Mig Welding set up part 3. Why wire speed controls the amps? Gas flow meter Tips and Tricks #47
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- Опубликовано: 4 окт 2024
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thank you i learned today 53 yrs young
Your flow meter info is very interesting. I'm good at conserving but I didn't know this. I will try this soon. If people listen you have saved the world some gas. Thank you very much. I've welded for 40 yrs and I try to keep the flow as low as will get the job done but looks like I could have done better.
I didn’t really appreciate using a flow meter until quite recently myself, after 30+ years… 👍
blessings i am from Barbados i do enjoy your videos you have lots of knowledge i do learn a lot from you when i watch the videos
A 0,6 mm wire is just 56% of a 0,8 mm wire, so the difference is quite substantial. Thank you, Trev, for great videos on how to set up a mig welder!
So true subtle differences when welding can yield such varying results 56% is so different from what you’d assume. Cheers Trev 👍
35:55 you nail it, explaining WHY wire feed speed affects amperage.
Hey Trev! You saved me some money on Argon. I took your advice along with some additional information on a welding blog regarding flow meter and regulator set up. In addition to your advice for adding a flow meter and running it wide open with my regulator at the tank controlling flow, I modified my flow meter fittings to attach it directly to the back of the welder's intake port. I also swapped out my long somewhat flexible hose with a short piece of much stiffer walled gas supply hose. This prevents excess gas pressure building up in the hose and drastically minimized the sudden surge of Argon with each trigger pull. Thanks mate!
there ain't no way to learn welding without melting metal. i love your outlook and lessons
I had an uncle like you. He also had a kind and loving way of showing you that you really didn’t know nearly as much as you thought you did. Very humbling. Even though I do this for a living, and I would love the opportunity to spend an afternoon with you as I think it would be very informative and entertaining, I think that if you showed up at my shop, I would lock the door and pretend that I lost the key. If we went in, I would only embarrass myself. Thanks again for the great videos.
Marcus Loftis Thanks for your comments my friend, cheers Trev 👍
Only taken me 60 odd years to complete my basic education (I'm 66) so thanks Trev - you could always make a living going into schools to teach really useful stuff to improve life skills and knowledge !
The school's could so do with more guys like Trev, going in and making understanding things easier than teachers do. You really need some hands on experience to be able to teach some things in a way others understand.
Oh by the way Trev, I just bought myself my first MIG welder, it's a R-Tech 180, like yours, so far I'm very happy with it's ease of use for a beginner MIG welder, I have done TIG welding before though, so I'm pretty sure that helped. Totally agree with your review on it, and it helped me no end with getting the setting more correct, so thanks for that vid ;)
Great instruction about a very hard to explain topic. Taking time to explain in detail provides credibility to your skills and experience. I couldn’t help but think you were sounding like your description of your dad with attention to detail!!
Very well explained Mr Trev
Frillient Trev... I will rewatch this when sober. Love ya.
Trev I have watched each of these videos and must say that they have given me a much better understanding of the mig process. I will be watching the series again so that the information sinks in.
Just wanted to say thanks, as a self learned welder, stainless tig at work and mig at home restoring cars (mainly triumph spitfires) . Especially slowing wire speed down and turning the gas down has helped
Thanks fella about the flow meter and regular set up.
I set mine up the wrong way as you first described getting a burst of gas.
Now I've set my regular and flow meter as you have.
And also wire tension.
Top tips helping us newbies out.
Stay safe.
👍
I'll be damned... all this time I've been struggling with that first arc strike and now I know why! That initial purge of gas has been the culprit this entire time! Thank you thank you thank you!
As my old welding instructor used to say.. "Welding isn't rocket science! Oh.. Wait.. It is!!" It's funny how many people don't understand that welding isn't just "gluing" metal together. there is actually fusion happening in the weld puddle and mixing and re-arranging of molecules within the weld material and the filler being added to get fusion. I am glad you took some time to break down for those that don't quite understand how it works. For those of us whom studied welding know there is a lot more to it and also the metallurgy behind it. Thanks for this video Trev! Hope you are doing well! Cheers!
Paulie thanks Paulie and we’re all doing great thank you, hope you’re too. Cheers Trev 👍
Wow Trev, you have excelled today. Bucket loads of information in a very understandable format, I am sure that viewers will have a better understanding from this which will help them be better welders. Play with the settings on some scrap and find out what your own welder is capable of and don’t be scared to mess up. You only have to get up one more time than falling down to be successful! Thank you.
