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DIY Milling Machine Part 4: Manufacturing parts and mounting the Z-Axis

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Today I show you how I made some more parts for the milling machine. I also mounted the Z-Axis parts to the column.
If you want to support me additional to watching my videos I have a Patreon account:
/ alexcnc
Music:
Wintergatan - Valentine
Wintergatan - Paradis

Опубликовано:

27 авг 2024

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Комментарии : 70

@Jer_Schmidt 3 года назад

Really satisfying to watch such quality and precision work! 👍

@bobweiram6321 3 года назад

Yup. These are your peeps. You should check out another one of your fellow Teutons, Jeremy Fielding. Dude built his own robot arm from scratch.

@AlexCNCen 3 года назад

Thanks Jeremy. Nice to see you here :)

@timhunt7830 3 года назад

I’ve watched some of fielding vids. Smart cat as well. I was a cnc machinist for a few years. Loved it. Robodrill mill. Fanuc controls. I’d LOVE and I mean LOVE to have my own mill at home. Of any kind. Manual. Cnc whatever. Man that would be so freaking awesome.

@timhunt7830 3 года назад

Maybe Alex will make one for me? 🥸

@reps 3 года назад

well-planned, organized lubrication lines?? nerd 😛

@AlexCNCen 3 года назад

My current machine doesn't have that. Now I know never again without central lubrication 😅

@molitovv 3 года назад

Hello Me Reps, nice to see you here.

@jamesdavis8021 3 года назад

Very nice design

@daniellindholm 2 года назад

How come you don't have 100k's of subscribers? You are simply awesome. I'm stoked! Really impressive work!

@Thorhian 3 года назад

YESS! Super glad you are continuing. Now that my semester is over I’m working on my much wimpier mill lol.

@Axotron 3 года назад

Very impressive build! One thing maybe worth considering: I think This Old Tony recommended mounting the gas spring the other way around so that the oil inside stays at the seal.

@AlexCNCen 3 года назад

That's true for gas springs but this is only an normal pneumatic cylinder. I will but some oil in the upper chamber. If it turns out to be necessary I can still turn it around :)

@tubosolinas 2 года назад

@@AlexCNCen Excellent choice the pneumatic cylinder.The first thing i replaced on my mill was the gas spring.I didn't like how it worked,also at the end of the travel,the resistance was higher (like it was designed for the trunk of a car!!). The pneumatic cylinder has 3 benefits over counter weights and gas springs. It doesn't add inertia,it has adjustable force,and the force is the same for the entire travel.Also they don't restrain the speed of the axis like gas springs.

@abolibibelot69 3 года назад

This project is impressive and the quality of your work is amazing.

@banzaiwill7672 3 года назад

Loving the progress. Looking forward to seeing the electronic system being setup.

@Bu5H84 3 года назад

Can't wait to see this baby go beast mode on some Alu

@Biokemist-o3k Год назад

Alex you do some fantastic work .!!!!!!

@rapppaa 3 года назад

very cool!!! German quallity, like we say in Portugal!

@Bu5H84 3 года назад

So true

@wilcojuffer5940 3 года назад

Hello Alex, a other way to line out a block on the lathe is a deadcenter between block and life center and put a indicater on the dead center. Nice t-shirt you have Wintergatan 😉 nice video look for the next one 👍👍👍

@ReubenSchoots 3 года назад

I've been hanging out for this! Brilliant job, Alex. Cheers from Australia!

@TrPrecisionMachining 3 года назад

very good video alex..thanks for your time

@GBWM_CNC 3 года назад

Impressive project. Keep it up! 😁

@cnc-ua 3 года назад

Great progress. Thank you

@CalvinoBear 3 года назад

beautiful!

@danmartinrc 3 года назад

Looking great!

@jamespayne8781 3 года назад

Excellent.

@engineerdiy4500 3 года назад

Good job

@TERRYB0688 3 года назад

Alex, I notice you have some nice old machines you are using in the manufacture of your parts, wonder if the cnc mill you are making will have the same longevity, think technology will make it obsolete eventually, lot of work there nice job

@Ale_Lab Год назад

Hi! COming back to your video multiple time to decide the components for my build. For the AC servo. I see you went with a 3000 rpm JMC 750w for the Z. Did you use the same for X and Y or different ones? Like 400w or so. Thanks!

@iainsquelch6223 3 года назад

Hi Alex, congratulations on correcting the errors on the linear guides. Question for you - what are you planning on using for a table on this machine? For my build I am having a difficult time finding suitable t-slot table and don't have any good ideas on what a good solution would be. I am interested to hear what your ideas are. I am looking forward to seeing the next videos in the series.

@AlexCNCen 3 года назад

I will show the table in a future video soon. I used a baseplate and screw on stripes in T shape. That way I can make the t-slot table without having to use a T-slot cutter. I'm pretty sure that wouldn't have worked with my old milling machine.

@jamesdavis8021 3 года назад

I like the parts but,hard anodizing would be nice.just my 2cents worth.

@nilsmechatronics8968 3 года назад

Really good job at planning and assembling.What kind of control and spindle will you use? Good luck Alex in this fantastick cnc build. so satisfying to watch.

@AlexCNCen 3 года назад

The control will be Linuxcnc. I will use the spindle from my current machine. That's a self built BT 30 spindle.

3 года назад

@@AlexCNCen hello 🙂 Surely one of the top builds around! 👍👌 Thank you so much for sharing this experience with us all 🙏 So glad you chose LinuxCNC to run this beauty ❤️ About the spindle, really hope you'll make english version of the spindle build video series to go along the machine build...

