What machine do you recommend to cut aluminum if the budget is $1000?

@DesignPrototypeTest

3 жыл бұрын

This one is promising, but I haven't tried to cut Aluminum with it yet: www.amazon.com/Machine-4040-XE-Spindle-Engraving-Engravable/dp/B08M96HHKW/ref=sr_1_1?dchild=1&keywords=cnc+router+4040&qid=1605163511&sr=8-1 I will be making a serious video on that CNC machine in the near future. At that price piont I think your only other option is to DIY something.

@ballzybaits4414

3 жыл бұрын

@@DesignPrototypeTest Thanks for replying. I'll have to look at that machine.

@ballzybaits4414

3 жыл бұрын

@@ClintonCaraway-CNC I went with sainsmart 3018 to test the waters. I'm stuck at resetting machine coordinates to zero. Been trying and researching for the past few days with no avail. getting frustrated for sure.

@maikel371

3 жыл бұрын

MPCNC

@ballzybaits4414

3 жыл бұрын

@@pentachronic I'm in a few of them. I'm having issue with machine zero coordinates. Got everything else. Seems like I'm missing the software side of it. Playing with Candle atm.

It was cutting metal parts that were good enough to work but needed a couple changes to cut better (not more parts). I've been cutting metal on my machine for 10 years (it's a couple tiers up from that machine) *Tips for anyone trying to cut ALU or Brass:* 1. *Suck the bit up* as far in the collet as you can (not on the flutes, but as close as you can). It makes a big difference. 2. *Deep cutter-width slots are a no-no!* Set your profile cuts at least to at least *1.5x cutter width* (also helps with clearing chips). It will take twice as many passes, but your bit will thank you and your surface finish will be much better. 3. profile cutting: if you can, precut/drill a hole in the middle and make sure your path starts from the hole. You will be able to take deeper cuts as it is *side-cutting instead of slotting* (As soon as saw your deep narrow slot, I knew immediately it would break a bits and/or lose steps.) 4. If cutting dry/air only: *Use WD40* Frequent squirts cool the bit and give it a coating that resists chips sticking. 5. *Buy better/midrange cutters* $5-8 cutters make your machine cut so much better than $1-3 cheapies. (don't buy expensive cutters until you learn how not to break them) 6. *Cut chips not dust!* Dust = wearing out bits fast with almost no material removal. (small chips are ok, but grey dust isn't) 7. *Don't cut steel.* Just don't. Your machine will damage it's self even if you can't see the damage immediately. e.g. My motor shaft coupler started slowly fatigue cracking and then later snapped and caused a nasty crash that actually bent my Z ballscrew... sniffle. Purchasing tip: 8. Get a machine with the largest dia *ballscrews (not leadscrews)* and largest rails you can. The water cooled spindles are also much quieter. Upgrade tip: 9. *Flood coolant* with water/cutting fluid: if you plan to cut metal a lot and are willing to set it up, this *will massively increase your machine's cutting capability.* Seriously, I went from struggling to cut metal at all - to wondering how far I should push my cuts. Not only does it blast chips away and cool the bit, but it also reduces vibrations and noise! (straight water will rust everything including your cutter's crisp edge needed to cut well) I use a cheap fountain pump and water soluble cutting fluid. My machine sits on a tilted table with angle alu edges to keep the water in, then it all runs into a rubbermade tote with the pump in it. Linelock makes directing the flow much easier and isn't too expensive for a foot or so of it, but I started with a coat hanger wire ziptied to a piece of hose! PS. I'm not saying you should go back and try that machine again. It is just going to be on the painful side. But it was doing it until the too deep narrow slot started chattering too much. So for anyone else, who already has a machine and can't afford to just go buy another machine, I hope these tips help.

Videos like this - where things Don't work out - are way more truthful and helpful than polished and edited videos where everything works perfect the first time. Thank you, sir!

@jbbw667

3 жыл бұрын

This is what I thought too.

This video will save countless viewers from failure for aluminium routing projects - thanks for the time, effort and expense you went through to produce this video.

@rafiqsaid4297

3 жыл бұрын

Agree

Actual machinist here: It may seem odd, but you can often remove chatter by increasing feed, or decreasing rpm. Keeping a high load on the cutter makes it unable to jump around. Adjusting feed/RPM while making a cut is a good way to find the right numbers. What the read in online calculators is just a starting number, you find the ones you need by adjusting and listening.