Love the use of potential when talking about voltage and electric fence. Great current and voltage descriptions.
Brilliant vid Trev I am going to try to set up my new Bottle and regulator using these ideas so cheers for that. My Dad always farted at the dinner table, you didn't miss out trust me lol
Trev you truly have a gift for teaching. Can’t wait to use what you have shared. I have been using way too much gas and really been cranking down on the wire guide. I will get those sorted first. Thank you.
Blimey, every-time I watch your vids I take away so many new tips...Thanks so much for sharing your incredible knowledge. I bought an R-Tech 180 on your recommendation...it is an amazing piece of kit. Cheers Trev.
perfectly explained. I thought I already knew everything but still learned something
As always, very interesting, that was for me a master class 👍👍
I just bought a flow-meter from R-tech, great value. I should've re-watched this video before I started using it though, as I just went through a 10L bottle of argon in 2 days 🤣 Oh well, off for a refill tomorrow...
Really enjoyed this one, story about your father was really funny, well done
Thanks Trev, very useful. Great that someone with so much knowledge can still relate back to us beginners. I've suffered a lot of the problems you've discussed, good to know I'm not the only one and thanks for explaining different options and solutions.
Great tip about the wire feed tension adjustment to allow for slip as required - now I get it!
Great vid Trev again alot of informacion regarding welding will help a lot of people who have difficulty on setup rather than welding if your setup is right your welding will be better. Great
explains the difference between 0.6 and 0.8 and im going to try 0.6mm with my rtech! thank you :D
Im only doing car body work atm
Thanks Trev for the air explanation
best explanations ever made simple..
You would have made a great school teacher !
Great video Trev. Nice touch with the flow meter. Another well explained and detailed explanation for us novices lol.
Cheers, Jeff.
cabdriveruk cheers Jeff 👍
Clear and concise as always. Love the examples and explanations.
Great explanation. I appreciate the lesson Trev.
Thanks for explaining things in a way that makes sense and I can understand. Now I have to go and buy one of your hammers.
Brilliantly explained, thanks.
Until recently I had a SIP 130T MIG Welder which died. I bought the RTECH 180 Same as yours and instantly got the problems you were facing with 0.6 wire. Glad to know its not me. Might have to change to 0.8 wire.
Hi Trevor, I was training two guys at Bicester Heritage two weeks ago and they were full of praise for yourself and I’ve got to say your doing a good job too, I just wanted to add a bit in regards to gas flow, I found using a pea shooter at the top of the shroud to be the best gas flow reading because it’s at the point of contact to the weld, we had a machine at CNWL which lost 7 LPM inside the machine for some reason, they are on eBay for about £5 (Argon Co2 Gas Flow Meter Peashooter).
I’ve been teaching body repair for a while now and your always learning I find. Also carbon shrinking with the mig is also another handy trick to show the DIY guys, I show my guys on every course and I should put a another video together really, I used to get the students to record lessons for the guys that missed them but due to data protection I took lots down as students where in them. Keep up what your doing as it all helps to keep the skills alive!
Hi Andy thanks for your comments and great advice. I’ve only just spotted your email you sent me a short while ago, sorry about the late reply. Maybe when this craziness calms down I could pop over and see you at the centre. All the very best Trev 👍
@@trevsblog I’ve got in as I teach a classic car group every Tuesday at Bicester Heritage. All my apprentice training has switched to online delivery from next week but your welcome to pop in on a Tuesday (probably better to come earlier but I’m teaching from 6-9pm in unit 103 at Bicester Heritage, I hope your still making a living with your van? Maybe I can talk you into some part time teaching at Bicester? I’m not sure if your aware of Heritage Skills Academy or the new standards (these New Standards are the New replacements of the NVQ programs) the Heritage Standard is based on the older skills to keep them alive and your skills are very much in demand. We are also setting up a centre at Brooklands Museum for January 2021. Keep up what your doing as I’m hope this also starts to return a good income for you, I do tell the students to look at your blogs as it all helps.
Regards Andy
I’ve had the problem with a large surge in gas and now I’ve seen how to sort it many thanks trev 👍👍👍
Remember the old phrase "its the volts that jolts ad the mills that kills" 😉
Sweet idea. Makes such a huge improvement. Thanks.
Another fine Video Trev.. Good to see you. My very best to you and the family..
I have the R-Tech MIG 180 & their TIG 200 machines, excellent UK kit.
