Changing Tube in C02 Chinese laser cutter.
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- เผยแพร่เมื่อ 13 ธ.ค. 2016
- Simple process of replacing laser tube in typical chinese CO2 laser cutter.
The replacement tube in this video was a brand called Cole Tech, from an ebay seller. The brand is junk and I got a refund shortly after. Cloudray branded tubes also appear to be junk and should be avoided.
The best performing low-cost chinese tubes I have found is a brand called Tongli, sold on aliexpress. It was about 2/3 the price and 2 I have used have worked great so far.
Not a very dangerous procedure, but 22kV and mains voltage should be treated with care.
Sorry for poor quality of this video, but I don't really get a change to do additional takes with this one. - แนวปฏิบัติและการใช้ชีวิต
So I have a "50W" laser from ebay. I think it's the same as yours but with red paint instead of blue. It's a Shenhui 350G. Mine came with a Tongli tube, which has now failed at about 2.5 years of age. I'm watching this video so I'll know how to install my new SPT tube, which is 200mm longer than my original tube :-)
You said you wanted to do something else with the old tube. What do you have planned for that? Asking because I just changed tubes and hate to just bin the old one. Thanks!
You did disconnect from the mains first also right?
The tube's terminals needs to be grinded with a small metal-file until the metal is bright/reflective prior installation. So are the wiring's cores, those must show bare copper and be reflective (gently scrape them with a razor blade). This is to remove the highly resistive oxidation from the conductors, ensure good contact, and prevent potentially lethal arcing. #stay safe!
Something I recently learned, the outlet of the water should point straight up you have yours at a 45 degree angle, may want to fix that.
It looks like I have the same 50 watt laser. I was wondering if you ever upgraded to a 60 watt tube ?
How do I figure out what tube I will need. My machine looks a lot like yours. Thanks for the video. I'll tell you what's going on. Tonight at the left side of the Tube it started Arching and making a snapping noise. I assume it needs a new tube. Any other Ideas.
Did you get a Tongli 40w?
hy sir can u help me i have laser machine 100w when i turn machine with watter chiller ruida controller box light no 15 is burn also beep
and machine lcd is bilinking
if i turn off water chiller then machine is turn on with out any problem
can u tell me whats worng with machine
thankx
This is the best video on this topic. I have an issue with my 40w tube. It lights up the tube but is not focused & emits no beam. The small piece of rubber tube (on the left) is not secured. Could that be the cause? Should it be glued on? I would really appreciate your help with this. I don't know if I need a new tube. The power just suddenly dissipated to nothing one day.
Email me for help on this. Address is about section of channel page.
Having been bitten by the EHT(15kV) from a studio colour monitor many moons ago I cringed a little when you stuck that nice Fluke meter across the EHT lead! I would have been more inclined to just use a clip lead with say a 1Meg resistor to ground to ensure it was discharged but of course the tube is less likely to act like a dirty big capacitor like CRT do. I did notice some discolouration on your chassis where the EHT lead came up and over the edge, has it been arcing there?
That's probably a better idea for testing. Even getting out the kmart multimeter for that job would have been a more wise choice.
I've never noticed any arcing issues. It looked like a small bit of water leakage and dust.
How did you know you had to replace the bulb? What signs or problems did you have to make you want to change bulb?
As the tube nears the ends of it's useful life (maybe 12-18 months) the power starts dropping a lot. My max output power was only about a third it was when new.
How do you dispose of the old one ? Do you toss it out , recycle , or does it need to be taken somewhere special ? Thanks.
Toss it out with your regular garbage.
They can't be filled with gas again and they contain no hazardous materials that require special handling.
@@makestuffnow thanks you! Also, I have never done anything like this but it looks fairly easy, anyway, is there anything dangerous about it that I should be aware of? Safety precautions. I'm really debating whether I do it or not
@@Moochers Only possible danger is the high voltage.
-Make sure to unplug machine completely from mains power and you will be safe while working.
