How To Turn Any Motor Into A Servo Motor (

[@mor8266]

Imagine taking a college course with this guy as the professor. Talk about getting your monies worth. So much learned from Mr. Fielding videos. Thank you so much.

[@someotherdude]

Well said. I'm a high school teacher who is in awe of his uncluttered easygoing approach, and I'm eating up his technical knowledge at the same time. Huge, huge help to me.

[@MrThinking4myself]

I'd pay that tuition!

[@ZackLeath]

I’m not hating at all. I love this guy’s channel. He does a great job and is insanely smart. With that being said, you can learn everything you need to know about the projects he does with an associates of applied science in industrial systems or something similar. Or even a diploma which takes less time to get. Sure you’ll need work in the field to sharpen those skills you learn but it all comes together eventually and fairly quickly if you’re willing and wanting to learn. And if you’re interested in it.

[@idiyerbill1968]

College is boring no matter who is yor teacher , the reason it's boring is because the things you are studying are not interesting to you which is not the case here on KZbin you only watch what you like what exists you of course Jeremy is super great teacher but you can find great teachers in school as well and still get bored

[@conorstewart2214]

@@idiyerbill1968 if you are getting that bored then it is probably be a use you are studying a subject you aren’t really interested in. If you are passionate you won’t get bored unless it is a bad lecturer.

[@brianchurch]

1:34 "So let's make a servo motor out of this treadmill motor ... OBVIOUSLY!" I don't know why but that made me so happy.

[@johnanthony2545]

Same here lol.

[@hgbugalou]

This is the stuff that makes me feel better about the internet spreading stupid stuff like antivax and flat earth. You are spreading high grade engineering information to the masses. Great work as always.

[@inspireonex]

Yeah. Tell em. You gotta vax it mon.

[@Madichmotorsports]

Reno Simpson you might want to refrain from watching these truly intelligent vids, your mind is too simple. Knowing WHERE to find pertinent information is a better use of your limited grey matter than wasting calories/time learning/knowing/storing information. Going to your phone/w.w.w. for information is probably the wisest choice most ppl make all day, knucklehead.

[@Jason_Family_Man]

KEEP YOUR PSEUDOSCIENCE GARBAGE OUT OF HERE ENGINEERING HAS NOTHING TO DO WITH HELIOCENTRISM THE EARTH IS FLAT AND STATIONARY VACCINES ARE POISON AND YOU SHOULD DEFINITELY NOT EAT ANIMAL PRODUCTS NOW START CRYING ABOUT CAPITAL LETTERS

[@Jason_Family_Man]

@Reno Simpson YOU ARE WHAT YOU EAT IT'S AS SIMPLE AS THAT YOU CONSUME THE DNA THE FLESH THE BLOOD OF AN ANIMAL YOU HAVE A SIMULATED THAT DNA INTO YOUR DNA JUST DOESN'T HAPPEN INSTANTANEOUSLY COMIC LEE LIKE YOU WOULD THINK ON THE MOVIE WHERE YOU TURN INTO A GIANT TURKEY AS SOON AS YOU EAT A CHUNK OF TURKEY BACON 🤣😂 IT'S MORE LIKE IF YOU FEED A NATION A CONSTANT SUPPLY OF ULTRA FEMINIZED FEMALE BABY BOVINE 4 GENERATIONS YOU'D KIND OF WIND UP WITH A ULTRA FEMINIZED FEMALE BABY BULLVINE / PEOPLE HYBRID NOW LET'S LOOK AT THE CHARACTERISTICS OF A ULTRA FEMINIZED FEMALE BOVINE BABY FRIGHTENED EASILY-🤔 DIDN'T YOUR RELIGION JUST PREDICT A GIANT ASTEROID WAS GOING TO HIT THE EARTH AND NOTHING HAPPENED JUST YESTERDAY? EASY TO MANIPULATE-DID YOU KNOW THAT EVERY PICTURE OF A SATELLITE IN SPACE IS A PIECE OF ARTWORK AND CGI AND THEY TELL YOU THIS AND IF YOU LOOK CLOSELY AT IT YOU WILL REALIZE YOU'RE LOOKING AT A FUCKING CARTOON? THE FEMALES IN PARTICULAR BELIEVE STRONGLY BECAUSE THE HERD BELIEVES STRONGLY ABOUT PARTICULAR THINGS THIS IS WHY COWS HAVE A HERD MENTALITY AND NOW SO DO YOU BECAUSE YOU CONSUME THEM FLESH AND BLOOD REASON NUMBER TWO 🤣😂 ADRENOCHROME I'M HOPING THAT YOU'LL ASK ME FOR INFORMATION ON ADRENOCHROME

