The Hypertherm was a $100 gamble and with the short cut testing I have conducted thus far it works fine.

[@CB-68-westcreations]

Thanks for covering a majority of the possible issues and test procedures. Even though it turned out to be a resistor and a relay only, It helps to know the other points to check.

[@electronicsNmore]

You're welcome Doug! Be sure to check out my video playlists, rate thumbs up, and share my channel with others.

[@lloydprunier4415]

Really clear and detailed instructions for trouble shooting. Like the fix for the relay, no waste of good parts.

[@Iatolaazzahola]

Excellent!! Very clearly spoken and explained diagnostic video. I was, however, expecting you to show a dissected view of the faulty relay. Very nice work. I like the way you repurpose the relays from other sources. I do that as much as possible, saves $$ outlay on repairs, plus the fact some parts may be obsolete or out of stock that these can work as well or better. Thanks for posting. 😏

[@electronicsNmore]

Glad you enjoyed the video! You're welcome. Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others. Thanks kzbin.infoplaylists

[@jamesdayvault752]

This was one of the best videos I have seen for trouble shooting something I've seen in a long time keep up the good work.

[@electronicsNmore]

Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

[@schmittenhammer]

I have learned a lot from your videos. Very clear and concise! Thanks.

[@anascottwelding1761]

Love your videos! Very well explained and it is really handy how you show how to test the components and also name what they exactly are. thank you so much for these.

[@electronicsNmore]

Glad you enjoy them! I have many helpful and highly interesting videos on my channel, so be sure to look over my extensive video playlists below, and most importantly share my channel with many others. Thanks kzbin.infoplaylists

[@jonryan391]

Great video with plenty of clear explanations. It seems that there are quite a few people out there with dead Lotos equipment

[@danielporter892]

Very clear, concise video. I have the same cutter and this gives me a much clearer understanding of it's operation. Thank you

[@electronicsNmore]

You're welcome! Be sure to rate thumbs up, share my channel with others, and check out my extensive video playlists. Thanks

[@joe-yl6io]

Amazing job sir! We need more like you.

[@johnsherlock6825]

Fantastic explanations and demonstrations mate. Top class video, the dislikes are probably from ppl who do not have a good grip on electronics components and testing procedures... Prefect level of diagnostics for those that do!! Cheers.

[@electronicsNmore]

Glad you enjoyed the video John!

[@sudhirpatil3434]

Nice n precise explanation- It has increased my confidence to repair Plasma cutters....

[@electronicsNmore]

Thanks for watching! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my KZbin channel with others.

[@sudhirpatil3434]

I watch with care n attention- your videos increase my knowledge-

[@stevedovel]

Excellent video! I am so glad you were able to fix it. I hope you get a lot of use out of it.

[@electronicsNmore]

I could not have made this video without you giving me the plasma cutter. Thanks Steve!

[@mot6021]

Great video , good camera work . Everyone should make videos this good .

[@electronicsNmore]

Glad you enjoyed the video Rick! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

[@sinusvag]

Extremely good walk thru of troubleshooting! Kudos and thanks!

[@electronicsNmore]

Glad you enjoyed my video! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel with others. Thanks

[@paulg444]

Friend, you are a gift that keeps giving !!

[@electronicsNmore]

Glad you enjoy the videos Paul! Please be sure to share my channel with many others so I can continue to create helpful and interesting videos well into the future. Thank you!

[@bernardgadbois2066]

Thank you for the great video I have the exact same plasma cutter, you inspired me to take it apart and try to repair it, I removed one of the boards you did and what I found are 6 of the 9 pins on the transformer with broken solders.

[@donaldcampbell7755]

Thank you very much, great video. I just now fixed mine. I had one bad power supply board relay, and both diode bridge rectifiers! I replaced both relays since they came 3 in a pack. Works like a champ now!