-The red wire from the power supply has extra thick insulation plastic around it. Only use the same wire. Don't replace it with anything other than wire specially made for this purpose. (the ground wire doesn't matter though).
-Insulate the connections well with silicone. Even if you do get it wrong, the machine case is gorunded so you will just hear a big bang when you start the laser but it wont damage anything.
@@makestuffnow thanks so much for reaching out. Doesn't seem too dangerous. Only thing is idk if the machine is really grounded or not! Lol
A question. Why does my laser tube spark where the red wire is connected?
Likely loose connection or poorly insulated.
If you're confident that connection is good, then sometimes the tubes are just no good.
Question: That $270 you quoted earlier, is that US or Aussie dollars that you paid in? (fellow Aussie here).
Aussie dollars. Aliexpress usually shows us the price in US$ so be alert when shopping there. But they are pretty good.
For a disposable grade tube I'm pretty happy with these tongli brand ones, and will keep using them until I become rich enough for a bigger machine
Ahh that's even better! my current tube seems to be doing alright at the moment, but like anything I'm sure it will eventually lose it's steam (or CO2 Gas lol) and be less effective. $270 AUD is a pretty great price.
I've seen some of your other videos, I'm interested in eventually changing the table surface at some point and I like the acrylic barrier you built for the xy-zero
That isn't an A grade tube AND it is really a 30 watt tube due to it being 700mm. My machine suffers from what almost all do and that is it came with a B grade tube and will not do engraving due to it. It will cut, and scan but true dots no.
@@makestuffnow Greetings, long time no talk, my tube is arcing at the moment and I think I might have to consider getting a new one. I can't seem to find any Tongli listings at the moment, are you still using your 50w Blue/White laser these days? Any tips for a fellow Aussie here?
@@TheGeeMan The last tube I bought just over a year ago from aliexpress was from a store/brand called Will Feng. That tube along with a set of copper mirrors I bought at the same time is still going at full strength and cutting better than any other setup I have used before.
Brother can you please help to resolve cutting power issue with my leaser machine ZY1325
To funny I just was looking for a video on this for this laser. Saw your videos and subscribed, got up today and you had a video on it! Nice thanks. Have you tested it power wise vs your other one? where did you get the new tube and is it rated for more then your other one?
Like most people end up finding, this "50W" one only measured 37W (like the other one was when it was fresh).
I've been hassling the seller to repay me the difference for selling me a 40W tube advertised as 50W.
I even just notices from their emails that these bastards named their ebay store after a more reputable tube seller they have no apparent connection to. So I will probably launch a paypal claim to recover the full amount if they don't act soon.
makestuffnow! I'm having a loss in power in my "50w" laser. what should I do, or what videos should I watch first? I'm not what is the most likely culprit?
Not sure what is*
Check mirror alignment th-cam.com/video/e1c3keOKL6Y/w-d-xo.html
The cheap mirror mounts can sometimes work their way loose with all the motion of the slides. I need to tweak the final mirror a little about every 3-4 weeks.
At the same time check mirrors/lens for burn marks or dirty smudges and clean/replace if needed.
Other than that, if the tube is around a year old it is probably getting close to the end of it's working like and not much you can practically do except for buying a replacement.
do you have a suggestion on what to get? sorry to bombard you with the questions, you've been the first to actually make videos that are technical about this fucking machine.
Hello, thank you for the video. I was wondering how to reset the coordinates for laser head. I have a Chinese laser machine looks like yours and the belts slipped a little.
If the reset button is not fixing it, then switching it on and off should set it back in place. It should be set up to go to home position every time it starts up.
makestuffnow! Unfortunately reset button doesn't. And startup reset also doesn't.To be more clear, the ,0,0 point was about 7 cm to a certain point to right and about 2.5 cm to a certain point to top. Now it's about 3 cm to right and 2cm to top for the same certained points. Today I checked the mechanics of the head movement (belts, gears, rails...) and realized that there are 2 switches responsible for determining the 0,0 point while the machine resets. and they are working smoothly. So is there any way in the software to reset the coordinates? or better to reset all the machine settings?