[@tophatv2902]

@@Jason_Family_Man Boomer begone

[@WrexShepard]

I just watched your newest vid with the cnc table saw and then this one was suggested. Man, as a recovering addict building up tools for my little apartment workshop from nothing, I’m so jealous of your shop and tools. You’re living the dream, making all this cool stuff. I hope to get there someday soon. Right now I’m still in the “search through trash to find stuff to tear apart so I can hoard the components for later use.” Phase of things.

[@sick-n-tired-patriot3922]

Who needs college. This is what I needed growing up. I'm 49 years old. Now own my own machine shop. I learned everything I know in tool and die works, own my own. rolling up my sleeves and getting dirty. I have always wanted to learn the electronics side of things to build my own machines. That is now possible. Thanks to KZbin and this good gentleman Jeremy Fielding.

[@haroldbottom3474]

I worked in the electrical field for 30 years. I love watching videos from different people in the field of electricity and electronics. I don't understand why I just found your video collection...Well I just subscribed !! Keep up the good work.

[@EdgarInventor]

Gifted guy, to an inspiring level. We need more of these...

[@JohnDavidDunlap]

So true.

[@dasibaho]

I would have loved to have you as a teacher when I was in high school 25 years ago... I really love the format of your videos. No music, no bullshit, just technical knowledge transmission. Thank man 👍🏻

[@CCCfeinman55]

Great video! You didn’t shy away from the necessary compromises, or excuse the experimental nature of this project. This, IMO, is engineering at its best.

[@octapc]

25 seconds in and I have already clicked "like" button.

[@darkwinter6028]

The other thing that dedicated servo motors have that many non-servo permanent magnet motors don’t is that they are designed to have low to zero “cogging” - when you turn the shaft, it doesn’t want to stick to the poles of the magnets. This results in better accuracy overall and lower power consumption when holding a position.

[@joetransue]

My thought was that gearing reduction and code that accelerates and decelerates would help. If you wanted to move a really big mass relatively precisely but not at a high duty cycle, this setup could be fantastic. I suspect it might not be ideal for the x and y on a CNC where sudden starts and stops and high accuracy/repeatability are all important. MAYBE, you could design two motors that are electronically and mechanically coupled to work together. Lots of things are possible if you have time, motivation, and willingness to discover dead ends for the sake of learning :)

[@johnrobholmes]

It depends on if the position is being held in a low or high reluctance position. A high detent force motor will have higher holding force with better efficiency in low reluctance positions, a low detent motor will have better accuracy and less vibrations in high reluctance positions. If micro stepping is not wanted or needed for accuracy (or if surfaces finishes aren't impacted) , higher detent force will actually make for a better servo motor.

[@RyanVasquez6089]

@@joetransue ideally you don't use gearbox's in a servo application. They have backlash. Most servos should be direct drive.

[@joetransue]

@@RyanVasquez6089 Right, that was why I thought of using two that "fight" each other. I realize purpose built equipment will always be better, but if you have the stuff sitting around and the cost is basically creativity and a few standard parts, then I think that is an OK time to leave the more orthodox methods for those with the budget.

[@pablopeu]

The noise is called Dithering and it happens because the encoder keeps sending adjacent readings and does not settle on a single one. Its like a ping pong match between two adjacent encoder positions.

[@f.k.burnham8491]

Quite interesting. I would think the windings would eventually overheat, even with cooling. I base this on frozen motors from turntables, antenna rotors, starters, and other consumer & industrial equipment I have worked on for decades. I do agree, you must have a motor designed for the job. Great video. Please keep them coming!

[@lazyh-online4839]

Heat is created by amps, if you have a given amount of airflow then it will cool regardless of motor rpm, so long as the airflow remains the same regardless. If the motor itself is providing its own airflow through a direct drive fan like most treadmill motors then applying torque to hold a position is much more likely to cause the motor to overheat than the same motor with externally driven airflow.

[@skewedmaker]

I have only done a few projects with toy servos, so this was a fascinating lesson on the mechanics of servos at a larger scale. Thanks!