@Skinflaps_Meatslapper

3 жыл бұрын

That's definitely true, and part of the problem with these little hobby machines is that they generally don't have enough muscle to give a carbide bit what it wants to eat.

@brahtrumpwonbigly7309

3 жыл бұрын

That is true for a better setup, but this is likely due to a lack of rigidity and power that will not be overcome without losing your precision. Might work to a degree for roughing but I doubt it in this setup.

@brahtrumpwonbigly7309

3 жыл бұрын

@@Skinflaps_Meatslapper I think people glorify carbide as an industry standard whan HSS is generally a better option for low power machines too. It's easier to get it to bite since has a finer edge usually.

@Skinflaps_Meatslapper

3 жыл бұрын

@@brahtrumpwonbigly7309 It's surprising how dull most carbide inserts are when new, and that's part of the problem. You need more force to get the duller insert to cut, but since it's such a hard alloy the additional force doesn't speed up the dulling process like it would with HSS, it just ends up cutting better. Maybe the really high end carbide tools have a better edge, but those are usually out of my price range. I hit mine with a fine grit diamond wheel if possible right out of the box and less aggressive feed rates work a lot better, but they're still just a bit more susceptible to chatter than HSS is. Could be due to a more rigid tool and harmonics, I don't really know to be honest. The slop in a cheap machine plays a big part in that, so unless I need carbide, HSS does most of the cutting in my shop. It's also pretty handy because I can forge, shape, and sharpen HSS to whatever kind of cutting tool I want...carbide is way out of my league LOL

@mackk123

2 жыл бұрын

@@Skinflaps_Meatslapper HSS will be better than cheap carbide over time. Good carbide however is unbeatable.

You were a huge part my 3d printer start back when you did alot of the delta style printers. That tevo little monster was a dream of mine lol. Glad to see your videos popping back up on my feed. Always enjoy your explanations and indepth approach for all of us who are alittle slow or new to this type of hobby. Makes you feel confident about taking on the next challenge. Awesome video as always

Your videos are so underrated! Love your videos and honest opinion!

Thank you comments. You saved me 50 minutes. I now know that this doesn't actually show me HOW to cut metal on CNC.

Thank you for making such thorough videos consistently

You had me at "parts for your pew pew"

@jamesgellert1263

3 жыл бұрын

LOL I know right, you know pew pew nothing suspicious going on here.

@smorrow

3 жыл бұрын

Probably obfuscation due to KZread-algorithm paternalism

@CBRpaul

2 жыл бұрын

Same lol

I'm used to larger, corded routers kzread.infoUgkxfQ5_mgwq6PcudJvAH25t-I4D-3cTPz4z so this was a different experience for me. Basically, this is an incredibly sweet machine, fits well in the hand, etc. It has slightly less power than I'm used to, but that's understandable. Maneuvering freehand takes some practice. These days, it's especially nice to be able to avoid power cords. This is above the level of a hobbyist but below a pro level.

This is a fantastic video. I've been playing with a dirt cheap 3018 for over a year which has taught me a lot but I learned loads more from this vid. I will just note that the title should have been "Proving That It Is Impossible To CNC Cut Metal For Under $400".

3 years later this video is fantastic. Thank you for documenting the effort and failure. Tired of seeing videos where in 20mins everything works and the hard work is skipped.

Thanks for continuing to do videos, I do much prefer your channel, than that other guys.... Keep it up.

I'm currently in the same situation, I have a Shapeoko 2 with lots of upgrades and I've finally taken the leap to cutting aluminum, with the hopes of making parts to make it cut aluminum well. First, you're absolutely correct that speeds and feeds matter. I'm currently cutting 0.6-0.7 mil per tooth that seems to be a sweet spot for my machine, using either 2 or 3 flute end mills. Second, I found that performance definitely improves with the right surface speed. That depends on RPM and bit diameter, but carbide really likes it fast: 800+ s.f.m. Third, Fusion 360 is free for hobbyists and can produce the trochoidal mill path you describe. It's much easier to clear the chips when you cut a wider slot this way. Unfortunately, trying to cut 0.7mil per tooth is useless if the backlash is 4mil and spindle is chattering all over the place. You end up with some teeth cutting nothing and others cutting 5 mil. On my machine I've got the backlash pretty small, but I believe the current limitation is overall machine stiffness, the opposite of the problem you have.

I really appreciate the effort you put into this video. I feel like a got a year's worth of experience in less than an hour.