Sorry for long reply and thank you in advance.
On the control panel on the machine go to the menu. Select 'axis reset'. if this doesn't work, you can try selecting "set fact para' which will restore factory settings, password likely to be CC8888. If that doesn't work then it is likely something physically jammed or offset on the rails.
makestuffnow! Thank you very much. Today I'm far from the machine, I will try the factory reset tomorrow.
There is another big problem, it's when I use engraving (scan), the final shape will be diagonal like this ( \ ). what is the possible reason for this. thanks again.
I would like to know where you got the tube also.
It's shit. You don't want it.
Hi, thanks for your video!
does anyone know why my red cable connected to the tube makes a strong electricity spark when i press pulse button? many thanks in advance
Possibilities could be-
1) Poorly insulated connection at tube
2) Dead or almost dead tube
3) Bad power supply
Check connection first. Make sure it is tightly wound and insulated properly. If it arcs in pulse mode, but is ok when cutting from a file it might be the power supply. But there are many ways a bad tube can cause arcing, so a bad tube would be the most likely problem.
Thank you for your reply! I bought a new tube recently, it is tightly wounded with a glue gun insulated, but not sure how well it should insulated! does electricity tape would do the job? and in regard with the tube being bad, is this something I should blame the sender from korea?
kind regards
Glue gun is not recommended, one of the reasons is the heat when applying the glue can damage the connector on the tube. But if the glue is covering all of the metal at the conenction, it should insulate well enough. Electrical tape is not good enough.
If you are confident the connection is well insulated, and the power supply worked fine on the previous tube, then you should contact the tube seller for support.
Thank you! thats been very helpful, I appreciated!
@@makestuffnow please..please for the sake of god dont give people advice like this if you do not have the appropriate knowledge...your comments could literally cause death in this case..
He's gotta me Aussie... He speaks exactly the same as I do..
Hello, Tongli or Yongli? What power tube it is?please
The one in the video turned out to be junk. I replaced it with Tongli branded tube, which can be found on AliExpress.
"50W" tube, output power measured 42W real power, which is pretty good for cheating Chinese measurements.
ok, thank you :-)
I personally have advanced laser tube production technology and are willing to cooperate in the production of laser tubes?
Would you share your STL files?
Future reference tips for you, IPA will eat silicon, Just dab a bit on it and whip off, No need for sharp objects lmaoo
Light Objects is selling a fake SPT tube so where in the USA can I find a grade A tube?
I know nothing of the USA market, but I buy mine from China on aliexpress on the assumption I am going to throw them out and replace them in about 2 years anyway. The brand I mention in the video description has worked fine for me so far.
Does it work fine for you with image engraving using dithering? Mine does not as its response time is in the neighborhood of 56-60ms.
Works fine. I usually set my dithering at 300dpi at a speed of 200mm/s and it has no problem.
After testing mine with a 1/3 pattern I did the math and this power supply will never dither. It will cut, and scan but is just not fast enough to ever dither. Thank you for your help.
I actually found out it wasn't my tube after I posted as it is my power supply that is the slow bitch and not the tube. Tube is fine now but where can I find a real, and proper, power supply that really does have a
How much did you pay for the tube
About $270, including shipping. With heavy use need to replace after about 12 months.
I don't know anywhere local to get tubes refilled, I would be weeks without a tube sending it to the USA, so I know nothing of the economics of using refillable tubes instead.
IF your machine came with a glass tube from China, it is very important to learn and practice this procedure as you will be doing it often!
an average multi meter probe will not insulate you properly to 20kv, please be careful before holding things directly touching the 20kv terminal, even if power is off it can still retain enough power for a while to kill you
Roll your water outlet so it points straight up
there is a piece of water tubing connecting the body of the laser tube to the end of the tube. This part pointed up can also trap small air pockets.
It will cool fine either way.
Don't buy epoxied tubes folks!
pay more for a HARD SEAL CO2 laser tube, you won't be sorry. I would buy one with a re-sealable gas opening so I could refill it.