Building a (modified) Mostly Printed CNC (MPCNC) Part 3

[@shas4501]

When will you be posting more videos?

[@AmauryJacquot]

now that you can cut aluminium, would you consider replacing certain printed parts with milled ones ?

[@primecouncil6475]

that would be a great improvement of stiffness but i guess that's how it'll loose the point of project -see how far a well constructed printed cnc can push..

[@AmauryJacquot]

@@primecouncil6475 consider the 3d printed version bootstrapping

[@amrfwws]

This enclosure are really inspiring me to build it for both my CR 10 max and my future mpcnc. Thanks for share everything!

[@jimmynoname4089]

Huh, the designer didn’t threaten to sue for changing the design?!

[@djVania08]

How is the CNC holding up?

[@haenselundgretel654]

Deine Videos sind die bisher besten über die MPCNC und selbstgebaute CNCs an sich! Vielen vielen Dank dafür! Du hast mir beim Design meiner Eigenen sehr weit geholfen, indem du die wichtigsten Punkte der MPCNC angesprochen hast.

[@j.hankinson7803]

Thanks for posting. Very informative videos. I have an MPCNC and enjoy it. All good fun.

[@sierraecho884]

Alles okay bei dir ? Du hast schon lange keine Videos gemacht.

[@TonyStark-er8vu]

hello brushes before bearings you have references to models?

[@phatpizza610]

I initially looked at this but after thomas sanladerers experience I went with the rs-cnc32, seems to be more rigid and I’m just about to post my 1st design to thingiverse for a dust shoe that is fixed on the z axis like that for a shapeoko

[@nighthawk2k3rsx]

PhatPizza It’s a shame that Thomas’s experience has influenced people away from the MPCNC. He didn’t follow instructions, didn’t do even a basic level of troubleshooting, and didn’t respect the license that he agreed to. Then complained like a petulant little child that nothing worked. I lost all respect for his technical opinion that day.

[@ProofBenny]

Adam S well said

[@tonyrichmond9428]

@@nighthawk2k3rsx Haven't watched a video since. Maybe his content still has value for some, but if we are that far apart on the MPCNC, how much will I agree with him on ANYTHING? I can't personally say I don't respect his technical opinion, but I'm pretty sure I don't trust it to be relevant to me.

[@slickm7]

@@tonyrichmond9428 he does a lot of great 3d printing videos. he did make mistakes with the mpcnc but we all do. he got frustrated and said things he shouldn't have. overall tho he seems like a good guy and wasn't even that bad in his video iirc

[@slickm7]

went back and rewatched the vid and they both seemed pretty civil. his pinned comment is about how he misunderstood Ryan and how he wishes him the best. I get being frustrated about the licensing from him when he is just trying to put something cool out in the wild and I get Ryan protecting his stuff when it is his livelyhood. they both have valid points and I wouldn't right either off.

[@milithemuffin4534]

First i have to say I'm impressed how well it cuts given how light it is. Have you considered regrinding (or having it ground) the spindle taper? 0.02mm might not seem like much but compared to your feed per tooth it is. Have you tried measuring vibrations on different parts of the machine? At what frequencies do they occour? Also about stepper motors, without encoder they don't really have any torque untill the shaft is deflected from requested position. As far as i know microstepping doesn't really affect it that much. It just changes your expectations. Deflecting the shaft by 1/16th step is much easier than deflecting 1/4th of a step regardless of microstepping used.

[@leonbrauns]

Thanks for the good feedback. I though about regrinding, but considering how well it cuts aluminum even with that runout I think I am going to postpone it till I have to do some other maintenance like changing the bearings. There are several acceleration sensors in my drawer that just wait to be mounted onto the MPCNC ;) Yea, according to my dial indicator the movement is accurate to 10-20micron, which is equal to 1/8 - 1/4 microstepping. However I always saw microstepping as a way to make the movement smoother. (The current with 1/16 is close to a sinewave while with full steps it is a square wave). However these TMC drivers allow 1/4 with 1/256 interpolation, which should combine the advantages of both. I am going to try that, thanks.

[@gizmobowen]

Very nice update. I especially like the electronics enclosure. I have been having trouble with my Raspberry PI on my 3D printer. It is mounted near the printer control board. You mentioned that adding the chokes cut down on problems that you were having. Is there anything special about the units you used and besides the wires to the stepper motors, are there any other wires that you would add these to?

[@leonbrauns]

There’s nothing special, just regular clip on ferrites. Additionally you could also twist the wires of each phase of the stepper motors to further prevent any interference.

[@UliMack-k4s]

Hi! Your modifications are great! Do you still have the file for the Tube Holder angle (for The Minimal Quantity Lubrication) at the back of your centerpiece?