[@vinceshanks9210]

I have the same servo drive on my retrofit milling machine. Use the servo tuning software to help dial in the position holding. This will get rid of the annoying buzzing noise. Awesome content!

[@michaeltucker8645]

I've made this control exactly same way with a different dc motor meter you suggested works great. I've made my bandsaw, drumsander, a cement/concrete mixer from old washing machine and treadmill motor, router table and table saw all worth treadmill motors. I guess it's a over sized cnc machine now. I wanted to make a water cnc with a cheap 79.99 harbor freight pressure washer over seen it done. Not this size tho. Saved me thousands thanks so much

[@PoignantPirate]

Something to look for is an RJ-45 "Keystone" jack if you're looking for something more permanent than that breakout board (for an enclosure or a carriage install for example). Keystone jacks are designed to snap into a hole on wall plates, patch panels, and it's VERY easy to cut a matching hole in metal plate or wood. They're also quickly replaceable if you manage to break one. You will need a small tool called a 'punch down tool', but they are cheap (and you can actually get by with a small flat-head screwdriver in a pinch).

[@-robo-]

I wonder if he is using CAT5, and whether there is interference from the unshielded cable. Good thought on the keystone, they are very handy indeed.

[@dubbadan1]

I've been trying to make a servo out of a car wiper motor using an arduino, with a potentiometer as the "encoder". After watching this, I think I might get a digital encoder...

[@chandrahasan3225]

Try old ink jet printer encounter. it may work

[@michaelkeymont501]

Use a Pololu JRK 12V12 motor driver (around $100 each...) with a precision potentiometer that rotates continuously. That’s what I use in my sim racing motion rig and it works great. They hook up via USB (or serial...) and have the control software built in. The continuous pot was expensive - $45 each - but they have been operating without fail for years now. Note: you CAN use a non-continuous pot, but in the event that something goes wrong and the motor keeps turning past the stops of the pot, your pot will be broken and the signal to the motor driver will be missing. Continuous rotation pots prevent that from happening. FWIW, the arduino can work, but I used a MotoMonster driver when I tried that route. Not enough power through the MotoMonster for my needs, but it DID work while I was using it. The JRK12v12 has the ability to detect if the pot becomes disconnected, for example. It also is smart about monitoring current overloads etc.

[@uprightfossil6673]

@@michaelkeymont501 what? Whuut? Whuuuuuuuut? When you guys make casual conversation out of tech stuff you remind me that I can adjust the dial on the toaster, and chew gum... But not at the same time. I am so glad for you smart people. Peace

[@patri0t1776]

You can use two photo interrupters and a encoder wheel built to your specification. There's a video on it by Homofaciens.

[@IH1940HAY]

@@patri0t1776 encoder

[@jtsimmons3133]

Pretty cool. Haven't messed with servos since my Navy days (60 years ago). They impressed me then, they impress me now, as does your explanation. Nice vid.

[@mark-wn5ek]

I think I've stumbled onto a genius in action. No hyperbole, no bs....just useful, understandable information laid out in layman's terms and enjoyable to watch...and LEARN. Thank you very much.

[@NicholasMaietta]

Wow, I've learned far more here about electric motors and CNC stuff here than anywhere else. In one video. You are awesome. Thanks!

[@joeycmore]

America is built on this sort of ingenuity and this man is a genius!

[@shuvra4352]

One of the smartest engineering presentation he delivers in the KZbin.

[@MechSupport]

I’m really enjoying your videos! I have one small recommendation: it would be very helpful if you would briefly mention the meaning of some of the acronyms you use in your videos, at least once per video, for newcomers (e.g. PLC = Programmable Logic Controller, CNC = Computerized Numerical Control, PWM = Pulse Width Modulation). Your videos are so well done, I’m thoroughly hooked!

[@christopherrasmussen8718]

I have had a bare (cutting) plotter for years (with servo motors). Good buddy of mine sent me a servo controller, power supply and software. I have been staring at it for several years. I think during this time of 'trouble' while I hunker down I will try it. You made so much sense. Thank you. Stay safe!

[@EUnit111986]

@Jeremy Fielding why hasn't KZbin led me to you much sooner? I'm so glad I found you. Your material is gold ✨

[@gus473]

👍 Treadmill motors also can be rigged as mini wind turbine generators! But your use is MUCH cooler....! Thanks for the info! 😎

[@richardumphress9131]

Do you answer questions?? Your videos are simply outstanding. Thanks

[@quint1715]

So happy I found this guy..

