🆕K40 40 Watt Laser Cutter- EVERY Mod & Setup I have Done in ONE Video! 🎉🛠

[@MKmeMedia]

Buy the K40 Amazon: amzn.to/3aNWrWk Cheaper on eBay: rover.ebay.com/rover/1/706-53473-19255-0/1?mpre=https%3A%2F%2Fwww.ebay.ca%2Fsch%2Fi.html%3F_from%3DR40%26_trksid%3Dp2334524.m570.l1311%26_nkw%3D40w%2Blaser%2Bcutter%26_sacat%3D0%26LH_TitleDesc%3D0%26_osacat%3D0%26_odkw%3D40%2Bwatt%2Blaser%2Bcutter&campid=5338581870&toolid=20008

[@tombackhouse9121]

Got a K40 about a week ago, really happy with it. The optics seem to be in good alignment out of the box, the bed has a removable flush plate covering the clamp in those things, and the top of the bed seems to be about 1.5-2mm below the focal point of the lens. The extractor fan seems to be a decent equipment fan with a good flow, not one of those junky plastic boxes most of them apparently come with, and the extraction nozzle inside is the full width of the working area and seems quite effective, and it came with one of those spiral foil type hoses, which seems a bit more substantial than the blue plastic ones I've seen with other people's. All in all, I'm very happy with it, as most of the things which everyone says you absolutely must modify seem to have been done for me. All I've had to do myself is properly to earth the case, and to install an ammeter in series with the tube, since I got one of the ones with a digital display. All in all, having looked into these machines a couple of times over the years, I'm only sorry I didn't take the plunge much sooner.

[@glennmartonic6376]

k40 whisperer was a game changer for the k40...i now have built my own 600x400 co2 laser using the k40 control board, 45w spt laser.....have had for 3+ years.....spt makes great tubes.....they are actually tested with info like peak power......made motorized bed out of 1x1 steel tube and 3d printed parts....total cost was $900....well worth it as its paid for itself many times over

[@tzsetzse]

Im upgrading my K40 clone to a 60 watt tube and power supply. I also have a Meanwell supply from an old Ender 3 pro I want to use , keeping the main PSU strictly for the tube driver. However, the wiring is proving to br problematic for me. I wish we could post photos here, too for a better example of what Im about. The stock 40 watt supply is radically different from the Cloudray M60 as far as connections go. I searched the internet for wiring diagrams but no luck for my specific power supplys. your video is excellent in as much as it addresses other issues I will face in modding. Thank you!

[@ydfah]

For the front vents, you can increase the air flow through them simply by twisting all of the metal strips running up and down. About 15-20 degrees each should do it

[@salesclerk]

Thumbs up for the "pew pew" XD thank you for the videos, watched the short one first. I have 3 3D printers and just ordered my laser cutter after watching your videos

[@MKmeMedia]

Have fun!

[@ericmillward5264]

@@MKmeMedia is this laser 110 or 220 as far as plugging it in

[@joeblogs4146]

Just like to say something that might help anyone - I've put a 12v PC type fan mounted on the inside of the door blowing air towards the rear of the extraction port ( that I've removed as it got in the way and useless as everyone knows! But putting the fan on the door(edited) > on the inside) has solved all smoke problems as well as a micro switch that cuts off the laser if the lid is lifted, Anyway great video! From the UK.

[@ga5712]

Is there a 12V supply on the board that can be used or are you using a separate supply? Also how are you getting on with coral draw? I've never done any of this design work before but gather the default board driver and coral draw are Crap... I've seen many suggestions of swapping out the board.

[@ssijak1]

Got my hands on a K40 a few days ago. I didn't have to set up the mirrors, they were all set up already.... great video... Now I must mod the exhaust too...

[@curtisstiggins2767]

great video. my question is what is the switch for next to the E stop? thanks

[@MkmeOrg]

Master power switch

[@StevePrior]

I made a point of running the stock hardware and software for a couple of engraves to find any defective parts before gutting the machine for upgrades like you did.

[@MKmeMedia]

"gutting" lol

[@StevePrior]

@@MKmeMedia I replaced the controller with a Smoothieboard and installed the Lightobjects motorized Z and air assist capable head (haven't actually done the air assist yet). Using Inkscape (or Fusion 360) and Laserweb3 to run it.

[@tekmason7736]

I like the raw footage. Keep it coming.