Wow ! A very difficult subject well explained and demonstrated. I'm looking forwards to your shop opening. Best of luck with that. Trev's Blog stickers will be amongst my first order. Keep safe. M
Malcolm Till Thanks Malcolm 👍
Thanks, learned a lot there.
Love your videos trev. I too love fabrication and welding and although its not my trade, ive built some stunning cars and to nice standards. Your work is motivational and inspirational to me because your workmanship is the best and i always aspire to get better with everything i do. Learning to tig weld, as ive always used mig and found your tig series videos very helpful. P.s love the slideshow of photos at the end of your videos. I watch them through fully every time.
Performance Classics hey thanks and although its flattering to hear I’m definitely not the best by a long stretch but what I know I’m willing to share with as much enthusiasm as possible. Stay tuned my friend more stuff to come. Cheers Trev 👍
Brilliant trick with the flow meter, Trev. Mine arrives today. The flat tube in the gauge is a Bourdon tube. Named after the inventor I believe.
Alanmony Thanks I didn’t know that, another piece of information I learned today 👍
@@trevsblog A bourdon tube can only measure pressure, not flow. Whoever is marketing that is very wrong...IMHO
@@rl3898 I don't think what the gauge is reading effects the flow meter at all. Trev is only using the regulator to control that flow instead of the valve on the flow meter.
Another great video Trev👊
I've sent you a message in messenger mate
Good video young man!
Brilliant Thanks Trev.
Good video thanks Trev👍
Excellent cheers Trev !
Jesus Hanna you and Fitzee are my faves
Cracking video trev, bought the books you recommended, excellent reads.
Another great video. Well done Trev! Suggestion for future topic: beginners guide to aluminium welding. Have personal interest as I’ve got a Healey 3000 project and the front and rear aluminium shrouds need lots of repairs 👍
Thanks, I am trying to learn to weld thin metal for body work and I keep blowing holes because I am holding the gun too close to the work piece. Thank you!
Another great video Trev :)
Sean Alexander thank you my friend. Cheers Trev 👍
And I just (finally) bought myself a flow meter - your trick using the regulator to control flow works a treat! Thanks for another great tip :)
Thanks for explaining stick out welding thin metals, I seen this happening was not sure, allsow settings for flow metering.
Great video. I think light bulbs might actually have argon in them rather than a vacuum. Probably easier to make that way and can use thinner glass. Voltage basically sets arc length. You want the MIG to keep that constant whatever you set the wire speed to so that's why they're constant voltage. With TIG (constant current) if you hold the tungsten further away the machine will increase the voltage. You don't want to do that but if you do it a bit by mistake it means the arc stays lit. If you are feeding more rod (manually since it's TIG) you will need a bit more current to melt the extra metal and you usually do that with the pedal. On thin stuff it often works well to actually press the pedal a bit more as you dip into the puddle.
Love you Trev and the videos but this made me fall asleep with dribble down my chin 🤤
I was taught the electrical way to work things out ,was I = V x R ohms law ,do you ever use compressed air to cool your welding ,or a copper bar behind ,when accessible of course ,good video once again Trev ,stay safe bud...
Northern Monkey yes I’ve shown using copper especially useful for plugging holes. I don’t often use compressed air but it works for cooling too, no doubt about it, but it’s just something I don’t often use. Yes the I is the french symbol for amps. It’s often drawn as a triangle that works both ways. Cheers Trev 👍
Ohms law is
I=v/r
Gas pressure of 6 litres per minute, tried that and the welds were terrible so google'd it and said for car bodywork you need around 10 to 12 litres per minute, turned it up to 10 and now the welds are perfect
It is always best to check gas flow at the torch
Het Trev, enjoy you videos and have learned a lot from you! A couple of years ago you gave a shout out about a friend of yours that also does on sheetmetal work. He had a video that you recommended on how to make and install trunk drip rails. I haven''t been able to find it . Seems like his name started with a 'V'. Does this sound familiar to you? Thanks!!
Trev, this in an unrelated question, but I figured you'd have a good take on this. How do I know if I've sanded a panel good enough to remove the rust? Am I aiming to remove all the dark areas where the rust was or can that be painted over? I'm refinishing my truck bed floor and it's mainly surface rust, but once down to bare metal dark areas are still showing and don't seem like they will buff out easily. Love your videos, bar far one of the most informative channels on body work out there!