I think the frame of this little machine is probably stiff enough to handle alu. Upgrading the motor is a good step, but now other factors come into play and they are all compouding factors. The mill bit really wants much higher RPMs. The mill bit is probably not of the best quality. The lead screw has too much backlash and the anti-backlash nut solution does not take away the backlash with the forces involved. The linear bearings are probably cheap ones with too much play. And after all those issues are fixed you might even find that the steppers do not have enough torque.

@AdaptivePhenix

3 жыл бұрын

Well, that saved me a bunch of typing 👍😁 Too much work but profiled linear rails, ballscrews and ditch the Mickey Mouse steppers; get closed loop servo motors on there. That cantilever bothered me from the get-go.

@Q5Grafx

3 жыл бұрын

i went to 92 oz in steppers, 500 watt spindle shitcanned all the plastic parts and upgraded to aluminum replacements. started using Yonico and Amana bits and feel confident on any wood or plastics jobs but im not going to destroy the little machine on trying to cut aluminum. i also converted the motors to hybrid closed loop steppers and then went through every wire and replaced them with all sheilded jacketed cables because the RF interference was causing lost steps.

Thank you so much for making a very thorough honest effort exploring the best of cheap cnc machines, very helpful in my search for fabbing my own alum parts.👍👍

Thank you for scouting ahead on the path. As someone who hopes to follow, you have my gratitude.

One of the most real world reviews I've seen, thanks.

38:21 They usually oversize the fan so that it is more effective at cooling the motor with the air flowing over the top and cascading down the sides. When you make the fan the same size as the motor it causes the fan to dead end right into the top of the motor and won't have the same air flow down the sides.

I have been considering buying a cnc router and I found your video most informative. Thank you for all the work you put into this. In the world of hobby machining we use WD40 as a lubricant when machining aluminium. It eliminates the galling which blocks the cutter leading to all those broken end mills.

Thank you for everything you do! Helped me start printing

When I started out I was naive enough to think I could build a large gantry style mill mostly from scratch. I ran into almost all the same problems as you. It was a very humbling project but I learned a TON.

@jeffbeck6501

3 жыл бұрын

I think it is possible. I built a large CNC machine out of 4040 and it is just like too much of everything. It has big Nema 34 motors and I am a Nema 17 type of person.

@RivalMachining

3 жыл бұрын

@@jeffbeck6501 I agree that it's possible, I know I greatly under estimated the cutting forces the frame and motors have to resist.

Your upper left and liwer right quadrants are swapped from industry standard. IOW :"X" is always called first in a geometric expression, "Y" is always called second, "Z" is therefore third, etc.. And a good reason to set your work station coordinates in the middle of a part is when you are working on a part that is round and you're doing work in the center of the round feature, as in cutting a tapered pipe thread (inside or ourside) into the feature. Another good reason would be that your blueprint establishes the origin at a feature well onto the part. Say, in a program meant to cut a block plate for the bellhousing mounting surface of an engine. Those are almost always given an origin at the center of the engine's crankshaft.

@DesignPrototypeTest

3 жыл бұрын

My dyslexia kicked in and I reversed those two quadrants. Woops! My bad. Hopefully a million people don't see this video too. :)

@timmer9lives

3 жыл бұрын

Yes, that’s what I was wondering. It just kind of seemed different from what I’ve been seeing and doing on my lathe and mill. Anyway I loved your video and would love to see you try to cut using a coolant like WD-40!!

@clintharames7280

3 жыл бұрын

No wonder you like working in the +,+ quadrant :)

@KatTrue

3 жыл бұрын

I was wondering if anyone else caught that. I ran that section of the video three times to endure I hadn't misunderstood and that the horizontal line was the x axis.

@johanbraanen2108

2 жыл бұрын

Thought the video was mirrored or something

I bought a 4180 machine of similar quality and even added the same 500 watt spindle . It's fine for wood or plastic but yeah for aluminum it's a struggle . I saw a fellow who said the run out in the spindle was bad because there is a rubber bushing around the drive shaft bearing to cut motor vibration but of course it causes runout as the shaft can bend inside the rubber bushing! He was a machinist and replaced the rubber bushing with brass bushing he made on his lathe. Thanks for the great explanation of hardware and software for milling , cad and cam too. ☺

A channel named "Awesome CNC Freak" recently made a vid on how to upgrade this machine. He decreased the backlash, the chatter, and even milled steel. They look like low cost improvements; he used the original motor but added pulleys and a better spindle. I'm super tempted to try.

I await the upgraded version with a duet board, sensorless homing and a part cooling duct 😛

I learned sooooo much watching this. You have saved me a lot of money and time experimenting.