[@neatmachine]

Thanks for a great video! I like how you use readily available components to employ in a wide variety of applications and explain the function of each component as well as alternative approaches. Also providing details such as wiring diagrams, component sources and warnings really help to let your subscribers duplicate what you are demonstrating. Awesome!

[@luisca92]

I'm apprenticng under my inlaw who's an electrical engineer. I love your matter of fact way of expaning things very down to earth and I'm loving seeing how much i can follow what you're saying on my own. Thank you so much for this content

[@Miata822]

Cool stuff. Thanks for the servo 101. I have a project down on the do-list that will require a servo. Preliminary looking left me a little confused on terminology. This really helps. Will still be several months before I get a chance to start.

[@mindsanity13]

You are just so friggen dang brilliant. I absolutely appreciate you sharing all of this knowledge and info in a way anyone can understand without being condescending or overly technical

[@boots7859]

Outstanding video yet again. Very few people on YT seem to be willing to actually 'Make' something vs just videoing some bits or bobs they've bought. These are the types of videos that inspire people to experiment with 'junk' and learn to do cool stuff. Keep up the good work.

[@flywittzbeats4008]

This is such a wildly beautiful explanation on servos. Thank you so much for actually including all the possibilities and potential things as opposed to just “here is a servo motor for arduino’s” ….and thank you for actually explaining what it actually is better than anyone else.

[@physicsguybrian]

Jeremy, you asked for comments. Here is mine. As a physicist who has worked in industry a long time in R&D and various engineering roles, I'd like to offer the following feedback: Servo motors exist because they can do well what non-servo motors cannot do well. They are engineered to handle the demands of the applications for which they are intended. True, one can make just about anything do something similar to something properly designed for a job but it won't last. You cannot simply sidestep the physics and engineering that goes into building proper motors for the demands of the intended application. To Jeremy's credit, he acknowledges this up front. That motor will burn up if used this way except in the lightest of loads and low duty cycle. This is a very informative overview of how these kinds of closed loop systems work. However, you cannot simply make a motor designed for a specific application play nice in an altogether different application by trying to make it act like the appropriate motor. Except in the most general sense, they are not that interchangeable. This is why there are complete industries that revolve around different types of motors. You could argue "That's nonsense and hype for the sake of revenue generation" but you'd be wrong. Motor design is very application specific and rightly so. There is a right motor for every application and one should seriously consider the long term cost/benefit analysis when it comes to the investment. Sure you can cut corners and try to make a motor do what it was not specifically designed for (and watch it under perform and eventually fail) rinse and repeat, or do the research and buy the right motor once and be happy for a long time. Of course there is a lot of good learning that CAN happen if one pursues the trial and error approach and if that is what one wants to do for the sake of tinkering then heck yes, forge ahead. However, if you have the math competency/comfort and a technical inclination, spend some time reading up on motor designs and their applications. It could save you a lot of money in the long run. Whichever path you decide, I wish you a pleasant journey! Peace all and Jeremy keep up the excellent channel!!

[@Jeremy_Fielding]

While I agree with you statements above and acknowledged these facts in the video. I was hoping for a more specific discussion of problems for the sake of learning. I wanted to tap my community of knowledge with what I thought was an interesting question.

[@ivanazulic]

Ethernet cable is actually Cat5 or even Cat6 cable with RJ45 connectors

[@reaganharder1480]

And I think I read somewhere that most of what's referred to as RJ45 isn't technically RJ45 but something else (I don't remember what), but it's just so commonly referred to as RJ45 that everyone calls it that

[@HunGredy]

@@reaganharder1480 It might be the phone cable and its sisters. They have very similar looking connectors, only with less than 8 pins, and I can imagine people look at it and think RJ45 is the group of connectors which look like that (transparent and rectangular, used on coloured twisted cables, latch on top, connection row on bottom). RJ45 is specifically the 8-pin connector used for computer connections.

[@Encrypt-]

@@reaganharder1480 8P8C connector 😁

[@heroesandzeros7802]

The treadmill itself was a good source of electronic controls. It already has a motor controller and they do all sorts of things. The treadmill will have all the pushbuttons on the control panel. Not sure if any use encoders. But you can install a longer belt on the treadmill and use that as an automated conveyor.