Eric Hall obviously it’s nice to see all that rust gone, but if you can get rid of the worst and use something like rustbuster both sides of the panel you should encapsulate the surfaces well enough to have years worth of rust free metal work. The only way of getting rid of it would be to have it shot blasted. Cheers Trev 👍
Uk electric supply is 240 volts , but harmonised to 230 volts , ( European diktat ).. the welder has a transformer , this converts high voltage , low current to low voltage high current . Eg 240 volts 10 amps to 10 volts 240 amps .
OMG mine as well leanin on a HoRse Fence (next to the sign) until my shoes got too wet yowie
Trev. Doing floor pans. Beautiful up top. Pop under to fill couple of pin holes grrrrrr welding upside down, globs, no crackle, adjusted welder up and down and all around. Have done good ones from time to time in the past but whatever I did was a fluke. Yukko. HELP HELP please do a vid.
Poyda Poyderson if you welded the top and the welder ran perfectly then I’m 99% sure that all you need to do is increase your wire speed and leave the power setting as it is. The problem with welding upside down is you’re fighting gravity which can be overcome by increasing wire speed. Cheers Trev 👍
Actually your garden hose example is a brilliant constant current example instead. Same ammount water flows independant of resistance of your thumb on the end. Meaning pressure goes up to maintain same flow through higher resistance. In wire welding the voltage is more or less constant and as you increase wire speed you shorten the arc and resistance so the current goes up instead.
nice,.
Very good video Trev ! Im mainly self taught and pretty much everything you’ve talked about with the mig set up in this video ive come to almost the same conclusion after many years of trial and error ! Ive always used 0.8 but not for any reason its just what my mig came with ... i do have one question, how often should the torch be changed ? Only reason i ask ive just bought a new torch after 25 years ! Im so surprised how well the welder works now !
Paul P ‘s Mini build good to hear from you Paul. I suppose it depends how much use or abuse it’s had. Provided the lance hasn’t been damaged ie badly kinked or ran over. If it’s a Euro torch then all the parts that wear are replaceable, liner, tips, shroud and switch. Cheers Trev 👍
Hey you need to watch The Bank Job, 2008 maybe you have already but your van is in it. It is a Jason Statham flick so check it out. I hope you are keeping it real in a COVIDIOT WORLD!
Funny how the question "why you don't get electrocuted with the spot welder" came up. I have the exact same Mig machine, was doing quarter panel repair with no gloves as was doing spot welds kept getting a small amount of current buzzing through my hand of the bare panel, same feeling as sticking your tongue on a 9V battery. Noticed the earth lead had came loose from the machine but still attached just resting in the socket, was this the cause or perhaps moisture in the air as i weld outside 🙄 was oddity that's for sure. Not felt it again
Mechanical gauges are only accurate at the center third of there reading. You need are smaller reading gauge for more accuracy.
I understand Ron is wearing a Trev's blog t shirt.
do have video how to fabricate a trunk floor ?
I will be making new videos shortly that will cover these types of panels. Cheers Trev 👍
Hi Trev, Is there a particular reason that you use and 95/5 shielding gas versus the 75/25 that’s popular in North America?
My mig welder has an amps setting and meter as well as a voltage meter strangely enough.
I used to use a mig welder that had a voltage dial and display, it also had an amps display also which fluctuated as you were welding to indicate the amps being drawn.
I cannot find a flow meter with a pressure regulator in line anywhere in the former US of A!
Trev you are ansvering the questions I did’nt even think to ask, your’e amazing, I learn a lot from you.
Absolutely bl*** brilliant. Thanks a million.
I have just bought a TIG welder, would you fit a flow meter to this as well? If so, I would buy two.
I see now that I have used much to much gas on my MIG welder.
Jan Q-H yes definitely flow meter for the TIG as you’ll have exactly the same inaccuracies with flow. Cheers Trev 👍
Trev.
My understanding is the opposite of what you said.
1 set the regulator to control the pressure.
And 2 the flow meter to ... control the "flow"
Steve Williams well that’s how I set it up to start with, but as shown in the video the flow isn’t consistent and you get a huge purge of gas. If the flow meter is set to the max it’s still measuring the flow whatever’s flowing through it, you can then regulate that flow using the regulator. You don’t get that purge that way. Cheers Trev 👍
@@trevsblog
I will have to try it.
Do you use that method for TIG too ?