You needed linear rails supported every 50mm instead of round shafts supported say 300mm apart at the guide ends, ball screws to drive the slides, and a stiff spindle shaft supported nearer to the Z slide base. But that, as you concluded, is a whole new more expensive CNC router ! I recently bought an all metal, linear rail, ball screw, Anolex 3030 EVO Pro ($660) built like a tank, emphasizing increased rigidity and low backlash, for these same reasons. It cuts Aluminum well, at moderately high spindle speeds and feed rates. I have just upgraded to the Anolex 1.2kw VFD spindle to replace the stock spindle; man it is hefty !

Few points of interest here: 1) The terms most often used is Backlash, or play, in 22 years, I've never heard anyone simply abbreviate it to "lash" 2) judging from what's shown at @00:07:00 that anti-backlash nut is installed completely incorrectly. The spring is NOT supposed to be compressed that hard, nor is it supposed to be compressed against the frame, the way you "fixed" it completely negates it's use. The way these devices work, is they put tension between the nut, the follower, this ensures the nut is always engaged with the threads of the lead screw This image displays the proper installation of a spring loaded anti-backlash nut: images-na.ssl-images-amazon.com/images/I/71xI4rTFy4L.jpg 3) At the scale you're talking about, rigidity issues on the "cheap" versions has very little to do with the frame, and more to do with the hardened guide rods, and the fact that on the machine you're reviewing ,they are offset, and the machines you pointed out, they are in line. This will lead to "nod" and tram errors int he cheaper machines as they plunge into work, and chatter as they move through the work. However, again, with the scale of these machines, you shouldn't be putting sufficient cutting forces with any of them to bend rods, you're not working with VMC's, so trying to rooster tail 4041 with this isn't going to happen anyway. Feeds and speeds are where most of your issues are going to come into play. (yes, 12mm hardened rods will be stiffer) 4) Moment of inertia calculations: Wow.. talk about going a long way for literally no reason... Yes, the MoI for 8mm rods is 201, and 1017 for 12mm rods.. However, these numbers actually don't tell us anything practical about the rods, their material, their hardness, bending forces required, or how they relate to the application they are used here. That's like telling someone the tensile strength of nylon when talking about a wire brush.. If you're supplying enough force into the work with your cutter, that you're bending, or displacing the rods (2 hardened rods, and the lead screw) then you're obviously over-loading the machine, and operating it unsafely. again.. you're going out of spec for these machines to try to prove a point, that literally, doesn't need to be proven. yes.. 12mm rods, and a thicker gantry cross member will be more rigid, 100% accurate.. literally all you had to say... once.. 5) False equivalencies abound. You point out that the connections between two parts are not equally rigid.. um.. ok.. of coarse they aren't going to be equal, they are 1) different connection planes, 2) different connection points, 3) different components, 4) different profiles... To assume they would be the same is illogical at best... Anyone, can simply take a look, and see they are different in every aspect except for perhaps, the fasteners used.. .on one machine, you have a piece of extrusion, supported with two right-angle blocks, that are clamped onto the extrusion, and the frame (total of 4 connection points, on 4 faces) and on the other, you have 6 connection points, all on the same face... Of coarse they are different, they are different designs.. Also, comparing 10mm thick solid aluminum plate to extruded aluminum..... really... The plate will be less likely to tilt as you've described than the extruded aluminum, mainly due to the way they are clamped, and the fact that solid aluminum vs a hollow extrusion.. that 10mm of extra wideness on the extrusion probably isn't going to compensate as well as you might think. However, that being said, if you're putting enough lateral forces on either machine, you're not operating your machine safely, or properly. 6) It's not an "axel" it's a spindle. An axel is for wheels, regardless if it spins or not.. a spindle is any rod which spins within a mechanism. yea.. i'm not going to go any further into this review.. sorry my guy, but it appears you're trying to look like you know what doing, but there are a myriad of technical issues here, everything from terminology, to mechanical assembly, to the way you describe things shows this isn't something you're very knowledgeable about.

@knobjelly

3 жыл бұрын

I think the video is aimed at the home hobbyist, not the anal retentivest.

@martinrcflyer4089

3 жыл бұрын

I read and enjoyed your retort. What you say is true, but unfair, especially as you criticise for being verbose, with probably the most verbose comment on this page. Lol Of course, it’s important to be accurate in what you say and write, even the spelling of “of course”. However, everyone has their own style (including me and you), but I think it’s best to accept that styles are often imperfect in their entertainment and education. The one big takeaway from this video for me was his educational value in failure, which he provided abundantly.

