Cutting steel with 2.2 kw spindle

[@Joshua0689]

I wanted to add one thing I noticed if you're interested in getting some feedback. And of course, ignore me if you already know what I'm going on about. At the start of the program, when you're surfacing the steel, there are occasionally bright red sparks shooting out. The steel you're using looks like hot-rolled mild steel. The black mill scale that builds up on the surface when the steel is cooling is much harder than the steel itself (being mostly carbon) and very abrasive on tools. Cutting through the scale can grind tools down really quickly, especially when you hit the really hard spots and it kicks off a red hot chip. The way to get around the issue is to take a deeper first cut so that your tool gets under the scale and cuts steel rather than rubbing against the scale. Of course you say your machine is not super rigid and so that might be possible. Once you get through the surface though, it looks like you are getting decent finishes on your part so nice work. Keep testing the limits.

[@milais9535]

All feedback is good feedback. I'm here to show the world what i made and also to learn new things trough comments. This advice that you gave me is awesome and i will probably remember it for my whole career. Since my machine is not rigid enough to go deeper in steel, i'm building water cooling so the coolant can wash the chips away (and also cool and lubricate the part). But i will also listen to your advice and try go deeper. Thanks! 😄

[@unitedspacepirates9075]

@@milais9535 a few minutes with a flap disk could save 15% or more on your milling bits.

[@milais9535]

@@unitedspacepirates9075 Yes and no. Not the same precision (i'm not as precise as the machine) and i made this machine for crashing milling bits hahaha.

[@fpbibi]

@@milais9535 he was talking about the flap disc to grind off the scale on the steel. The rust removal disc works better in my opinion and scratch less the surface depending on the wanted finish.

[@HAGmbHkeG]

@@milais9535 if you fear a grinding disc will make for a terrible finish you could also try and remove the mill scale with plain vinegar.

[@DodgyBrothersEngineering]

I always find it interesting watching others with similar equipment. My CNC is probably more rigid than yours but I have been fairly reluctant to try cut steel with it. I have cut plenty of aluminum but only attempted steel once. You are hooking into it way faster than my first attempt. I need to drill some precision holes in some 6mm plate to make an engine plate for a remote control mower, but I have been reluctance to give it a go. Looking at the way your machine is cutting steel perhaps I shouldn't be so worried.

[@YooProjects]

Good video bro. The parts looks great. Good luck with your channel 👍

[@milais9535]

That means a lot to me, thanks.

[@TheDIMONART]

Good results! Some info about your cnc? Linear rods or rails, ball screws or lead screws? Welded frame?

[@milais9535]

Thanks, i'm using ebay kit which includes linear rails sbr20 and ball screws sfu1605. You get 1000mm, 600mm and 300mm rails and ball screws in a kit for around 220 dollars. And frame is made of 2mm 30x30mm steel tubes, it is welded but it is not very rigid.

[@riccello]

The catastrophic failure at 1:06 had me

[@jarlrhau]

Good choice of music, always a + :)

[@milais9535]

For machining music AvE, and for machining videos This Old Tony 😂

[@Chris-oj7ro]

kzbin.info/www/bejne/o4nNf3SKoq6lq6s You'll never hear the song the same way again!

[@milais9535]

@@Chris-oj7ro Yeah, Tenacious D is funny and amazing band.

[@tokarka8258]

There should be cooling. A lot of cooling! Cutting speed aprox. From 70m/min to 120m/min and feed 0.05 per tooth. If u'll drop endmill more deeper it wouldn't vibrate because of more cutting square and would not need more cutting power. Endmills 3-4mm 4f is quite suitable for this spindle in parameters of cutting speed and others

[@thebucketmouse]

Holy crap I love the endmill melting at 1:07 lol

[@milais9535]

This machine is made to test tools at full speed without any worries 😂

[@icoblue]

It melted because it was a center drill and not an endmill.

[@stephanuhu963]

Yeah.. Doing friction welding there.

[@victorenriquez4960]

Thanks for sharing Would you like to Share feed speed, tool and spin speed?

[@milais9535]

Hello, thanks for watching and subscribing. I'm copying answer from another comment: "i use carbide end mills with coating. For tool with diameter of 4mm or 6mm i use 0.2mm depth of cut, feed is 750mm/min and speed is around 10k rpm. For 12mm end mill, feed is 500mm/min, speed is around 6k rpm and depth of cut is 0.2mm. My machine is not very rigid, but i think that this feeds and speeds are ok for something handmade."

[@dekonfrost7]

Good work. For such a low power machine.

[@milais9535]

Thanks.