[@LogicalNiko]

The names of the jacks and wire are all heavily used interchangeably. You will see the proper names used more in connector/cabling manufacturer catalogs or large electrical supply houses (e.g. digikey). However for those who like to research things (pedantic warning): RJ45 is registered jack 45 (from Bell labs USOC standards) It is the the female jack only (and registered refers to the pin on the back for directional registration). The male connector is actually called an (Bell USOC) 8p8c connector for 8 position, 8 conductor. RJ11 was used in serial and US phone service and typically used a 6p6c connector (although typically used with only 2 or 4 wire flat cable or early twisted pair) and wired in USOC wiring standard (predating tia/eia specs). Category 1-7 (CatX) are cable standards for twisted pair cabling. The category rating specifies the minimal gauge of wire, quantity of conductors, and twists per inch (to cancel crosstalk) and the speed rating in MHz that the cable should be tested to without getting significant errors from electrical impedance. Having an E at the end of the spec means enhanced speed rating. Although sometimes resellers will try to confuse the actual cable rating to make it sound like their cable is better (better in cabling really is only relates to how much quality control to the standard they test for, and ability for the cable to withstand stress under various hostile conditions). Ethernet is a low level standard relating to the physical encoding of electrical pulses, signal clock timing, framing of bits on a shared wire, and signal congestion control (what happens if two things energize the same conductor at once). This data protocol does not specify the physical media (when I started in the industry it was 10base5 over coax and AUI cables, and in school we even did things like: Ethernet over laser, ultrasonic, and once even once over a barbed wire fence).

[@brocktechnology]

I've long been waiting for someone to work out the finer points of implementing a servomotor with hobbyist grade parts, this isn't it, but it's a perfectly worthwhile exploration of the topic.

[@ChristopherGoggans]

Look into the Odrive project, it seems to be very similar to what you're looking for. It takes a hobby size BLDC combines it with an encoder and effectively makes a DIY servo for home use.

[@ColinMcNulty]

25 years ago my very first job was a Motion Control Engineer and I worked on many projects providing the servo motors and their control, including aerodynamic robotic arms for wind tunnel testing, automated headlight testing rigs, satellite tracking TV transmission vans, X-Y plasma torch cutters, air to air missile testing rigs, tank tracked robots that would craw inside nuclear reactors for testing and maintenance, Formula 1 car testing rigs, etc etc. Unfortunately in my mid 20's I was chasing the cash so got into IT *yawn*, a decision that in many respects I regret. Videos like this take me back and make me wonder how life would have been different had I made other choices. Keep up the good work Jeremy!

[@brandocommando36]

He really knows his stuff! Learning so much Jeremy thank you!!!

[@athiker7209]

I'd prefer a fan or blower, directed into the winding area, using a thermostat control, that's Attached on the motor housing. Maybe when the motor is actually connected to the mechanical load,that chatter will be eliminated. Neat little project you have. Thanks for sharing.

[@AnthonyBriganceCook]

Thanks for all your curiosity. An inspiration for problem solvers everywhere, and another reason I believe that arts and sciences need to be further linked in our education. I see these videos as a precursor to more knowledge being shared and I hope you get as much pleasure working these projects as they bring to your viewers! Best wishes for more great tours in the future. Yaksawa robotics was great!

[@jimhumphries7299]

Great info. I can see this working fairly well in some applications. Having been a machinist for 44 years I see metal chips and dust being a problem with open face motor. However if properly gaurded this could make for a cheap and easy way to go. Thanks again for the easy to understand info.

[@mccunnj]

Love it! I have my servos did a software reset when they do not need to hold/stall.

[@moonolyth]

Work in an EMC lab and our turntable busted! going to spend about 6-7grand to get a new system. Replacing the encoder first to see if it will work.. 100 to 400 bucks. Then purchase the 7k unit. what a waste when you could build one of these and a backup unit.. or two. I'm just a Ship and Rec. clerk I have skills that could save them bucks and these guys are engineers, but can't figure out they can pick up some of this stuff so cheap this exact unit would work well. PS I've picked up about 5 motors now the one you have is the largest one I've seen. Most I have are about 1.5 to 2hp. On is dinky and states 2hp.. not sure to believe that! Fantastic video !!

[@bhabi7071]

Yet another informative video from Mr. Fielding. Clear, articulate, no attitude, unpretentious, comfortable in his own shoes. Thank you for just saying 'i didn't know this was an rj45'. 1. I finally knew something you didn't. :) 2. It just underscores the level of humility and lack of pretension that permeates all your work on this channel. 3. I won't feel quite as bad the next time I encounter that "thing a ma bob" that I don't know name of. With great appreciation.