This is super useful, thanks for posting this!

Thank you for explaining things in a way that most don't care to

We are looking forward to watching the deep review of the CNC 4040-XE.

@DONEWR1TE

3 жыл бұрын

I want onee! May order soon. I want to know the capabilities. I’m a tool and die maker and I want something to play with at home!!!

Great video! What CNC machine would you recommend for drilling holes in small, metal, enclosures?

Props for pulling out the moment of inertia calculation... I would just have said "ya... it's thicker... therefor stronger :P"

@DaveSmith-cp5kj

2 жыл бұрын

Smol things weak big thing strong oh ah ah! My caveman mind as well.

No way! I was looking how to get into CNC just yesterday. Great video! Thanks!

Thanks for posting your video on the Creality 3D print mill. It's officially my first step into the 3D print world.

To avoid aluminium sticking to the bit you need to take larger chips. The heat caused by the cut will be ejected with the chip, limiting heat buildup in the stock. Ideally you need a faster feedrate, but you may have to try a slower spindle RPM if faster moves are out of the question. Also compressed air to blow away the chips will be helpful.

@AtimatikArmy

2 жыл бұрын

How come no one has suggested using coated end mills. Even the cheap titanium coatings would be helpful here but there are many more advanced coatings which are all designed mostly for this specific issue. Your comment regarding chip loading absolutely applies as well.

Would love to see what you think of the Path workbench in FreeCAD 0.19 and to see if you can get it to make chips

Thanks for the heads up. I would have purchased this since it look solid on the surface.

Thank you for such an excellently constructed and presented video - not just a great review of the machine, but a great source of information for anyone thinking of doing amateur CNC machining. I've been eager to get into this, but can't afford it. I keep being tempted by the cheap machines, and other reviews have highlighted things like rigidity and more powerful spindle motors etc, but your video covers the WHY and the real effects on the work - It would be so easy to think "get the machine, do a few upgrades, and you get fantastic precision and performance" - clearly it's not the case. There are certainly some things where quality of output critically depends on the quality of tools used, both mechanical components and software. Thanks for a fantastic video. I'm subscribing so that I'll spot your review of that larger machine.

As a machinist I work from a center all the time! There are many benefits that I didn’t notice starting out, especially if the part has symmetrical features. For me its easier to visualize one side as positive and the other side as negative in the same direction. As opposed to having it just look like random numbers in the G code. But if the part has a feature like a hole or a bore I like to indicated and set the origin to the center of that!

Hi I know this video is a year old or so but I just wanted to drop some suggestions from a CNC programmer. as far as your bits collecting aluminum in the pores of the carbide soak the bits in hydrochloric acid overnight and that should takeoff any aluminum that’s residually on them it works better than lie. also instead of air they sell cheap mist cooling systems that use air and a water soluble coolant to cool the tool and clear the chips away they don’t make much of a mess and give you a tremendously better finish , cut speed and tool life. Also consider some three Flute mills I’ve noticed they cut down on chatter due to the fact that there is always a flute in contact with the work and the pressure never really comes off of the bit in a cut as it does with even number flute end mills. Anyway I hope someone get some thing out of my comments great video and very informative thank you!

Very informative Video! Thank you for making it.

Great video and love how you explain and teach. Thank you

You're absolutely right! I'm totally going to rezero my MR-1 with the positive all available, although obviously the z axis will still go negative, but I think I will like it much better also.

Great video ...honest details ...thanks a lot

Just curious, but how would this work on wood instead of metal? I'd like it to cut weird dovetail or box joints in wood up to 3/4". Seems like a reasonable price for that (and yes, I know a jig would be much cheaper, but not as geeky). Tx

Great video, learned a lot!

Thank you. You just saved me a lot of time, money and frustration on buying or DIYing such kind of machine. It turns out that for my needs it's cheaper and better quality just to order required parts (tested with 3d print) in some kind of CNC cutting workshop.

incredibly thorough, thank you

Informative video. Knowing the limitations of the machine, wouldn't you drill a starter hole, zero that, go at a higher spindle rpm and if you couldn't nibble just reduce the feed speed?

"That's a thick member" "That's what she said"

Great detailed video. One suggestion. It is not just about rigidity it is about dampening vinration too. There is no enough material in z axis to damp vibration. You will need a aluminium plate to hold spindle clamp. It will improve performance 200%, there won't be chatter and cleaner cut.

just found your channel, thanks for this content love it

That part where you used a frequency generator to "tune" the motor speed was 👌 That's awesome

@DesignPrototypeTest

5 ай бұрын

Thanks for the recognition man. I hope you have yourself a wonderful day.