[@splinejunky]

You could add a piece of spark arrestor screen over the hole in the back

[@richardking7996]

Hi Eric. I'm here in the UK, That ideal of your's of removing that exhaust port at the back makes sense to me too, I've cut mine back and fitted an inline extraction fan which is meant for bathrooms. But it doesn't remove the smoke as well as I would like, so I'm going to remove the port as you have done and hopefully that will improve things. Thanks for the tip. Best Regards Richard

[@MKmeMedia]

Excellent!

[@richardking7996]

@KodaKayde Yes, it makes a big difference to the smoke extraction, and having some spacers under the front of the lid of about 1/2 inch helps with the airflow across the bed. I have sold my K40 now and bought a 4060 laser machine which is based on the K40 but has a bed size of 400 x 600mm cutting area with air assist and a big extraction fan fitted as standard. The only mod I've done to this is fit a big air-assist compressor which gives me very clean cuts.

[@rebornspawn]

Loads of interesting content fella, you missed one crucial thing though. When you took the bed out and messed up the laser mirrors. How did you realign the laser once you put the bed back in?? That was a very important step to miss out. I'd love to extend my printing footprint but I'm not confident in the realignment of the laser. Please help Many thanks in advance sir. Keep up the cool content 👊

[@rvillago]

how did you set up the focal length?

[@marcelinobarba8962]

Now that you remove the protruding vent, what maximun size workpiece you can put inside.. thanks

[@DrumMenace]

I know this an after-the-fact statement, but you could have placed a metallic screen over the rear air-vent if you were concerned with embers. Just a thought.

[@michaella4347]

Great vid and a lot of good ideas! Just one thing, watch how fast you slide the gantry! - The steppers motors become generators when spun quickly; this can back-feed voltage to the board and smoke it!

[@MasterRend4n]

can you maybe some time do a video where you test the cutting method on the machine with acrylics? great video btw :D

[@jamietheodore5020]

This is a GREAT resource THANK YOU! do you have a list of all the accessories you added?

[@김광수-y2f2k]

Great video!! I am in Korea. Is the antifreeze used for laser tube cooling mixed with water? What percentage, then, each?

[@MilanKarakas]

Oh, man. I should stop watching videos about this beautiful laser cutter. My wife is angry when I have idea to buy one. :D

[@JamesW81]

Explain to her that you can make things to sell on eBay so it will pay for itself.... Just make sure you follow through!

[@emrok9849]

Probably a stupid question. But what did you did you do for the ground cable? I have the same machine.

[@atomic6557]

Would you be able to laser staple a polymer 80 frame

[@BMSWEB]

Only just purchased one of these a week ago! can't wait to get it going 😍 Awesome video buddy

[@MKmeMedia]

Excellent!

[@AhmedSara22]

I have an issue I just bought it. Everything look okay accept there’s no laser when trying the laser ? Do you have any experience with this issue?

[@NOYPIMOTOUK]

hey Eric, i wonder if i could buy a air assist nozzle that you made on your 3D printer. I have been looking for one that is gonna fit on my K40 but I have not been able to get a better one like yours. please. I'll pay for the shipping cost and for the cost of the 3D printed. Please. I would appreciate if you could. Thank you.

[@pgabrieli]

thank you very much for the video. excellent info! just a question, if I may: what’s the total printable area now? thanks again!

[@ΓιώργοςΣτουμπης-ξ9φ]

when you engraving or cut wood or plexi glass what are your speeds?

[@MKmeMedia]

Really depends on how the material reacts.

[@alideerhana1]

Can you tell me the name of the pc software that you use please ?

[@MkmeOrg]

K40 Whisperer

[@andreik8013]

Many thanks. I join the team of admirers. Very informative and detailed. Curious only: anyone tried to add to X and Y of this laser Z direction? Changing, obviously, a controller. Or I am dreaming...

[@cirobranchizio8812]

Eric, thank you for sharing, I do have a question. Can a K40 laser engrave on glass and natural stone?

[@rayxfinkle8328]

It's not a great answer but yes and no. Some glass It does just fine same with stone. Others not so much

[@luvdyetee2224]

this is the first time I've seen so many colors on a blinds. haha

[@MrPhantom302]

Hi there , were did you get the file for the air ? Thanks and hang in there

[@JointerMark]

Hello Eric, I see you are using antifreeze in your laser cutter. What part of Canada are you in; I'm in Brandon and trying to judge if I should set up my K40 (on order) in my unheated shop or keep it in the house.