[@electronicsNmore]

Great to hear Don! Be sure to look over my extensive videos playlists that cover a wide range of subjects, and most importantly share my channel with many others. Thank you kzbin.infoplaylists

[@anthonylester3247]

What where the signs of your bad relay

[@donaldcampbell7755]

@@anthonylester3247 well, I wasn't getting an arc across the electrodes inside...looking at the relay it had discoloration to its plastic cover. Email me, I'll send some photos I found. Campbell donald at hot mail

[@michor10]

This was such an enjoyable video to watch. I love how meticulously you explain everything. Thumbs up and a subscription from me!

[@LonersGuide]

Great video! Love your detailed, yet concise explanation and narration. Attempting second repair of a 520D plasma/TIG/stick combo machine. First time it failed with a very loud pop when I turned it on. A 1" or so length of thick solder tracing below Relay 1 ( occupied by the exact model of Songle relay that you replaced ) had blown completely off. Replaced the relay (which may have been ok), and it worked again. This last time it broke I was cutting steel which had a lot of holes in it, causing the plasma arc to repeatedly go out and back on. At one point the machine suddenly shut off, and has not come back on since. Not sure what the problem is this time, but my large caps are slightly bulging.

[@electronicsNmore]

Always replace bulging caps.

[@frankmuller5649]

Very nice instructional video... easy to understand and a great source for checking a faulty plasma unit. Thank you for taking the time and sharing your knowledge! Great job and congratulations to you owning a hopefully long living plasma cutter. ;)

[@electronicsNmore]

Thanks Frank! Be sure to share my channel with others, rate thumbs up, and check out my video playlists.

[@martiensbekker]

Plasma cutter does not arc! Hi. Excellent video.., well done! Wish I had your knowledge... and I'm hoping you might see my post and reply! I have Jasic ct312dc Arc, Tig and Plasma... imported from China in 2009 and replaced a capacitor and the on/off switch. In general very happy with the machine, though! I have not used the plasma function for almost a year and my welder stood unused for the whole of last winter in my workshop. This summer I have used the arc weld function without problems. This morning I hooked the cutting torch up and could not get it to arc. After opening up and cleaning with compressed air, I managed to get an arch and do a cut. Glad that I seemed to have solved the problem, I replaced the cover and again no spark! I found the wires in the torch head shorted due to wear. Soldered, insulated and continuance test positive from the trigger button, to the connection point. Spark gap set at 1mm (0.04") and sparking. No visible damage to any parts, fan operates and compressed air flow set at 0.4Mpa. Earth functioning perfectly when tested with stick welding. Water trap in-line and always worked. I adjusted the spark gap from 1.2mm down to .8mm, with 10mm intervals. Still no spark... any ideas ? thanksdt

[@electronicsNmore]

Could be MANY things. Inspect all wiring connections as well as the relays.

[@googleuser6875]

Very comprehensive! I have a Lotos 3 way machine LTPDC2000D that has that same issue of not turning on. I'm thinking the power boards may be similar. The other day I used the plasma cutting function to cut a 1/4" X 4' bar, turned it off and that was the last time I used it. It now won't turn on. I'm hoping the relay issue you've discovered is it. But I do realize the rest of the board needs looking at as well.

[@electronicsNmore]

Hope you figure it out. Thanks for watching!

[@Hagis2k]

Great job! You made the unit look brand new like freshly out of the box :)

[@electronicsNmore]

Yes. I like everything to look nice, including my equipment/tools. :-)

[@Hagis2k]

Funny is that i see that the pcb on the top is the same or almost identical to his "stahlwerk" plasma/tig welder also a china made unit but the fault on his was the dc dc converter where the thick black/red cables are connected on the circuitboard R210 was burnt so it could not start to oscillate but if you gave the gate a touch with 9V thru a 10k resistor then it started up So replaced the resistor and it works now.

[@electronicsNmore]

Hagis2k Not surprising if the boards are very similar. US companies use Chinese companies to make their products. The Chinese then copy the product and sell it for less. LOL. Not good.