I learned a lot watching your video. Thank you so much! Subscribing now.

All very interesting. Thank you for your time, much appreciated

I don't even do any of this stuff and I found this fascinating.

Great video, very well done.

I so wanted you to succeed with this cnc mill, as it is exacly what I was looking for. I totally follow you in your conclusion as it ends up in to many upgrades and compromizes for something that is still not satisfactory. Greetings from Copenhagen Denmark

A few tips: keep your cutter as short as possible. Use cutting fluid. Use the lowest RPM that will cut effectively. Keep your feed rates as high as possible. Climb cut whenever possible for better finishes, except when you have lots of backlash in your axes. Make starting holes with a drill bit before plunging with a mill bit. (two setups, though). Rigidity is the most important thing for clean cutting.

Great video, thanks! Yeah, I wouldn't play with the little cnc machine as much as the new larger model.

Creative video, thanks for sharing :)

When I work on projects that require accuracy (pretty much everything), I work off centers to be sure that my parts are balanced. Using all the Cartesian coordinates enables ease of symmetry for parts or structures based on center. Using all positive x,y coordinates will make symmetrical layout a bit more difficult. For example, if you are cutting brackets that require holes equidistant from center all you have to use are identical integers for distance and assign positive / negative values in either x and y or both. Anything you create that is radially balanced on center would be a bit more difficult using all positive coordinates. In the end what works for you is what works, so I do understand that when things are confusing, using a method that enables you to move on and be productive is most important. Thanks for the video.

There is a very similar machine with a slightly different design that would have made upgrading the spindle easy. The 1419 version of this with non moving bed. That would be able to use the aluminum bracket with the spindle out of the box for that one or even the 800w 20k rpm spindle with no cutting needing to take place for a new mount. Obviously most of the rest of the machine is the same but do you think the faster RPMs and aluminum mount would make it closer to doable? (with a dust shoe as well to not have the chips fall into the lead screws and also help prevent the clogging you were having).

I'm looking for a CNC to just engrave 8mm text on to a mild steel tag, I'm not worried about speed. Do you think this can do it or can you recommend a budget machine that can?

Do you think it can engrave steel? I’m trying to engrave lettering on the back of my DIY watches I sell since they look bland without it. I just need to engrave very small letterings that are fairly superficial not at all shallow

WD40 to reduce prevent that aluminum from adhering to the carbide.

This is why i go on with my slow EDM = Electrical Discharge Machining ... no forces at all in XYZ. May the force be with you !

@butsukete1806

3 жыл бұрын

Where do you get one for under $1000?

you made my day showing the moment of inertia.

Thanks for posting this, I found it very helpful, especially your run down on the software workflow. Just starting out and I hoped to find a machine and set of software tools where I could eventually run CNC, Laser Cutter, Waterjet, engraving and 3D print machines all using the same software set - In other words without having to learn a separate set of software for each type of shaping tool - maybe that is not possible now that I see how complex just the 3 axis CNC alone can be thanks to your explanation. I thought the benchtop form factor of that red machine has it's advantages if one is just trying to learn the software. Perhaps just to machine wax or delrin so a newbie could get going up the learning curve without a big investment.

Hey man, what a great video packed full with quality information. Maybe you said it and I missed it, but did you use conventional or climb milling? Or both? The difference in outer dimensions vs. inner dimensions at around 41:40 could be explained by the mixed use of both milling types. I'm sure you know this already but climb tends to push the bit away from the material whereas conventional tends to pull the bit into the material. Also spring passes (100% overlap with the previous toolpath) could be used to get better dimensionality. At 43:14 you mention the problem you're having with chatter. In my experience with a similarly built cnc, it helps to experiment with different (scary low in my case but that of course depends on the machine) spindle speeds until you find a speed where the frequency of chip creation doesn't positively interfere with any of the machine's resonance frequencies. But that quickly becomes a shitshow ;). As for the optimal (literature) feeds and speeds: I tried them and they didn't work. My gut feeling is that those work on tormachs that actually have the required rigidity for those settings but they are incompatible with hobbyist-machines. To the cooling: I tried compressed air, but the airflow required to cool my parts was so high that it would bend the bit/shaft/motor-mount which would create even more heat and chatter. I had good luck with isopropanol as a cooling agent because it evaporates really fast and doesn't leave a mess. And about the adaptive clearing toolpaths: With a small workaround you can get Fusion360 to do those perfectly fine. Even with the free version afaik, but I understand that Fusion isn't as cool as it used to be due to their new pricing model. The last thing you shouldn't forget about is that aluminium is terrible at absorbing vibrations. It's light and stiff which is great because it will make the machine light and stiff ;) But at what cost? Professional machines are made mainly out of cast iron in part because of its dampening characteristics. In this case I think dampening the frame by different means might be an option. The easiest idea would be to print 0.5 to 1mm spacers out of petg which also has great dampening characteristics and put them in between each of the aluminium-aluminium joints on the machine. For that same reason, I think that those cnc machines like the foxalien or the shapeokos with openbuilds-styled delrin or nylon rollers are a great compromise because of the dampening characteristics of those rollers.