[@msdesignru]

Awesome enclosure design, I like it!

[@markus7660]

How did you connect UART to your ramps board? Mine came with preinstalled resistor at UART pins underneath. (2208 with ramps 1.5) do I need to add another resistor to the TX/RX pin? Or could I just use the RX pin as I already got a resistor added by the manufacturer (bigtreetech) thanks a lot

[@markus7660]

Do you use normal arduino mega or ARM 32bit mega ? Because I use ramps 1.5 + mega with TMC 2208 UART and it gives me TMC CONNECTION ERROR - can’t figure out how to connect them via UART for almost 2 months now

[@leonbrauns]

Normal arduino, this guide worked for me: kzbin.info/www/bejne/on-2Z5KZjbOBldE

[@markus7660]

Brauns CNC thank you

[@markus7660]

Brauns CNC thanks, I tried following his steps, but he is using fresh version of marlin. Did you use fresh marlin too? Or ryan’s github preconfigured versions? (If so which one please) Many thanks!

[@leonbrauns]

I am using the preconfigured version for Ramps with dual endstops. Setting up the TMC2208 shouldn‘t differ from the stock version, at least I can‘t remember anything special.

[@tonyrichmond9428]

Another well done video! I've built one even smaller, ~12x8 inches and I'm really impressed with how well it can handle aluminum. I especially like your enclosure. Those chips are EVERYWHERE!!

[@hectororestes2752]

Hi, your project inspired me and I want to do the same. Though I just want to cut some plywood, acrylic and sheet aluminium for the time being. Any recommendations for a sub $300 USD spindle to use with this? im in south america so aliexpress would be nice.

[@facundoromero7977]

hola una consulta que medida de caño se usa

[@hikari0-p8x]

What is air pressure?

[@dhupee]

2 Questions, if you worry about chips on the rail, why you haven't install vaccum?? the second question is, why not print part PETG for highly loaded area to prevent creep like that

[@leonbrauns]

A vacuum just doesn‘t get away the chips fast enough. Especially when deep slotting aluminum an air blast is pretty much the only option. PLA is stiffer than PETG which helps to increase the rigidity.

[@Seba112PL]

Do you think that 600x600x75mm will be much less rigid than yours ? Thinking about making it a little bit bigger but i'm a little bit concerned about rigidity. It will be cutting aluminium, carbon fiber and sometimes some thin steel sheet.

[@amilshabo3218]

Thanks for the videos , they are perfect..really . Since I was following the design and its improvments , you have used 15mm belt to avoid stretching problem and we saw this in earlier videos but in this one I see that the pulley's width on the motor looks bigger (wider) than the belt driving on it , have you changed it back to 6mm belt ? and if so then why?

[@sallerc]

He explains why he changed from double 15mm belt and is now using 9mm belt @ 6:57

[@yohabi]

Good work! I had a bad experience with GX16 connectors on my stepper wire lines (bad contact spoiled many details on my CNC table). And because of MPCNC rigidity i wouldn't call it milling machine, it's better to call it router/plotter and so on. BTW, what about to make a table with a little slope to get chips in a one place, and to drop chips in container? I think plex is not good for wooden chips because of static electricity, that get chips on plex

[@leonbrauns]

Thanks for the feedback. So far I have only referred to the MPCNC as a router, haven't I? I think one would need quite a steep slope to overcome the friction between the chips and table and also remove all the places where they could get stuck. Not really worth the effort in my opinion. I am not doing lots of wood but you're right, static electricity is a problem. But it can be solved with compressed air ;)(thanks to the wheels I can push the CNC outside for that) .

[@TheDIMONART]

Hi!! Are you alive?!!

[@enginsula4649]

How much does it cost?

[@intelligenceservices]

looking up "rack and pinion CNC" now...

[@jm5143]

Hello, I’ve a big Triton router 2.2 hp and my question is : do you think it’s possible to build a CNC for such a big machine ? What will be the practical issues for such a big project ? Do you think that cutting aluminum is an option with this build ? Thank you for any info and directions !… My Best.

[@leonbrauns]

I don’t have any experience with such a big router and while it may work, it certainly comes with some disadvantages. I wouldn‘t recommend it.

[@DJCow54]

I looked to adapt a big engine on the MPCNC and it is not obvious, because of the weight ... The structure is good but not at all to support large powers ... But do like Brauns CNC, machining aluminum parts is possible with a normal version and then making, for example, a new CNC accepting large constraints.

[@angel1138thx]

An amazing project without a doubt thanks for sharing it

[@simonresch9677]

Very nice Video! Wich tolerancs can you get with your machine?