[@Hagis2k]

So true then the specs and quality on parts are lower too most often with shitty ChonX capacitors that work a year or so until they are cooked, yeah most products are designed either in us or europe then manufactured in china... And as we all know they do not give a hit about copyrights and so lol same with CE mark.. Oh that must mean Chinese Export :D It is kind of shocking when you buy items on ebay etc sometimes you can recieve really good quality almost for free then like the last powersupply 230V to 12V 1A which i dismantled in pieces as i always do... to find the small cap for the startup almost dagling free and then the optocoupler was almost not soldered in... Quality control? Wont pay for this item for sure.

[@electronicsNmore]

Hagis2k I can say that Chinese product quality is getting better, they're forced to produce better quality items.

[@dianasmith8890]

Excellent video, clear and precise working through the machine in a clear logical manner. Fixed my CUT 50 badged as an LTSUK. The spark gap was too wide! simple intermittent fault which had been with the machine since I bought it. Thank You :-)

[@dianasmith8890]

@@nathanielwyeth3778 No, just wouldn't start.

[@Iatolaazzahola]

@@dianasmith8890 how wide did you set your start up gap? Thanks.

[@raybonz7939]

Excellent troubleshooting and explanations!

[@electronicsNmore]

Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

[@FrancisRodgers]

I very much enjoy your videos. I am learning basic electronics and want to turn an old PC power supply into a bench power supply. There are of course loads of videos doing such things. But it would be great if you should show how to safely test and indeed discharge such power supplies or capacitors (you only mentioned it here) as well as any other potential danger things to look out for in such a project for a noob like me. It is something I worry about a little because I don't yet know enough and I would just like to be safe. BTW. I am asking you because as mentioned, your instructions are very detailed, and you speak very clear and concise. I very much enjoy your videos.

[@electronicsNmore]

Hi. In my (2) popular microwave oven repair videos I explain how to safely discharge capacitors. :-)

[@FrancisRodgers]

Thank you. I will check those videos now. Keep up the great work. I learn a lot from you. :-)

[@peterk75a]

Such an excellent tutorial. Thanks very much, I've learned quite a lot.

[@electronicsNmore]

Great to hear. :-)

[@YoungHeartedSoul]

Excellent video wish I had someone to check my plasma cutter in or around NYC! Willing to take it apart

[@proluxelectronics7419]

Great video, I always make a point of checking the resistance of mosfet to heat sink if thermal transfer insulation pads are used, Had a few faults due to badly aligned insulation pads in production. Big Thumbs Up.

[@electronicsNmore]

Thanks for watching Mike!

[@jamesdepaul3410]

This was very educational thank you.

[@TheJavaSync]

How lucky I'm found your video, I'm repairing plasma cutter unit, thank You

[@electronicsNmore]

You are welcome! Be sure to look over my extensive video playlists below for many other videos of interest to you, and share links to my videos with many others on social networking sites. Thank you kzbin.infoplaylists

[@TheJavaSync]

Dear friend, I watch your video again & again, very enjoyable video, nice & clear expalained, Thank You so much So, it is auxilary psu issue, right? Hope you'll explain about pin8 0v on sg3525 someday, it will be geart. Thx You anw

[@skycarl]

Great grab on this Doug. A little work and you have a fine tool. Really good fix it tips as usual. Carl

[@electronicsNmore]

Thanks Carl!

[@bikefarmtaiwan1800]

This is such a good analysis! Great job

[@JaJa-pu6mw]

Perfect explanation, thank you !

[@MrDIYer]

any tips on how to troubleshoot the pilot arc not working, everything seems to be working fine except for the pilot arc. thank you

[@electronicsNmore]

Try cleaning the contacts and inspecting that board more closely.

[@MrDIYer]

@@electronicsNmore when i checked the voltage output from the pilot arc terminal on the machine when i squeeze the trigger, it puts out a voltage of at least 180 to 200v but there still no pilot arc.