[@CJforUSA]

Jeremy, I remember watching you when you were just a kid. You amazed me then and still amaze me.

[@fredblair4307]

I'm so glad that you decided to pay attention in school your a very very smart young man

[@kywildcats6476]

Man you the only one I would trust because you are a damn good engineer. What would be better a 3060 engraver , or 3060 milling for stainless steel? I'm new on the cnc machines. And spindles is best. Thanks man ,keep on,keeping on.

[@northwoodsliving101]

What a Godsend Jeremy Fielding is, THANK YOU JEREMY!!!

[@mdvener]

You are one smart man. Hats off to Mr. Fielding.

[@TheDrumminjay]

You're a genius, good sir. I love the channel

[@azmike1956]

Jeremy, thanks for bringing us to a higher level in DIY projects. It makes for interesting ideas this close to Halloween & Christmas. Still have to get my shop set up the rest of the way & all of these ideas must be considered. Take care brother! 😊👍

[@totally_not_a_bot]

For sudden stops at that power, you might want to consider a dump resistor. Basically, you use a couple of relays to switch the motor over to a big resistive load. I believe HAAS uses what are basically the heating elements from electric stoves. Using that, you can go from full blast to dead stop almost instantly without damaging your controller. The only drawback is the heat. When you stop that fast, the backcurrent can be substantial. Good for emergency stops.

[@Jeremy_Fielding]

You can buy braking resistors for this controller. I just didn’t need it for demonstrating the concept

[@AtticusDraco]

That was the most intriguing thing I've seen on YT in a long time,, Thank You, JF! While viewing your demonstration the immediate concern I had was the heat generated by this system. As setup, prolonged use, that's gonna get hot Hotter than any stepper motor, I would suspect. In other words,, that fan has to stay somehow

[@philthefishaddict1484]

You are a really good educator.

[@dennisk5818]

This is awesome. Basement workshop engineering at it's best. Video editing with titling, is good. Easy to understand. I don't recall the specs, but I worked in a company that made DC servo motors. These had a range of applications from motion picture camera motors to the older tape drive systems. Some used optical encoders, some were just driven.

[@TediumGenius]

Your new video space is working out great Jeremy! That angled ceiling works for the lighting and sound, with plenty of wall real estate for white boards and other things! This video is a great topic, thanks!!

[@arthurmorgan8966]

This guy deserves a TV show at Discovery Channel or something

[@nickreed1367]

i used to work at a life fitness plant years ago. Those treadmill motors alot of times are tore down and rebuilt. pretty durable motors.-Kip

[@parael8352]

Neat project. It might be good as an auxiliary axis where you can turn it on, get to a position, then shut it off. Maybe use it to roll out sheet metal for example. The limitations of course are with the heat & holding a position. It also might not be too persice between rotations (assuming the torque of a motor that size is needed & expecting repeatable accuracy). For example I wouldn't want to use it for a DIY robot axis, (Ha). It might be good for an application that just goes back & fourth. Great use of the encoder to achieve a certain angle. The size of the motor would have the umph to go back the other direction, yet not causing the strain of holding a stopped position. Thanks for the brainstorm & asking us the audience to chime in!

[@heroesandzeros7802]

If you use an AC motor you can add a DPDT NONC relay to inject a DC voltage that would stop the motor instantly and hold position.

[@ellobow]

Wow, this is awesome! Although, as I work professionally with motor control in industrial machinery a DC motor holding at standstill gives me the shivers. As they are not frequency dependent, any current will apply a dynamic torque, if you compare to 3 phase AC motors that will have standstill just by applying DC current (although they too will get hot holding) So the buzzing at standstill is actually the motor bouncing back and forth. Still really cool that it actually work, and I love this channel and all the things you manage to do with salvaged electromechanics! I think this will be difficult to not try at home :s

[@ellobow]

@glyn hodges yes, youre right there. but in that case because the gear ratio, turning the output shaft takes so much force you barely need to apply any holding torque.

[@ellobow]

@glyn hodges agreed. To optimize this, he needs a little feedback filter or hysteresis. Although this video is of course to show that this setup is possible, not that it's optimal :)

[@botseyfern]

Great,,IV to look back over a couple of Ur videos,,but this is great

[@lordjamescbeeson8579]

You are very inspiring and its fascinating to see what you will do next. I want to convert my car to electric.