Steve Williams no Steve I hadn’t done but when I next TIG I’ll give it a go. I suppose the amount of purge you’re going to get will be in direct relation to how high the regulator is set. I’m kind of guessing here but the flow meter must let the residual gas pressurise the entire tube from the gas solenoid back to the regulator, when the welder isn’t being used. Then when you press the trigger, that residual pressure is released until the flow meter throttles back the flow. Cheers Trev
Trev, simply love your fabrication videos. I don't know if you know about Fitzee. He does things a bit different. I feel you can never have too much knowledge on a subject, especially when there are so many variables. His main tools are the MIG welder, a cutoff wheel, marker and scribe, and of course body hammer. His method of installing patch panels is to cut both new and old rusted out section at the same time angling the cutoff wheel at 45 degrees. There is a lot more to it than this simple explanation. I will put a link to one of his videos showing how he fabricates and installs. Like you, he makes do with what is available, thinking things out prior to cutting and welding. This is part 1.
ruclips.net/video/Azez3ZYR03c/видео.html
Paul Straney just started using Fitzees method. It's hard to cut as neatly as he does, but the time saved with all the fitting and clamping is brilliant! One has to be careful to not weld the old panel to the new panel. I just purchased some 0.032" cut off wheels. Was using 0.045" andnthebgaps are way too big.
Then I had to order a special nut for the grinder to hold the thin wheel (2 different grinders, neither would hold the cut off wheel without the special nut).
Go ahead and touch it again son, but this time no farting. LOL! I really enjoy watching your videos, but they are a bit lengthy.
Trev, my mig has voltage and amps, would the amps be also wire feed speed as there is a wire feed switch for high and low speed, depending on wire size??
Mick Holgate in short I don’t know. Welders at either end of the budget spectrum have amps controls. The cheaper ones sometimes have a series of switches that control everything with no wire speed dial. Some very expensive welders have a dial that adjusts the feet per minute (of wire) with a digital readout displaying amps and then a separate dial for the voltage also displayed on a digital readout, so you can dial in both volts and amps before you start welding. Others automatically match the wire speed to the volts so you don’t adjust anything else. I once used a welder that increased the volts and wire speed on a variable trigger on the torch. There are many variations but my video was mostly focused on the type of welder that I use that has the two separate control dials. Cheers Trev 👍
My friend Trev, how ican can get a hammer..?
Humarbugo Ballesteros shop open soon 👍
Yeah I think?
.8mm nearly 80% greater mass than .6mm
B
re the flow meters... A man that has a watch or a clock knows the time, a man that has both a clock AND a watch is never sure which is correct.
Pete J 😂 maybe you’re right but what if you lived in two different time zones. The clock for telling you the volume of gas left in the cylinder and the watch for regulating the flow. 👍
Re the gas and the differences in regs - you will never, ever get consistency between cheap brand (which face it, the ones shown all are!!) regs..... Never mind setting the flow rate of gas by the reg/flowmeter that shows what's coming out of the CYLINDER (not bottle), use a pea shooter flow gauge at the nozzle end to get a true reading of gas flow.... cheap as chips (even from the major players - message me privately and I'll send you one gratis ffs!!)..... Thin materials don't necessarily require huge shielding coverage but they do require adequate shielding..... 6ltrs a min is too low..... you need around 10/12ltr min to gain proper coverage/integrity...... Re composition of the shielding gas - you're wasting money for what you do....you're not gonna spray so why use that high an argon blend?? Above 82% is required for effective spray transfer, which the gas shown is.... but you don't do that so why waste money?? Take it from a Yorkshireman - pissing in the wind lad!! You use small cylinders - waste of money!! While you may see a large cylinder as expensive to initially buy/rent, you're overlooking the costs in the long run - larger cylinder, more gas - one rental cost, greater capacity...... Same for pure Argon, just more expensive to do..... You're a body panel guy, I get that - sheet metalwork etc.... me, a welder - working for probably the biggest global player (based here in the UK too) producing quality welding equipment.... I'm nearly 60 been welding since school on and off..... Trust me everyday is a school day... I learn, you learn, we all learn..... Not pulling you down Trev, just attempting to shine a light...... Any assistance just shout man... not got all the answers but can certainly ask...... Message me, honestly we (company I work for) support some huge RUclips creators globally..... there's one of our guys in your area too.... Peace
BRASIL |°o\O/o°|
You talk inches a lot verses metric I wood have thought uk was metric.
George Lewis I’m old enough to still be influenced by predecimal. I was taught everything at school in metric but my father and grandparents talked feet and inches. Cheers Trev 👍