[@codavied]

Did you ever find your problem? I have the same issue

[@nakelove08]

Thank you so much sir for very instructive video,i bought a plasma cutter from tosense from China its look like others brands,it was runing ok till it doesnt start,i am not an electronic trouble shooter but i found these twoo electrodes was not enough tightened and since this video i know now how to adjust it

[@electronicsNmore]

You're welcome! Please share my videos with others. Thanks

[@builtrodewreckedit]

That was a nice repair I have that same model cutter. pretty handy machines hope it stays working well for you

[@electronicsNmore]

It should! :-)

[@Z71Ranger]

Great Video... Thank you for taking the time to teach us... Very Helpful...

[@electronicsNmore]

Thanks for watching! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share.

[@kpontrkndude]

Great video thanks for posting info on these machines. I have the same machine with no air flow. Valve not getting voltage. Everything else working fine. Any suggestions would be helpful. Once again thanks for such a great video.

[@IBFinchie]

So in your best opinion why did these components go out in the first place. Thanks for explaining In such detail. Very good.

[@electronicsNmore]

High currents cause components to fail over time. Nothing lasts forever. Glad you enjoyed my video! Please be sure to look over my extensive video playlists below for other great videos of interest to you. Thanks kzbin.infoplaylists

[@briandeines5019]

what a great video! I have a Hypertherm Powermax 600 and it's acting like my ground cable isn't connected. It arcs but doesn't penetrate. I have not opened it up so the problem might be obvious, but until i do... any ideas and suggestions will be greatly appreciated. New electrode nozzle and drag shield cap from Amazon. also I just subscribed may not mater but it's refreshing to listen to someone who knows what he's talking about instead of blowing smoke.

[@tectalabyss]

Hello Doug. Has always an outstanding How to video. I think I have the same model. it's duty cycle isn't 100% So I let mine cool for a bit between cuttings. If you didn't get a manual with it I will try and make a PDF for you,no charge. All my very best. Bobby

[@electronicsNmore]

Hi Bobby. I think the duty cycle is 60%. I downloaded a pdf manual online. Thanks

[@khndenmark]

You are very clever, I wish I knew what you know, keep up the great work. Regards from Denmark

[@electronicsNmore]

Thank you for the kind remarks! Be sure to check out my extensive video playlists, rate thumbs up, and share my channel with others.

[@andrewh3930]

Absolutely amazing video! Very well done!

[@rics44]

Nice work . Very thorough .

[@electronicsNmore]

Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

[@RB-nv6og]

I agree with everyone here. The video is amazing. You are easy to understand and follow. In my case my machine is completely dead. No lights or noises. From your video, I think my problem is somewhere on the board with the 4 large capacitors. I have checked for power going to that board and it is good. Have you any idea or tests a non pro can do at this point?

[@electronicsNmore]

Power supply board issue, or bad connection.

[@Chadward_]

I have a lotos ct520D which looks very similar on the inside. It does plasma cutting, tig welding, and arc welding. My device powers on and everything appears normal except I cannot get the welder to produce an arc. I have checked the ground and electrode holder for continuity and both are good so that is not the issue. Any idea what would cause such an issue?

[@electronicsNmore]

Check the gap!

[@J-n-J-2016]

I have the same issue did you ever get your lotos ct520d working ..? I tried everything …. Then just found the awesome video for more fix tips.

[@Chadward_]

@@J-n-J-2016 Mine was from amazon and even though it was past the return date they exchanged it for me!

[@J-n-J-2016]

@@Chadward_ That’s where I got mine I’m gonna see if I can return it Thanks for the info

[@Chadward_]

@@J-n-J-2016 For sure! I got on the live chat with someone and explained that it just happened on its own, good luck!