[@targetshooter3751]

RPM = 4 x CS / Tool Dia. (inches) RPM = 4 x 100(steel) / .125 = (3200 RPM --- With Coolant!) FEED = RPM x # of teeth X Chip-load = IPM FEED = 3200 x 4 x .0025 = 32 IPM (With Coolant!) Cutting Speeds --- Steel = 100, Alum = 400, Stainless = 40, wood = 800+ Make the tool as short as possible. Adjust these specs accordingly! Wear safety goggles!

[@targetshooter3751]

Use a .375" cutter for a .0025 chip load, not a .125" - my mistake!

[@Mark_SWZA]

Hi, What speed were you running and what brand Endmill tool was used?

[@milais9535]

Hello, i think that endmill brand was Kennametal, speed was around 10k rpm. What feeds, speeds and depth of cut do you recommend?

[@Mark_SWZA]

@@milais9535 thanks. Don't have much experience with endmills etc but normal drilling then the slower the better. ( To a point) If the bit runs too fast it generates a lot of heat and doesn't cut well.

[@milais9535]

@@Mark_SWZA Actually, i tried running it at around 6k rpm ( lowest speed with this spindle) and end mill vibrated. I'm planning to make a video with various feeds, speeds and depths of cut to find the best settings for this machine. Also, i bought Chinese end mills to see if they are any good. When the end mill or drill bit generate heat, then it dulls.

[@milais9535]

@charlie chaplin I'm using fusion 360 and mach3. Easel works with grbl?

[@milais9535]

@charlie chaplin And what board do you use, Arduino or something else?

[@banka1321]

can you tell me which steel can you cut with a 2,2kw spindle motor? I am beginning to design a cnc and would like to cut some sorts of steel, too. which nema motors do i need for the axes drive? Is a construct of aluminium profile of 40x40mm rigid enough? Thanks in advance!

[@milais9535]

For steel, you need a spindle with lower rpm (500- 6000 rpm) and higher torque, so this is not good for any steel. 40x40mm aluminium profile could be enough sturdy for wood, and maybe light cuts with steel, but better use steel or marble stone.

[@campbellmorrison8540]

What happened to the center drill?

[@milais9535]

Z axis lost steps and plunged center drill too deep .

[@dekonfrost7]

Otherwise known as a crash

[@8thsinner]

I am trying to figure out if the shapeoko pro xxl with the HDZ and 2.2 water cooled spindle will cut out annealed 1095 steel for knife blanks. It looks like it should be able to, but any thoughts on this?

[@milais9535]

Problem with shapeoko is that it has belts instead screws for moving axes and i'm not sure if they are sturdy enough. You can surely try, i'm interested in the results.

[@8thsinner]

@@milais9535 Yeah I have heard this a number of times but I have also seen the older thinner belts chewing up aluminium and brass with well tuned machines with no issues even with routers, copper seems to be the more difficult one to cut because it's relatively hard and tough but very heat prone even compared to steels. The newer thicker belts plus a proper spindle...I think it should do it. I don't need to chew through 1/8th of steel at a time to get big chips and effective cooling, if I can get through it at 10 thou without burn out i'd call it a win even if it takes time. In either case, I am going to test it eventually when I get my machine. Might break a dozen bits to get a good recipe, might end up failing, who knows...

[@guythornhill5324]

What type of end mill did you use? Uncoated / coated carbide or HSS? Do you think it would struggle with a large diameter till, say 6mm? Would 3 or 4 flutes be your first choice?

[@milais9535]

I'm using coated carbide for steel and hss for wood. it wouldn't be a struggle with 6 mm end mill, actually, i'm running 4mm and 6mm end mills with approx the same feeds and speeds. I like to use 4 flute end mills because they are more rigid. 2 or 3 flute end mills are good for aluminium because they have better chip evacuation.

[@rickwest9904]

tattoo machine frame right?

[@milais9535]

Yes, i'm planning to produce tattoo machines.

[@rickwest9904]

@@milais9535 very nice!

[@johannescordier7923]

Very cool , how bout speeds ,feeds the tool ect . thnx.

[@milais9535]

Thanks, i use carbide end mills with coating. For tool with diameter of 4mm or 6mm i use 0.2mm depth of cut, feed is 750mm/min and speed is around 10k rpm. For 12mm end mill, feed is 500mm/min, speed is around 6k rpm and depth of cut is 0.2mm. My machine is not very rigid, but i think that this feeds and speeds are ok for something handmade.

[@jasonharris8728]

@@milais9535 terrible rpm's for steel but maybe that's as slow as your machine will run. I'm surprised you didn't burn up your endmills. That won't last long at those speeds.