[@TheBrick2]

I think the DC servos we use at work are multi phase DC, so I think this gives them greater control and precision.... But they are thousands! We further improve things by using gearboxes (very precise practically zero backlash) of the order 30:1 ish ( I forget exact ratio). Good hack, love the philosophy.

[@johncooper7242]

wow impressive tutorial ....you certainly know your stuff and you're a natural teacher too Great video

[@AccidentalScience]

Universal motors, that are dc motors with series excitation, are not suitable as servo because their series coil, but can be modified to connect the stator coil to a constant source of current.

[@GeoffTV2]

Great video thank you Jeremy. My thinking is that it might be better to have a belt drive reduction on the output and have the encoder mounted on that. I'm thinking that the amount of reduction should be whatever gives a sensible speed output for a lathe head (say 1000-2000 rpm?) when the motor is going full blat. This'll give more torque on the output and help with the precision on positioning. I'm suggesting belt drive because of the unavoidable on the backlash in geared reduction. As it is, this is inspiring stuff though.

[@ManCrafting]

This gives me so many ideas. I started watching this with a headache, but couldn’t stop. I’m sending this vid to my goto geek Greg from themakerslife so he can ponder this with a clear mind.

[@richsjt4021]

Usually there is a common mode inductor between the switching controller and the motor. The brushes can overheat, there is usually a setting to reduce the current when in holding mode.

[@Alacritous]

This is an excellent video. Made me aware of other options for a project I have in mind. Thanks for that.

[@designandbuild3953]

You Sir, are expanding minds and changing lives!👍

[@gnarthdarkanen7464]

You know, Jeremy... I've been scavenging parts and fabricating or "re-engineering" stuff for years. I've known what I was looking for most of the time based on what I was LOOKING for. It's nice to find out (finally?) what the hell it's called!!! Thanks, and keep up the good work. You're probably going to be a great litany of reasons I don't light myself on fire as often as I used to. ;o)

[@tedhaubrich]

Wow, I had no idea that was possible. Very cool.

[@mark7wenning260]

Great video Jeremy, I'm going to keep my eye out for discarded treadmills. I would definitely wire up an external fan - the motor was obviously designed to pump air through it when it is running. Try running it in "hold position" mode for a few minutes and I'll bet it will be pretty hot. Can you measure the amperage going through the motor?

[@hamjudo]

With some fancier motor controllers the hold current is a configurable setting. With some systems it has its own g-code commands.

[@videotracx]

When it comes to anything about a Electric Motor or controls Jeremy's videos on KZbin is my choice as #1 first source. I believe it would be important to have a fan that runs the same speed no matter how fast or slow you run your motor. That means it doesn't necessarily have to be connected on the same shaft. Maybe use a separate independent fan that has it's own motor. Thanks for the videos.

[@Eaglebird]

There will always be pros and cons to each type of setup, but the cons are probably the more interesting, so: Startup torque on steppers is generally higher versus pmdc motors pmdc motors are generally not linear and require feedback (the encoder ($$$)) whereas steppers can be "dumb" rotor inertia of pmdc motors is generally higher than that of a stepper, possibly resulting in overshoot if not tuned pmdc motors aren't as 'nice' as steppers at holding a position / not being back-driven The video was great though and you offer a relatively simple solution; I have a few treadmill motors lying around myself.

[@grandmasterchody]

I hate that videos like this aren't at the top of the list when searching

[@steelcannibal]

Dude you're a BAMF! Only recently found your channel and I'm loving it! Wish I had you as a teacher! Keep up the great work man! ❤️

[@280zone]

There you go again, explaining things I never thought I would understand, thank you.

[@ColinPittendrigh]

Thank you Mr Fielding. Jeremy. Make me smile.

[@JonPrevost]

Don't let the DC brushed motor sit in a vibrating condition. It'll just heat-up. A deadband should be programmed into the controller to give it more wiggle room to sit un-powered. Either that or turn down your derivative and proportional gain while keeping integral wind-up to a minimum. Lots of information available online. Another advantage of running a servo system with a motor that has such a high duty cycle available is that you can over-volt the motor! Check the insulation rating but I'm pretty sure you can over-volt for better acceleration for such a heavy rotating inertia. Good luck and thanks for posting these videos. They are great for spurring interest in robotics and controls!