[@Cornpop1234]

I bought this same plasma cutter and would like to use a torch height controller for CNC machine cutting. A torch height controller is a feedback system that locks onto a desired analog voltage level provided by the plasma cutters arc. This voltage is dependent on the material being cut, so the THC has to be set at a certain voltage depending on the thickness of metal. If the gap gets bigger it results in rising resistance due to the increase of arc gap. If the gap gets smaller voltage drops because of less air gap. The z axis uses arc voltage sensing to maintain the proper distance. Metal sheets are not flat enough to just set the height of the torch above the machine and start cutting. I need to hook the torch height controller to the arc voltage of the machine. Is there a voltage divider in the machine or some way to get a arc voltage reading from this machine?

[@JaJa-pu6mw]

I have a question, maybe you could give me some advice. I would be very appreciate . I bought a Longevity Force Cut 40d and found it not working, but after bridging the overheat fuse it started and working. However, when I press the switch in the gun, nothing happens, but this does not mean that it is damaged, because I checked it with a multimeter and the switch works properly. I think something is damaged on the bottom PCB board and the relays are not turning on. I took out the board but I don't know how to check it with a multimeter. Can you help please.

[@FrustratedBaboon]

Wow you know your shit man. You must be an electronic engineer. Good job.

[@electronicsNmore]

:-). I'm not an electronics engineer, just an electronics hobbyist for many years. Thanks for watching!

[@ajibadesamuel4578]

Thanks for the video, it was really insightful.

[@weldphd]

Excellent information - you are terrific presenter!

[@electronicsNmore]

Glad you liked it! Be sure to check out the wide range of videos on my channel for many other videos of interest to you, and most importantly share my YT channel with many others. Thank you! kzbin.infoc/playlists

[@rogertaylor8615]

Nice fix

[@williamzoom]

Great video, there have been literally hundreds of thousands of Chinese plasma cutters & welders sent back to the manufacturer or dealers because of little problems. There is almost always a few on Ebay for parts because they claim the boards are bad but in truth they just have no idea how to test and replace what actually is broken.

[@electronicsNmore]

Glad you enjoyed the video!

[@19811402]

that is the problem these days. just trow it away. i try to fix it first. its broken anyway 😂

[@babispapageorgiou8499]

Hi well done very informative video. Just one question from me. I have a three phase SAF nertazip plasma cutter and when I switch on the machine only the fan works but nothing else. The two contacts that must have a distance between them they are exist in all the machines even they are inverter or transformer?

[@electronicsNmore]

All the plasma cutters I've seen have a discharge electrode gap.

[@babispapageorgiou8499]

electronicsNmore thank you very much for your help.

[@manuelreyes3317]

Thanks friend for your prompt response, which tells me to calibrate the spark and try it, and it did not work

[@nickvee9468]

Thank you for sharing your Knowledge friend. A Cal Electric cut 50 has the same boards. I will need to refer back to this Awesome video when i hook mine up to a cnc table and have to hook up a torch height adjustment into the mix (adjusts height for optimum efficiency by reading torch voltage).

[@electronicsNmore]

Nick Vee Thanks for watching Nick!

[@thebluecollarwelder]

I have a thermal dynamics dynamics pak 4xi that I just bought used only to find it didn't have a pilot arc when I got it home. since I came across this video and you mentioned a relay in there that controls it come to find that was the case with mine cleaned it with sand paper and good to go great video!!!!!!!!

[@electronicsNmore]

Great to hear Josh! Be sure to rate thumbs up, subscribe, check out my extensive video playlists for videos of interest, and share my channel with others. Thanks

[@deanharris7149]

Awesome vid

[@davidsteinfeld9123]

Yeah I have a lotos had many learning curves or so it may seem not to be about me for a change Upon veiwing your video on this machine I can try and give it another change as it has been sitting in silence for many months Not knowing what could be the function that can render it a paper weight you ideas on how to troubleshoot possible problems was what I needed now we hope to do some cutting once the rest of my trouble shooting is complete Thank you

[@electronicsNmore]

David Steinfeld You're welcome Dave.

