Using off the shelf motor controller defies the purpose of linear motors in CNC, which is to prevent vibrations. Ideally you'd have to make an analog driver that provides linear current changes, not a chopped DC one like in all those drivers. In other words you need an audio amplifier on the output & and at least 3 function generators on the input which are 120 degrees out of phase. This can be done digitally, with proper filtering to smooth out the output current. But the power amplifier has to be linear. At least you could try to use some low pass filters to smooth out the chopped DC from the driver. But then this might mess up the current sensing those drivers use to orient their phases.

А что за марка стали идёт в наполнение ( из чего пруток сделан )? для сердечника.

Came for the engineering, stayed for the best intro music I've ever heard.

Real ones are an U shaped stainless piece with neodymium magnets glued to both sides. The coils are inside an T shaped epoxy

Next time try using PVA or BOVH filament. Cast in it and than pour in water. PVA gets dissolved and you have your part no matter how impossible for release it is.

hope have a cooperation

Your project is very interesting, and I would like to invite you to explore our newly launched LINEAR MOTOR. I'd be happy to discuss this in more detail with you.😍

Well done ! 😍

Somehow I forgot to subscribe after finding the first video, glad that the second one popped up in my feed. I do have a question though, what's the program called that you use to draw/sketch in? I Don't recognise it and I'd like to take a closer look at it.

Awesome project, please keep it going! Where is the part 1 video? I only see 0 and 2 on your channel.

Hi. Nice project, but i see Part 0 and Part 2....where is Part 1 ???

Love the build and video! In the editing / mixing stage could you adjust things to make your voice easier to hear please? I find it quite difficult to parse. Best of luck for the channel and looking forward to the next instalment!

Hello, I apologize for contacting you here. We think your content is a great fit for our product, are you interested in accepting a business partnership?

Turn the music off. It's unnecessary and is almost as loud as your voice over.

Great start for the channel. Good luck

I sugest you make it tubular linear. make the stator of widing couper so the cable dont have to move and create friction. if dont get to hot you can put the cable inside the tube. and the rotor will be an holow tube with magnets using halbach aragment in a sandwich. so the magnetic field will be focus inside and the outside(outer ring side) no magnetism. powerful and easy. Maybe i need to hink a litel bit more on the stator because is not valid having it as sandwich widings because the exterior has less magnetic force the inside where cable goes. To make it easy can be used as sheet as yours plane instead as tube.but coper down and magnets up and use halbach array aragement to avoid magnetism on top on machinery and empower interaction with the stator. And to see where it is position just lector hall senzor in one side with track detection. i am not goo in electronics but i can see the mechanical deasing.

Maybe try coreless motor and Hallbach array as used in ASML position system. As i understand Iron core have big disadvantage - it "ripple" and tend to make very unwanted unpredicted orthogonal force that ruine precision.

finally someone thnk like me. i was wondering why are not more linear motors and why are they so expensive. i dont finde the point where this have to be expensive. let see the video boy(or girl), ok creator hahaha.

Did you measure how much force this produces? Also just add a second linear rail on the other side of the magnets to keep it from cantilevering around. Thicker printed parts and sandwiching the alu profiles between a plate on the top and bottom should solve all those problems.

I think your best bet is to look for premade E or U cores for this, but if you really want to make your own I'd suggest using either a powdered iron or iron oxide and premix it with the epoxy. That seems the best way to optimize the core itself to me, you could also use the premixed epoxy with iron pieces like your cut wire. Going further you could try finding an epoxy that could be thinned with a solvent before mixing to get the granules tighter packed.

i like how one section of the video timeline is named Blah Blah

Neat use of wax for your casting. See if you can characterise the permeability and lossiness of different core/yoke materials, by putting a sample of constant dimensions into a solenoid, which you can use to measure inductance. Lossiness would be harder to quantify, but if you use a scope to measure its Q-factor in a tank circuit at a few frequencies, and compare that to what its DC resistance would imply, you should get a value. If you put a lot of turns on it and/or switch a lot of current into it, you can likely see magnetic saturation on your scope too, which would be a handy thing to know. Especially if you plan on water-cooling your yoke. FYI I have similarly sized toroidal cores made of both iron powder and ferrite, and the iron powder is more than an order of magnitude worse than the ferrite. Far less inductance per turns-squared. Modern ferrites are damn good, you can likely crush some toroids in a tough bag with a hammer.

What did you shave and melt in that grey container? Was it to act as a release agent or self inside so nothing leaked out? I use acetone on ABS prints when I want to seal so learning other methods would be helpful, Hopefully I heard back from you!

I see you've done what i suggested but instead of powder, you used steel wire which is also great. But i would still recommend iron powder to get more iron in the core. Steel wire pieces are too big which generate Eddie currents. Also, you can pack more iron using powder on the same volume of the cast. BTW are these programs you used free? Good luck

You should have used iron powder for the yoke in my opnion.

The errors is due to two files you have to delete tho I don’t remember the path to them

2nd video and in this quality! Fantastic! Thanks for the insight into the ST software.

I really like the idea of casting your own magnetics using short wire pieces in resin, like a jankier version of the typical laminated-core construction for transformers! I'm wondering how this affects the magnetic properties, though - I suspect saturation field might be quite low, since the majority of the field will likely go through the small contact areas between the wire pieces. How did you model this in the simulations (3:11)? And did you do any measurements of the coil's performance, are their inductances and saturation currents reasonable? (I'm curious because I'm also working on an electronics project with custom magnetics right now :) Have a first iteration already machined, though, just have to get my control loop to cooperate and stop it from doing a 4:07)

Well well well, look who just posted a nice video again!

Man I am really loving this video series so far, super nice to see your progress! For the ripples due to the reluctance 'cogging' force that you have with these types of actuators you can do a measurement of these forces by measuring the EMF induced if you move the coil unit manually. This you can then use in a feed-forward control element to compensate for this position dependent force and increase the position control accuracy. I am not too familiar with your driver board setup but I can imagine that they have some feature build in to include these measurements. I can't wait to see your next video!

Do you have an OEM Linear Motor to compare your results against?

nice

Greate work, I wants to make one ,and wants to use for diy cnc. How to do it?

Fourth 🗣️🔥🔥🔥

Perfect!

You saved my weekend.

2

First :D

Please continue this series. There's almost no good videos on YT showing full complete builds of linear motors.

Did you consider a tubular linear motor design? It seems it might be easier to construct.

Wait so what lateral spacing do you want for the stator and the magnets?

This is one heck of a first video. Fantastic work!

Why didn’t they want to repeat the stepper motor in an expanded form? two rows of plates with teeth and a magnet between them - the lower part, and the same two rows of teeth on top with a coil. Was it really difficult?

There are many smart people in Austria too.

Would you start counting months in programming at 0 or 1?

I was wondering, why space apart the magnets instead of using a Halbach array?

It'll be way stronger if you put an iron core in the coils instead of plastic - either laminated or powdered, not just solid iron or eddy currents will be a problem

Sooooo? Are we measuring precision or what?

Is your youtube channle open for sposnorship ? Can you share with me your business email ?

Is that going to have good resolution? It looks like 1cm resolution to me.