[@leonbrauns]

It heavily depends on the material and size of the parts. By leaving some extra stock and slowly getting closer to final dimensions while measuring after each pass it's possible to achieve

[@simonresch9677]

@@leonbrauns ok that sounds very good

[@KS_ChemEng]

These cuts are incredibly impressive! I would love to know if you have had any success cutting steel plate or flat bar (3mm or greater) and what you have done which really makes your MPCNC stiff, (other than what was covered in the other videos)? I have constantly struggled with the stiffness in the z-axis in my MPCNC.

[@leonbrauns]

Here is a very early video of this machine cutting 4mm thick steel: kzbin.info/www/bejne/mGjWiHaqgJeKnq8 There is nothing that I haven’t shown in the videos that could make any significant difference to a common MPCNC.

[@KS_ChemEng]

@@leonbrauns ooh! I must have missed that video. Thank you for your reply. your videos have been really helpful in troubleshooting my MPCNC. (like why the Arduino kept randomly crashing) Keep up the amazing work!

[@hunterpruett5455]

Awesome work. Also, what mods would you consider essential in order to cut aluminum as you do?

[@leonbrauns]

I think the spindle is most important. Using the right end mill probably comes second. I don’t think my modifications play a big role for cutting performance.

[@hunterpruett5455]

Brauns CNC Thanks, noted

[@hunterpruett5455]

@@leonbrauns One more question, do you have any cheaper spindles that can still haul aluminum like yours for a cheaper price and possibly 120V? I've seen the Dewalt 660 cut through aluminum pretty good but you have lots of experience with this stuff.

[@leonbrauns]

I have no experience with other spindles, but the 660 is probably a good choice. Just stay away from those cheap chinese 500W spindles.

[@hunterpruett5455]

Yeah I’ve heard to stay away from them. I’ve decided on the Metabo HPT router

[@EnglishTurbines]

Ball Slide Rails....with wipers, end of swarf problem....More accurate too, more expensive yes. So is constant cleaning of those tubes and bearings...I would not have used those tubes and carriages...IMO.

[@abc123wroclaw]

Some of your mods are nice. Thanks for sharing! It's just... I couldn't help myself form wondering why have you made your CNC out of plastic, but a cover of nice aluminium profiles? Should it be opposite?

[@sallerc]

Great work! Can you control the spindle speed from gcode on this setup? If so, was it straight forward using the RAMPS board, or did you have to do some special solution to get it working?

[@leonbrauns]

Sadly I can‘t control the spindle speed, only on/off via a relay.

[@pmsilvei]

@@leonbrauns what about using a little servo motor to control the potentiometer for the router speed? After all, you have an Arduino Mega in front of you 😁 Just an idea 💡 I love your MPCNC, it made me decide to finally built my own ☺️ Thank you so much!

[@ProofBenny]

Well done sir - I am about 30 hours away from finishing all the printed parts - but due the caronavirus all my orders are still in processing and none have shipped - ordered 3 weeks ago - see how we go

[@DamianKoorstra]

how did you have configured 5 steppers on 2Y and 2X and 1 on Z?

[@leonbrauns]

There is a setting in the Marlin firmware that lets you add a secondary motor for each axis.

[@alihassan1903]

waiting for 5 axis version.

[@ProofBenny]

Wouldn’t it be amazing for someone to come up with a mpcnc 5 axis !!

[@markus7660]

Thanks for the update, that solved a lot of my questions! My other questions are, the 24V powersupply you use for the drivers is 6A ? or should I get higher / would you make a detailed electronics guide? Thanks

[@leonbrauns]

The 24V supply is 75W (~3A). I have often read that one should choose a power supply with a current rating around the sum of all the rated currents of the stepper motors (~10A in my case). However I haven‘t had any problems with mine so far. There is already a lot of information about electronics out there, I don‘t think I could add anything useful.

[@allted]

@@leonbrauns Convert everything to Watts and work from there. 20W is usually more than enough.

[@leonbrauns]

Yea, thinking a bit more about this the sum of all currents makes sense for those (often small) stepper motors which can be driven by just a transistor with a constant voltage. It isn‘t applicable for pwm stepper drivers like we use on the MPCNC. The required power should rather be calculated by PhaseVoltage*PhaseCurrent*NumberOfMotors with some safety margin.

[@richardbmw320]

Hi, thanks for the update. What design did you use for the corners, I couldn’t see them on your Thingiverse page

[@leonbrauns]

You can find the corners here: www.thingiverse.com/thing:3101774 If you want to use a single belt you have to additionally print these: www.thingiverse.com/thing:3875362

[@tgirard123]

@@leonbrauns I used those corners as well and they work so good!!!

[@carlosriccosalazar9790]

Felicidades congratulations beautiful machine did You Made

[@kielerkarl]

First of all thanks for the update! Like your content!

[@MrGurkentomate]

awesome inclosure! What did you use to hold the acrylic in place?