[@keithjurena9319]

Fantastic job! I have the same brand, different model..runs fine on 240 volt, serious power loss on 208. My mobile generator is a 208 3 phase so could I use a 3 phase full bridge rectifier to feed this unit with DC? That way my generator sees a balanced load over all three phases. This is a 12 kW Lima MAC generator, more than enough kVA for the advertised power factor of 0.93. This generator does fine on my Miller Dynasty which is 3 phase.

[@nocrays3735]

Thanks mate Just picked up a second hand unit similar to yours. The pilot arc was very intermittent. Cleaned and opened the spark gap and is now much better. Not 100% but useable. Pilot arc is not as strong as others Ive seen so may another look possible a sick cap? Will now search for a cct. Cheers

[@electronicsNmore]

Keep playing around with that gap. :-) I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and most importantly share my channel with others. Thank You

[@mar0k7]

My Plasma cutter pulses when it makes the ark with the cutting surface. what would you recommend? Has a good ground and accurate air pressure. Its the same unit in your video. Its a week old. it also doesn't seem to be cutting very good, i can only cut very this stuff. pilot ark seems to be working fine.

[@maliktanzilkaleemel4995]

Hey, great video, however, I get no arc from the two contact behind the resister. Any sugestions or direction to a previous vid. Thanks. althoug mines is not the same model, they seem to be quite simular in design.

[@electronicsNmore]

Try making the gap smaller.

[@dtuck0509]

Very nice video and explanation. Thanks.

[@electronicsNmore]

You are welcome, glad you liked it! Be sure to rate thumbs up, subscribe, and look over my video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thanks! kzbin.infoplaylists

[@jimm2442]

Thank you! I look forward to more of your videos and learning from them.

[@electronicsNmore]

Jim M You're welcome! Be sure to check out my extensive video playlists, rate thumbs up, and share my channel with others. Thanks

[@markflowers1953]

Excellent video!

[@electronicsNmore]

Thank you Mark! Be sure to check out my very wide range of videos and share.

[@robertcoyle1532]

nice job of troubleshooting!

[@electronicsNmore]

Thanks Rob! Be sure to share my channel with many others, and look over my extensive video playlists below for many other videos of interest to you. kzbin.infoplaylists

[@joedirttae9152]

My new Ramsond CUT70DY wont pilot arc...drag tip and it will start. I think maybe gap between points needs set? Thanks for any help.

[@arfrce72]

My cut 50df stopped working as well. I used it once. I have power and air to the front gauges, but no spark or air when I squeeze the trigger any thought? I have cooling fan also.

[@electronicsNmore]

Make sure the trigger switch isn't faulty. Test for continuity when the trigger is squeezed.

[@arfrce72]

I will check that this weekend for sure.

[@johnconnor4594]

Great video with lots of information 👍 Do you have a repair shop I can send my plasma cutter to?

[@davevanhorn9673]

I have a Vevor dual voltage pilot arc cut50 plasma cutter . Powers up ok fan runs and when you pull the trigger the air blows but no spark at torch or contractor ( points thing ) tried spreading them a little . Still nothing.. air shuts off like it should once trigger is released.. Vevor seller was no help at all… any ideas would be greatly appreciated

[@joewest8385]

I found this video very interesting. I enjoyed every moment of it, however not understanding Electronics it really did seem all foreign to me but the thing that stood out the most was his patience I would have hit this thing with a hammer long before I found any signs of discoloring inside. To someone who doesn't understand Electronics regardless of the little that you do know about these things, there sure seems like an awful lot of Gidgets and Gadgets in there for just making something get hot.

[@electronicsNmore]

Glad you enjoyed my video Joe!

[@victoryfirst2878]

What you are hearing is a arc inside the capacitors. That is to the best of my knowledge with what i can hear. Could be wrong or again I could be right.

[@electronicsNmore]

Capacitors don't arc, if they do, they're damaged.

[@victoryfirst2878]

@@electronicsNmore Thanks for letting me know fella.

[@Wa_Chang]

Wow... what a great Chinese plasma cutter trouble shooting video. Thanks

[@electronicsNmore]

Be sure to look over my extensive video playlists for other great videos of interest to you and most importantly share my channel with many others. Thanks!