[@frankiepezzolla]

Brother excuse my language, But you are a fucking boss, your knowledge is a breath of fresh air in a world of air heads

[@michaelbadsyn1793]

Okay, well this was all way over my head, but hey, it was fun while it lasted!

[@connecticutaggie]

Hi Jeremy, love your videos. I agree that a Servo Motor is just a motor with encoder feedback; but, using an induction motor may be stretching that a bit far. Let me explain First, to validate my experience a bit, I am an MSEE and in my previous job I did high speed Servo Motion control systems - ground up (we did our own amplifiers, electronics and control). Second, lets talk feedback. There are two primary ways people do servo feedback - position or velocity. Velocity is easier and is sufficient in many cases, and will likely work with an induction motor. The biggest limitation on velocity control is you can't do accurate positional moved - like for a CNC. For that you need to do positional control. For positional control you need a motor that can drive both directions and can produce holding torque. That is going to be a problem for a AC induction or brushed DC motor. Neither of those can produce holding torque. Third, I am trying to keep this comment short and still accurate so I am trying to choose my words carefully. The whole discussion on Servo Motion control has a lot of subtleties.

[@Askjerry]

I had wired my monster mill with the Gecko servo drivers, they say that they are rated to 80v DC and up to 6 or 7 amps. What you NEED to be aware of is the total wattage that they can handle... in the case of the Gecko drive, that is 100W maximum. As my motors were running 55vdc and 3 amps max, I was well under the 80v, 6a limit... but 55 x 3 = 165W maximum. Most of the time the machine was under the rating, but many times it spiked over the rating so after a year I blew out two Gecko drives. I ended up switching to steppers as they run full power all the time and have not had any issues. I now want to rewire a PUMA robot where the motors are 24v with an absolute (fused) current of 4A (96 watts) so I am looking for alternate drives. (6 Gecko drives are $690.00 USD) I subscribed and will see what you are up to. Have a look at my Monster Mill or my Frankenlab series and let me know if I can help in any way.

[@AustrianAnarchy]

RJ45! Wow, I actually knew one before you got to it, LOL! Rare in my experience here. Back to learning under Niagara Falls of info.

[@7856173]

look at Goulds water pumps VFD for residential wells. They seem to have a 230 volt single phase ac vfd

[@lowelllogerwell5146]

This is a great start! I would add fan cooling by separate electric fan, a reset that only affect the motor and a motor or spindle lock could get this maybe 30% of the way to a DIY CNC lathe! Just add a couple of stepper motors to control cutter X and Z would get the basics covered. Thank you for this video. It has got me thinking about what to do with my treadmill motor!

[@hansdampf2084]

A brushed motor will be working not long in this usage, because of the high currents everytime it stops and moves on. Especially by holding a position

[@kevin00861]

what do we think ? We do think that you are an amazing engineer, please keep posting more great videos

[@tonyarcus]

Hey nice to see you on smartereveryday way cool

[@researchandbuild1751]

I think that motor is fine for the application. It just needs PID control, which Mach 3 isnt giving you. Thats why its buzzing the motor. A PID could be tuned to decelerate the motor as it neared its destination, etc.

[@stuarthossack7906]

Hi Jeremy, are you self taught or an academic? Either way I could sit in the corner and watch you work all day (nothing weird about that is there??!!!) Respect from the U.K.

[@EdAgers110]

Stuart Hossack If it IS weird, then there are a lot more of us “weirdos” that would be sitting in the corner with you, watching Jeremy all day long!

[@tigerseye73]

I'm impressed that you could use a large generic motor for precision ( more or less ) control of speed and position. An actual servo motor is carefully engineered for lowest possible inertia and precision balance to stop on a digital count. I believe that is why they are so expensive. However, if the application doesn't require star ship navigation through space and time, then the setup you have here may be justified. I always enjoy your experimenting video's. You are a bright young man.

[@samanthamonaghan7579]

Science is awesome and this is science, hypothesis, experimentation, documents.

[@azizaza8287]

Yes unlike our stupid scientists nowadays where they only give us ideas and irrelevant theories trying to explain everything and take tons of $ without any real result or proving experiments Hating science without experimenting prove ☠️

[@monoshock57]

You have good brains.

[@electronic7979]

Nice project 👍

[@DACProVid]

And just 2 days ago I almost got a treadmill that was being thrown out so that I could grab the motor.. Didn't do it, and then someone else got it.. Thanks for the video - great stuff.