@AlexCNCen 3 года назад

An English version is on my list. But I'm not sure if I should redo the old videos or make an entirely new video. I want to modify the spindle so that would be a good opportunity to do so.

@dadoVRC 5 месяцев назад

Parts made from what aluminium alloy? Fibral?

@Z-add 9 месяцев назад

You didn't explain the working of those cylinders on the zaxis.

@stevendoesburg6555 3 года назад

Looking good! How are you preloading the angular contact bearings against each other on the ballscrews? With the clamp on the bearing block or with the nut on the end of the ballscrew? If you are using the nut, are the spacers aluminium? This would create a situation where the bearing pre-load increases with bearing temperature due to thermal expansion of the spacers, which is unstable and can runaway. It has the potential to lead to bearing failure. The mitigation is to use spacers with a coefficient of thermal expansion that is (approximately) the same as or smaller than the ballscrew itself.

@AlexCNCen 3 года назад

The bearing are matched so the outer ring and innere ring just have to be pressed against each other to get the right preload.

@Ale_Lab 3 года назад

Amazing job! Really looking forward to see the next video. Question, which encoder did you mounted on the spindle Z and why? Is it like to receive a feedback movement to compare with the servo encoder? Like for linear scale

@harindugamlath 3 года назад

I also thought the same? Are you using that encoder instead of a linear scale? Nice build Alex.

@Ale_Lab 3 года назад

@@harindugamlath It that case is quite a neat solution. Less bulky than a linear scale and encoder can get to a really high pulse count.

@AlexCNCen 3 года назад

That's just a brake for the Z-Axis because the motor has none. I don't think an encoder would make sense here. The motor has already an 20 bit encoder. That's about 1 million positions per rev. I will use linear scales with 1 µm resolution for X/Y and 0,5 µm resolution for Z. Got those used that's the reason for the higher resolution on Z.

@Ale_Lab 3 года назад

@@AlexCNCen Got it. How does the brake works? Is it a magnetic one that without current applys friction to the ball screw? 1 and 0.5um liner scale resution seems amazing. For such precision level you will need to thermo isolate the machine :-)

@AlexCNCen 3 года назад

Sorry totally forgot to answer. It is a brake disc that gets wedged between to metal disc with springs. A electromagnet pulls the discs apart.

@bkofford 3 года назад

Nice shirt!

@eduardsik6850 3 года назад

Hello Alex, great build! What is the size and source of the ball screw?

@AlexCNCen 3 года назад

That one is from a German company called KGT Kammerer. The diameter is 30 mm and 5 mm pitch. I got that as new old stock.

@engineerdiy4500 3 года назад

Nice👍

@BenM0 2 года назад

@Alex CNC en Hi dear Alex Thanks for sharing your great project and inspiring me to do it for myself.I have a question about timming belt and pulley that i see you're using in all axises.I saw you're using HTD 5M type. Is the HTD best choise for your milling machine? How do you choose this one among several types of timing belts/pullies? I'm going to use this setup in my desing buy i really concern about the amount of its backlash especially under the load of machining parts. Do you think is it negligible? I'm really appreciate if you give me some info about why do you choose HTD type and what accuracy do you expect from it? Thank you so much

@AlexCNCen 2 года назад

Hi, the HTD profile is used for backlash free transmission. So it should be finde to be used here and I haven't encountered any problems yet. Why I chose the 15 mm HTD 5m? Mostly because a friend with a very similar application had good results. And I do not care to much about inaccuracy induced by the belt because I run glass scales and a control loop with them.

@BenM0 2 года назад

@@AlexCNCen Thank you so much ❤

@XStance7 2 года назад

wow awesome! where did you buy/source your ball screws ?

@AlexCNCen 2 года назад

Got them from a friend.

@SeabassEngineering 3 года назад

Nice build! @15:25 what are those little push-fit grease fittings called? I need some of those for my project!

@AlexCNCen 3 года назад

Those are basically just high pressure push fittings. Not sure what they are called exactly. I got them from sinntec.

@Bakafish 3 года назад

You seem to be using Aluminum for some of the critical parts like the fixed end bearing housing and Z axis backing plate. Do you have any concerns about strength? I'm debating the use of steel over Aluminum (which is much easier to work with) and so I'm encouraged by your choice, but wonder if it will be strong enough?

@AlexCNCen 3 года назад

I think that will be fine. those part do not have to transmit the forces over a long distance. Like the Z-plate. Ist pretty much only a spacer. The bearing housings are not very tall. So the distance through the aluminium into the concrete is not long. Otherwise i will have to remake those parts if they causes problems. But easier machining was the reason why I used aluminium instead of steel.

@T-omi 3 года назад

Why are you using this table arrangement ? I mean small table and long rail under it. Why not to flip it like on big manual mill that You have? That way You would have more space where to put clamps, 4th axis etc. Are there any negatives why that arrangement with bigger table and rails on top of Linear carriages? Only think that comes to my mind is that stepper/ servo will be moving together with table and that You will need more space around machine to avoid collisions. Are there any other reasons why not to flip it ?

@nicholasjacob3594 3 года назад

All VMCs do this because it offers more rigidity and does not change in rigidity depending on the position. It is cheaper to do it the way you suggest but it comes with some drawbacks. Hope this answers your question

@AlexCNCen 3 года назад

I see advantages and disadvantages for both ways. Not sure which one is the better one. I will do most of my work with a vice. So I do not really need the way bigger table to clamp big things and so on. And also the space is quite limited. That way I was able to safe some important space.