[@leonbrauns]

Thanks! I used some 3d printed parts that slide into the t-slots and have an opening which is slightly smaller than the acrylic, so it gets clamped. Basically the same stuff that you can buy, but it's a lot cheaper to print it.

[@PiefacePete46]

It was worth the wait! Many thanks.

[@mhgscrubadub9917]

This is beautiful

[@JeremyYoungDesign]

Great work! What compressor do you use?

[@leonbrauns]

I don‘t know the exact name but it‘s a Thomas twin-piston compressor.

[@SwapSupra]

please anyone can you answer this question? D: can i simply change the dimension from 600x275x75mm to 600x600x75mm and it would still work ? never worked with a cnc program only 3d printer but i guess the only thing that would change is the calibration process? can i juste make it the lenght i want 450x450x75 and would still work without major change? My ultimate goal would be to make a flywheel adapter like in this picture and will be balanced for sure but it would be a damn exploit to do this one a homemade cnc cdn.shopify.com/s/files/1/1923/0325/files/Photo_May_05_5_06_14_PM.jpg?v=1543187482

[@sallerc]

Yes you can make it bigger, but it will not be as rigid. There is a calculator on the v1 engineering website where you will see how much conduit/pipes etc. you need for a specific work area.

[@sallerc]

www.v1engineering.com/assembly/conduit-rails-tubes-pipes/

[@SwapSupra]

salle rc thanks ! :)

[@gama7607]

Are you selling the plans? I would like to build something similar.

[@antronk]

Look up MPCNC on Google. You'll find the creator website with all the assembly instructions. This setup is slightly modified. For that just watch this channel's series on the topic

[@gama7607]

@@antronk Thanks

[@tulindo71]

Hi. First I'd like to congratulate for your awesome work. I've seen here (www.thingiverse.com/thing:3101774) your stl files for the original 2belt version (and also the update going back to 1 belt). Some questions: 1. Is your build using metric hardware only (bolts and nuts)? 2. The 4 20x20x3 angle iron are used only in the 2 belt version right? 3. The single belt... What's the best size? Thanks again. Paolo

[@leonbrauns]

Hi Paolo 1. Yes, metric only 2. Right 3. 9mm works well but 6mm also does the job

[@tulindo71]

@@leonbrauns Thanks for your answer. Speaking again about belt sizes... The wider the better? Or size doesn't really matter (asking this because you started with double 15mm and ended with single 9mm... with 6mm one saves also bearings) Have also you considered conduit support like, just as example www.thingiverse.com/thing:2813885 ? Another question: did you ever feel the need to upgrate to a more powerful nema 23 stepper motors instead of the nema 17?

[@Px992]

Einfach nur Mega! 😎

[@trieuhanminh1992]

wow, work aluminum

[@bastelmichl4241]

👌 Leon, prima gelöst Deine Einhausung mit Nut Profilen und Acrylglas. Du hast von allen Seiten Sicht. Meinen Bau der MPCNC zeige ich gerade auch in einem Mehrteiler auf meinem Kanal BASTEL MICHL. Der Teil mit meiner Lösung der Einhausung kommt auch demnächst. Ich habe einen doppelten Holzrahmen gebaut und mit Mineralwolle gefüllt, Zur Sicht kam ein doppelt verglastes Fenster zum Einsatz. Als Beleuchtung habe ich LED Spots in das Gehäuse verbaut. Leon, great solution for your enclosure with groove profiles and acrylic glass. You have a view from all sides. I am currently showing my construction of the MPCNC in a multi-part on my BASTEL MICHL channel. The part with my solution to the enclosure is coming soon. I built a double wooden frame and filled it with mineral wool. A double-glazed window was used for the view. As lighting, I installed LED spots in the housing. Greetings from Michael (BASTEL MICHL) 👍

[@certified-forklifter]

awesome.

[@st0mper121]

I wanted one for a long time. But i seen toms video of V1 engineering stopping tom from releasing a updated/modified part to public domain. Who wants a CNC that can NOT be updated by public?

[@Denis_Kozlov]

ничего не понял, но очень интересно=))

[@tranceonline]

Schönes Video.. aber AUSSPRACHE OMG! Ist ja schlimmer als bei Stefan oder GreatScott!

[@sorgunakkor1585]

MPCNC ASMR :-)

[@murraymadness4674]

Nice job. However, please stop saying "Mostly Printed", it is "Minimally Printed" CNC, everything important is NOT printed.

[@biggerweld174]

V1 Engineering, the creator of the MPCNC has named it the “Mostly Printed CNC” because a MAJORITY of parts are 3d printed

[@murraymadness4674]

@@biggerweld174Umm, count the parts and get back to me..

[@nevermind1O844]

This accent though 🥴