@Q5Grafx

3 жыл бұрын

some of the larger hobby machines are definitely capable of cutting aluminum but you really want at bare minimum 1.5 kw spindle, 4-600 oz in steppers and a machine using cast parts and not extruded parts. cast iron is better than cast aluminum. but then youre talking a minimum of 2-3000 dollars for a machine like that. im building a gecko g540 machine using a completed chinese machine with cast iron parts and gutting it of all crap electronics and shitty wiring. but people hear CHEAP and they think wow i can do all that for $500 and its just a lie. I have over a thousand into my what started out as a 3018 that cost $300 and its capable of cutting wood great but wouldnt attempt it on any metal and the size is just too small for practicality.

I am an everlasting font of optimism. I keep watching, hoping it will get better.

Feeds and speeds also assume a rigid machine with a motor that will not stall at the proper RPM. You've discovered most of this already though. I've seen a guy make successful cuts on a cheap machine, BUT it was a heavily modified machine. Adding extra rigidity to the spindle, using coolant, changing to a high power motor with a VFD, and changing to ballscrews. All of that in a machine a bit larger than what you are using there. Also being able to hold 0.0005" tolerances. But we are talking about a complete redesign of the machine. You might have gotten a tad farther with this machine and got slightly better results but I think it would have taken more money.

Have any you think would be decent to cut aluminum uppers and lowers for relatively cheap with minor upgrades to maybe the spindle or something.

Thanks for the exhaustive review of this product. I know you decided to yeet this machine but did you try a ball end mill? I've managed to do some very basic alloy cutting on my (almost - it has z-touch) unmodified 3018 using ball end mills. 0.1mm cut depth but good enough to produce some alloy logos for my mate. I tried end-mill cutters in the 3018 and just broke them. The ball ends however worked ok.

If you get a little tub of "MIG Dip" from a welding store, and dip your cutters into the compound, it helps prevent the aluminum from sticking to the cutter, it helps to heat the cutters to 110° or so to liquefy the dip compound

Thanks for posted this. I wont buy one lol. I started watching this thinking I could give this $400 setup a shot. Not many people post perceived 'failures' but it's probably saved a lot of people some money and head to desk banging.

Could you 3d print some splash guards or covers for the electronics and steppers and run a mist coolant?

Great video!

Hi. I like your video. You covered all the important factors. But I can’t find reference to who makes this kit or where to purchase one. Can you share? Thanks, Paul

What would you recommend as the best desktop CNC machine something with a 10x10 radius 5 axes with coolant

how long did a small piece like that bottle opener take to make? and the square with holes in it?

I could see (0,0) being a useful center of my piece when its going to be a round geometry, because then I could make the measures for one cuadrant, and then adding negative signs to the X or the Y or both would turn those into Cuadrant 2 - 4 coordinates. At least that's my believe coming from someone who's not done any CnCing.

@gweighin

2 жыл бұрын

Moving (0,0) to center of the x-axis, and keep y-axis at the edge of the bed, makes it easier to design bisymstrical models, by changing the X coordinates , to -X coordinates. Place (0,0) at the center of the bed, and do the above to both X and Y, to make quadsymetrical objects super easy.

great video, cant wait to see some metal work on the $1000 machine, perhaps some fine stainless machining :)

very good explanation.

Good info 👍 good job done👍 you are awesome, and Thanks for sharing 💕

The Path workbench on Freecad has the adaptive clearing feature you were missing in this video. I'm not sure if they had it already when this was filmed, but at least they have it now :) Ever tried it? Great Video by the way. I learned a lot listening to your comments throughout the video!