[@milais9535]

@@jasonharris8728 Do you have any suggestion about feeds, speeds and depth of cut? And if you like, i can film it and post it on youtube.

[@sgt.jodolf6767]

@@jasonharris8728 using solid carbide and such a light cut, the feeds and speeds are actually pretty good. Feed could be even higher if the machine can handle it.

[@landonhillyard]

Would like to see your entire router.

[@milais9535]

I have in my older videos, a video called "cnc preview" but it is upgraded since then. And i'm upgrading it right now, so there will be new video with all recent upgrades.

[@felipenavas]

+1

[@covad7686]

@@milais9535 is this water or air cooled spindle? 3 or 4 bearings?

[@milais9535]

@@covad7686 It is generic water cooled spindle with 3 bearings (C7005 x2 and C7002 x1) from aliexpress.

[@covad7686]

@@milais9535 Well... I have made several cnc milling machines, more than 20 so far, I got 2.2 and 3.2 kw spindles at current two machines. All water cooled with 4 bearings. Machines that I've made are all heavy, 16-20mm steel plates and 8mm thick square tubes. all grounded. Somehow I've never yet tried to cut steel with GDZ spindle. At the moment I have several spare 2.2 kw spindles, and i would like to thank you, cause your video has inspired me to test the limits of such spindle, and that's what I'll be doing tomorrow and during next couple of days. I haven't even tried to cut steel in the past because I have a standard big and precise milling machine with DRO installed. I think I'll sacrifice currently installed 2.2kw spindle and will measure all of the deflections, runouts and other problems that will occur during different methods, speeds and depths of cutting. Thanks again!

[@seldonkoper1246]

Very nice looking cut

[@milais9535]

Tnx bro

[@satchelsieniewicz5824]

cuts out of middle of stock :?

[@milais9535]

Yes. I planned for a cut to be approx. in the right corner, but as you can see in the video at 1:06 , i had a problem with my center drill, so i had to start all over again with a drill bit in a different place.

[@Yuuki1942]

Nice but when you see metal chips fly around like that it shows that the frame is not solid.

[@milais9535]

Thanks, this machine is designed for wood and it is not so solid, but apparently, it can cut metal too.

[@Buciasda33]

Scratching steel with 2.2kW Spindle. You have to use Low RPM for Steel. The melting center drill is proof. You need 1000 - 3000RPM and that Spindle or VFD doesn't provide Torque or Power at low rpm. You will also destroy the bearings because you can't cut steel if your machine has ball bearings. You need roller bearings everywhere

[@fubartotale3389]

1:07 LOL!

[@Thewaldo12345]

RIP center drill lol.

[@GetF8]

Yeah! I was wondering where things were going after that meltdown but the recovery was good and the finish line was reached. Haha!

[@bogest76]

Better use coolant.

[@milais9535]

Next time.

[@aqib2000]

Next time plunge cut

[@milais9535]

Sure 👍

[@dolfstromer3498]

Centro drill died :(

[@fahdalshagga]

Add Oli

[@milais9535]

I will, in the next video.

[@fubartotale3389]

I would suggest Acculube if you have a compressor. Flood cooling is more trouble than its worth on a small machine. Uses vegatable oil and very little.

[@milais9535]

@@fubartotale3389 I do have a compressor, but it is small and noisy. I'm currently rebuilding my machine and it will have cooling with an emulsion. And water pump is not noisy like compressor.

[@raymondcandiotes4639]

What a horrible finish!!!!

[@milais9535]

Thanks man!

[@tomtlrech1392]

​@@milais9535about as good as I get trying to cut aluminum on a 3018 ;) wet noodles of the machine world have to stick together!

[@alieker5815]

Bence dostum sen bu işleri yapma başka video çek seni izleyen meslektaşları işten soğutma

[@draxusbaba]

adam ev yapımı router ile metal kesiyor farkında mısın? Sen daha iyisini yap görelim...

[@alieker5815]

@@draxusbaba sen tasalanma iyisini yapıyorum ev değil el yapımı

[@draxusbaba]

@@alieker5815 tabi ki yapıyorsundur. el ya da ev yapımı neyse bu işlerle uğraşmanın ne kadar zor olduğunu da biliyorsundur. Aksi halde karşı tarafı küçümseyici yorum yapardın :)

[@alieker5815]

@@draxusbaba emek benim için ibadet kadar değerlidir kucumsemiyorum sadece biraz abartma yapılmış onu dillendirdim bir nevi iyi bir eleştiri olarak say