[@MKmeMedia]

SW Ontario. Mine is unheated- my only concern is firing it up when cold and having the thermal delta from glass to coolant trigger an explosion/crack. So far at freezing there was no issue. Debating on putting a block heater in the coolant and just leave it on all winter to avoid the chance of destroying the tube. So far its fine

[@Luis__Martin.]

You can solve that by installing two lamps of about 30-40W in the part of the tube, so it will maintain a temperature in the tube.

[@JointerMark]

@@Luis__Martin. I don't know if I'd rely on two bulbs preventing my laser tube from freezing at -40. That would probably be okay for warmer parts but here in Manitoba I think I will just keep the laser engraver inside!

[@Luis__Martin.]

@@JointerMark kzbin.info/www/bejne/hHLMfqWDfLlkhZI

[@ΓιώργοςΣτουμπης-ξ9φ]

hi sir i have a big problem with my lazer k40 c02 my lazer can not to cut cardboard please say me whose is the problem?

[@thebosun181]

Can it run lightburn? If so I'm in!

[@DrFiero]

Not with the stock board. But really, you should ditch it anyhow for a more modern 32 bit one!

[@samsical2597]

Have you found any issues with arcing using the auto coolant?

[@MKmeMedia]

Nope

[@jamzempire]

Neither have I!

[@rebeccamarshall9269]

All the videos I watched used distilled water for coolant you are the first who has used anti freeze. I have now had 2 tubes crack due to freezing! Have you had any problems using anti freeze or is that the way I should go too?

[@MKmeMedia]

Its -15C here right now so water is a bad idea.

[@jamzempire]

I use antifreeze as well and I haven’t noticed a drop in power....

[@rebeccamarshall9269]

@@jamzempire Did you just use anti freeze or did you mix it with distilled water too?

[@jamzempire]

@@rebeccamarshall9269 i bought the 50/50 mix from autozone then mixed it with distilled water.

[@cwallace91472]

I recently purchased a preenex 4w0 laser and was told it could NOT be modified to use a rotary tool. Are there models that cannot be hacked to use one?

[@MKmeMedia]

The K40s work fine with a rotary attachment. You have to cut out the bottom to get the height though.

[@jamzempire]

It can be used... I’m currently using a preenex with a ftg rotary

[@farhansulaeman6001]

Hi there, i just bought my k40 laser. First time i turn it on, the laser home point was at the top right corner. How to make ot to top left corner.?

[@rayxfinkle8328]

It can either be changed via gcode or depending on what program you use you can specify your home position.

[@vk2let]

where can I find the code for the air assist nozzle mate?

[@MKmeMedia]

In the linked repo

[@samirsingh9613]

HI, i am India, Mumbai. Interested in buying this but not this machine is not showing on Amazon Pls help How can i get it in India Regards Samir

[@X400DYL]

Hi What is your 3D Printer, looks nice

[@MKmeMedia]

It's the i3 Mega. amzn.to/3uZtukk Its pretty amazing

[@cipriansofineti346]

Vevor 40W is the same as K40?

[@DrFiero]

K40 is kind of a generic term that refers to 'all of them' that are this form. Think "Kleenex" - it's tissue paper. ;)

[@claytonstoltz1992]

where did you get the drag chain from?

[@MKmeMedia]

Amazon- all links in my Github

[@endall39]

raw footage version is great! Are you selling the 3D printed parts needed for these mods? Thanks for sharing!

[@MKmeMedia]

Sorry no- I didnt design them so cant sell

[@ThunderPantz01]

go Canada.I am guessing from your accent your from the eastern side of the country. Canadian Tire FTW LOL. Saskatchewan here

[@MKmeMedia]

Ontareeeeeooooooo

[@kevinjones6924]

Great video Eric! Just wondering how after a year how it's all working for you with the K40? Any other modifications or changes? Did you figure out that taped thing on the waterline by the laser?? 🤣😂😅 I bought the exact same one and have done quite a few mods to mine as well 😊. I think I seen somewhere on one of your other videos that you're from Goderich ON, I'm not too far from you, Windsor ON lol. Good to see a fellow Ontarian on KZbin!