@paulathomas4944

2 жыл бұрын

Adaptive tool paths were available in FreeCAD 18 so I think they should have been available when this video was filmed. The only slight gotcha would be that adaptive profiling and tabs don't seem to play together nicely in FreeCAD (applying tabs to an adaptive profile seems to send FreeCAD into an infinite loop when I try it). The work-around would be to use adaptive to get most of the way down then do the last bit, with the tabs, using a normal profiling operation. I do agree with you that it's a great video and I'm sure many people will have found it useful.

Aluminum is hard to work with. I think you are using a bad alloy. It smears so much. Also you should be using a coolant. Then again you need the right tools to machine alumium. And at the end of the day, the right speed of rotation and the right feed. There are tables that recommend all these settings. I think it is not the machine that caused the problems, but primarily the material that was being used. Greetings from Germany!.

@DesignPrototypeTest

3 жыл бұрын

Great point!

@chengkongleong1337

3 жыл бұрын

@@DesignPrototypeTest Flood coolant is impossible for this setup. Use WD-40. It is a perfect cheapo coolant/lubricant to prevent gummy material like aluminum from sticking to your cutter, which eventually cause your tool to fail. Works very well for me. It works for plastics too, preventing heated chips from binding to itself to form a big blob.

@Dragon-Slay3r

Жыл бұрын

Use a spoon

@Basement_CNC

8 ай бұрын

​​@@DesignPrototypeTestwho would have thought that if you have 0 idea of machining it doesn't work out first try 😂 and yeah there is a steep learning curve about 40% of this vid is bs single flutes are superior on small machines dump the rhino stuff and use fusion like everyone else and suprise suprise a 400$ mill doesnt perform like a professional one 1310 mills do work, with knolege and limitations, dont make sawdust, make chips and so much more

@TlD-dg6ug

6 ай бұрын

Aluminum is hard to work with? No son, you just don't know what you are doing. Aluminum is easy as fuck. Try inconel, titanium, or any high nickel alloys. Lmao. Aluminum is hard, that's the easiest metal besides brass 😂

I have the FoxAlien vasto. It’s a great machine for aluminum so far. Ball type Leadscrews all around. Motor couplings for easy upgrading. Heavy duty Dual linear carriages with rails for extra rigidity. 3 different sizes spindle holders.

Excellent video. The most important take away is the slop in the rod bearings.

What 3D software did you used to model the fan?

Is there any way to run the machine upside down to rid yourself of the chips?

Excelent video thanks!

Matt, I have looked a bit at the issue and for machining soft aluminum, you need at least 800W spindle or bigger with water-cooling for a proper control of the minimum rotation speed and cut speed. Your video has many pertinent points, you have learnt a lot from this experience. Keep the good work.

Title: *How To CNC Cut Metal For Under $400* Video: *It’s impossible to CNC cut metal for $400.*

@xhorntail

3 жыл бұрын

For real! Every time I try and give this guy another chance, he does this kind of stuff again.. I'm going to just block him from my search and feed at this point.

@sevdev9844

3 жыл бұрын

Actually, he didn't talk about the thickness that works and at which point it breaks.

@bruno3

3 жыл бұрын

And why did he keep saying how sturdier this version was compared to the previous one... if he then ended up printing a holder for the spindle out of PLA? Why are we even speaking of sturdiness, making a bunch of changes, if you then use a holder made of soft plastic? Are we kidding?

@brahtrumpwonbigly7309

3 жыл бұрын

@@xhorntail would you prefer he lie to you? You don't want to know the truth, and I hate clickbait as much as the next guy, but you wouldn't have listened if he'd titled it "you cannot cut metal for under 400".

@krumzakon633

3 жыл бұрын

@@brahtrumpwonbigly7309 this and other machines CAN cut but not for pro jobs where precision is a must. He printed the holder, because of the new motor. I have news for you, the other one for 1K is also no good too. Must go up in quality, sturdiness, etc. meening >$

Hi Matt (is that your name), Bam, I subscribed. Great video. It shows the value of failure for education, which you make entertaining too. If you agree (that failure is important for success), then I’d ask you to carry on with this project and not give up altogether. Instead, learn from the failures, take on some of the points made in these comments above, about topics such as metallurgy, coolants, etc and continue to explore what’s needed to get this machine to do the job. You’re far from finished with it - I hope. Looking forward to an update later this year 😄

Like you said, you need the lighter cuts at faster feeds. You won’t get the friction welding if you are feeding fast enough to move away from the old material before it gets hot enough to melt Also, why not use fusion 360 CAM?