[@jonathanmoody6951]

I'm hoping to use this video to troubleshoot a little ltec I got at a garage sale for 20 a few years back and never got working

[@electronicsNmore]

Hope the video helps!

[@jonathanmoody6951]

@@electronicsNmore well I just figured out that I don't have sparky in the gap it has, the pieces for the gap were offset, wire leading to it is frayed, and a diode up the line a ways was bent. I'm going to have to watch a few more of your videos and others to diagnose any circuit issues if the wire fray isn't the issue

[@wpowerwagon]

Yep thanks for this info, it was very well put together, and I’ll just stay with what I’m good at, thumbs up

[@electronicsNmore]

You're welcome Steve! Please share. Thanks

[@anthonymorrison2167]

got the cut 50 and have used it 2 times then all of a sudden no air or fire at the gun the unit runs and the digital readout flashes 000 any ideas?

[@zeljkatoplek2165]

Hi, it is possible to use TIG machine for plasma cutting? i have very similar machine for TIG welding, but i do not have installed all diodes. on your machine you have 24 of them, and i have only 16(they did not installed from factory)

[@jafetdefridal2907]

Hi, do you have any idea why the plasma cutter sometimes don't want to start and sometimes just occur small spark but it wont start. Just a spark like in spark plug.

[@electronicsNmore]

Inspect and adjust the spark gap, also try gently cleaning the contact areas of the spark gap using a piece of 2000 grit abrasive paper. Thanks for watching!

[@jafetdefridal2907]

@@electronicsNmore thank you for the reply. I'll check it. Btw what is the correct gap for spark gap? Is it standard for any machine?

[@joedirttae9152]

Very good job explaining stuff.....hold tip straight up and down or slightly leaning back and push the arc. Dragging arc backwards is not effective for clean cut.

[@electronicsNmore]

When I use it in the future, I'll do that. Thanks for watching!

[@paskracing77]

So I have the same board similar problem, unit powers on if I hold trigger on you can see arc its working but say within 5 seconds of working you can hear fan slowing down then while unit shuts off, will not turn back on for atleast 5 minutes if I turn it on within 30 seconds led display lights for a second then fades out no fan unless you wait a few minutes If I leave switch on the only thing i notice is ptc gets warm but no fan and nothings powered up Relay problem?

[@electronicsNmore]

You can try tapping the relays when the problem occurs, of course it could be very dangerous because the unit needs to be powered up. You can do it at your own risk. I'd use a long plastic kitchen utensil.

[@dystopiandream7134]

I know this is a very old video, but information on these machines are pretty minimal. I have a ltpdc2000d that energizes fan and I can see spark at the spark gap when trigger pulled but get no torch. Air solenoid energizes but no spark even on contact with piece. With low to no air pressure I get slight spark from the nozzle. I have continuity from pilot arc to nozzle and continuity from gas connection to electrode from torch. I get varying dc voltage from pilot arc to hose connection. I'm not sure what to expect and the manual isn't much help. Any help you could provide would be very much appreciated!

[@electronicsNmore]

I reply to most comments on videos, regardless of age. So many things can be at fault. Try adjusting the gap.

[@MS940]

Hello, Thanks for useful repair video! I have plasma cutter kind of like this, brand Trexus Welbach with pilot arc. Also quit working, no arc anymore. Sparking relay is pulling but makes no arc between gap. Fan/air work ok. I checked diodes and transistors for shorting. Indicator light in the front panel is flashing when push the torch switch. Before my unit died, arc was cut out many times during use. Any ideas where to look for?

[@electronicsNmore]

Do you have a spark gap?

[@MS940]

Yes, about 0.7mm. Relay looks different comparing to your unit. It looks like this. www.tme.eu/en/details/g2r-1-230ac/miniature-electromagnetic-relays/omron/g2r-1-230vac/

[@andreiruiz1438]

sir i have 200a dc inverter welder and iwant to get ac output can i directly wired up the two ac output leg of the main toroid transformer???