[@MKmeMedia]

It was the temp sensor :) Still works great. Cheers

[@GigaVids]

you probably shouldn't move your servos around while they are powered that's a good way to fry your control board

[@LuisVargasLeon]

Hello, great video. I´m building CNC laser CO2 of 40W. I´m using the M2 nano controller, same your machine, but I dont know Which motor use. I know are Nema 17, but I´d like to know the model. SO, Can you view the model motor in your machine . the motor has a label o sticker where indicate the model, please. Regard

[@aceb.1735]

This is a great video. Helped me make my choice

[@shelby50411]

Are these stock 350$ laser machines any good?

[@MKmeMedia]

Yep

[@alpscraftshack599]

Most of the time these machines, as they com e right out of the box, need some tinkering in order to give a somewhat decent cut. If you want really good cuts, then you will have to do modifications to the machine.

[@3588only]

HMKme Media, I'm planning to purchase this machine, but I think assembling it myself just puts me off. Doe's the machine come fully assembled, connected to your PC switch it on ready to go.

[@MKmeMedia]

The K40 takes some tweaking

[@alibhaigroupmwanza9135]

hi, my XY 0 position keeps on moving forward everytime i reset. can you help me out with this

[@kendallemory8455]

Sounds like your home switch is having a fit. Are you running k40 whisperer?

[@rebeccamarshall9269]

Brilliant, very informative. Thank you

[@JustinTyme1966]

Thank you for taking the time to make and share this video, This is one of the better ones. I ordered my first K40 a few days ago and the tracking says I should get it in 3 days. I looked down in the comments section of this video and on your linked pages and cant find the files to print the air assist. Would you be willing to share or sell them? Again Thank you.

[@parker1ray]

Decreasing diameter increases velocity!

[@MkmeOrg]

Not mass flow which is what is needed

[@WorkerBee2011]

Great stuff sub’d

[@Bobster986]

What if you installed one or two computer fans where those vents are in front to increase the air flow through the machine?

[@Luis__Martin.]

Be careful, the power source does not support more consumption, it is very limited.

[@danieldenault8575]

pew pew... pew pew pew..... thank you for the laugh sir

[@mr1enrollment]

Not really an engineered device. More like tossed together. Note the air duct reduction causes higher velocity of air flow. You may have made a mistake removing it. Shortening yes maybe total removal maybe not.

[@MKmeMedia]

CFM is pretty basic physics...

[@mr1enrollment]

@@MKmeMedia anyone who thinks CFM is a simple basic part of physics knows virtually nothing about the subject.

[@jhm8071]

@@mr1enrollment What's wrong with having more air flow here? You want to clear the smoke out of the cutting area as fast as possible.

[@donaldcudak2351]

@@mr1enrollment agreed, cfm and airflow velocity are two parts of the equation , subtract static pressure. Doing commercial exhaust systems, there is a lot to consider. Hes needs to think simple as what happens to suction when you install a clevis on vacuum= increased velocity and suction power. Just shorten by 12mm, you also want it up as high as they had it. Just slightly above burn, not under, and under the ZnSe focus lens

[@MkmeOrg]

@@donaldcudak2351 Shocker- Max mass flow is the key and I was right.

[@josegomezechevarrieta1166]

cuanto sale?

[@pedroramos4335]

alrededor de $400 en USA

[@coalakida]

Does anyone sell these pre modded, ready to go, Im a buyer .

[@MKmeMedia]

Don't think so

[@shelby50411]

Hi..i was told by someone that tested watt output...that all these ebay k40 are fake specs...and not 700mm 40w tubes...they are 600mm 20w tubes... ...can anyone else confirm this?

[@Luis__Martin.]

The majority are 700 mm. and 35W.

[@alpscraftshack599]

The actual output put of the K40 varies between 30 to 35 watts, depending on the tube brand. I have found most to be right around 30 to 32.

[@georgedugoniths2931]

Muse engraver

[@GeorgeGraves]

Light right in your eyes - that sucks

[@jimborst4697]

TURN DOWN THE BLASTING SOUNDS

[@AllanSavolainen]

I was amuzed, guy says about the air duct that it is simple physics and misses totally the point that having the opening smaller creates faster airflow...

[@MkmeOrg]

Faster is useless- mass flow is what is needed. Physics.

[@cMrob73]

Why invest money into this piece of equipment if you have to rehaul it after you get it. Everybody, like myself, is not laser smart, not even to understand what you are sharing.

[@MKmeMedia]

The K40 is not for you...

[@cMrob73]

@@MKmeMedia I guess not..