[@chrisrenaud4141]

I'm having some issues with the pilot arc on my plasma it sputters a bit, sparks sometimes will start an arc when the metal is clean without touching most of the time, I checked the gap between the contacts and the arc jumps across I gapped them out a bit and it made no difference in the pilot arc. Any ideas? Thanks a lot.

[@coronaismael9024]

Is there drag shielded tips for this plasma cutter?

[@electronicsNmore]

I don't think so. They use the steel wire at the tip as a spacer.

[@supercleaner]

I watched your video looking for an answer to why I'm getting intermittent cutting, or interrupted cutting at both 120 and 240 volts. Is it possible for the contacts to be dirty or incorrectly set on a new machine? This is one of the Chinese-made "Cut 50" machines. Thanks for showing us how to recognize faulty components and check them.

[@electronicsNmore]

Ben Bennett Definitely check the contacts.

[@supercleaner]

Actually, it was my not knowing how to position the tool. Anyway, I realized I had 19 volts on the display when I turned the unit on. I turned out to be the fan voltage. The fan was frozen until I worked it free. Then when the fan turned off the voltage went to zero. The funny thing is the unit will cut metal with the dial at minimum setting while displaying 19 volts. Anyway, after unsuccessfully trying to convince me that intermittent cutting was normal for these machines, they rendered a $100 refund to me for repair it. I put a clothes dryer cord on it to make sure it gets good power. Like I told the seller, this will work for a hobbyist. Wish me luck. Thanks again for a great video.

[@mastermoarman]

Cool video. I'm looking at getting one of these for a small cnc plasma table. I want to use a proma thc that requires ark ref voltage. Where would I hook it up on that machine?

[@rev007ful]

hi m8 got a ct312 was on the plasma cutting and it went bang you have any idea what is up with it

[@electronicsNmore]

Sounds like you blew a mosfet.

[@luckydubeinrc5165]

i can recoomend this video!!! excellent fix

[@anthonylester3247]

Hey man I have the brown machine like this and when I turn it on it tries to power up but just keeps going on and off over and over like it not getting enough power can you give me a tip or pointer

[@agusastina7942]

Did you can make handle plasma cutter with the simple coumponen . I want to make but l can not do tha's can you help me.

[@electronicsNmore]

Which handle? The one on top of the machine?

[@timceltic6439]

Hi very good video. Just like to ask you do you test boards separately from welders .

[@MotoWanderer]

Excellent as always. Thanks for sharing.

[@electronicsNmore]

Glad you enjoyed the video!

[@davidmurdoch530]

i have just got a icut 60 pilot from ebay , it cuts with or with out the ground connected to the work piece , i do not want to damage the machine , i wonder what your thoughts are , :)

[@electronicsNmore]

I'm not familiar with that.

[@WesB1972]

Bravo, great job!!!

[@electronicsNmore]

Thank you! I have many great videos on my channel that cover a wide range of subjects, so be sure to look over my video playlists and most importantly share with others. Thank you

[@doorguner01]

i opened up my LTP5000D and i found corrosion on the power supply board on the pins and board its on PTC 16p termistor , mpp 475j250v metallized polypropylene film capacitors like the one on the top circuit board is there any way to cross reference those components i want to replace them before using it again i used the unit once last year when i had problems with the torch so i replaced the whole torch handle with a S-45 triffmet torch handle

[@electronicsNmore]

You can find those on Ebay. Just match the values.

[@doorguner01]

electronicsNmore ive found the thermistor now i have to find the other

[@doorguner01]

electronicsNmore so how do i find the value of the metallized polypropylene film capacitor theres no value number on it

[@electronicsNmore]

terry jenkins Use a DMM that can measure capacitance, like the one shown on my channel.

[@doorguner01]

electronicsNmore my innova 10 megohms wont work what brand and were did you buy your meter from