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Great ideas, thanks bro..

Pausing at 29:30 to go fetch some good-ass watah made me refrain from simply repeating the positive sentiment in the comments-which I share, naturally-as the still frame allowed me to notice that cardboard-augmented (if not entirely cardboard?) furniture. Brethren in Effective Hoarding, we are. 🫡 One of my creative life mottos: "Hmm, dang it... should I trash [[random object or normies' waste]]? Kinda makes a good piece of stock. I'm 42% sure I can fit it somewhere."

Muito bom mano, tambem estou com um monte desses motores de passo retirados de impressoras antigas, ainda nao testei eles.

Wow, this is amazing. So thorough and still interesting throughout. I’m impressed. And I have never seen a French creator with perfect English. I just assumed you had to be Canadian. Well done!

thanks for cogratulating me on finting the one frame that was not censored. i appriciate that

How about you make a cnc machine capable of milling steel?!

Quero mais vídeos traduzidos

Olá sou brasileiro gostei do vídeo

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Since you were already doing this over multiple weeks, you could have gotten Trinamic drivers and used Marlin or Klipper so that you don't have to code as much.

This is a nice and simple circuit. But as simple as it is, it is crazy electronics, because every active device in this circuit is operated out of spec. The BJTs are operated in avalanche breakdown regime, because their base voltages go down to voltages far below ground level. You can simply solve this issue by the use of MOSFETs instead of BJTs. The MOSFET is switched unnecessarily slowly due to the 100k gate resistor in combination with the gate capacitance. This leads to unnecessarily high switching losses. The gate capacitance often reaches the nF range. In fact you don't need a gate resistor at all, because the astable multivibrator itself has not really steep switching edges. This is also the reason why the 555 timer is not the worst choise because it can switch in the sub-microsecond range. Furthermore the PWM switching frequency can be very important, especially if you switch inductive loads. If you use a too high frequency you can find, that a motor will not start at all because the motor inductance allows not enough current to flow. And at higher frequencies the switching losses can become dominating over the Rds_on losses of your MOSFET.

Attend, tu est français ?? Ton accent na pas dutout l'air français 😂

Hoş geldin kıral gözümüz yollarda kaldı

Thank you I learned a lot from these 51 minutes.

I like the amezing video 😊😊😊😊😊😊😅😅😅❤❤❤❤😂

luigi

Characterising your re-wired motors seems like the height of pointlessness.

A lot work! Thanks for share.

I started out watching this video thinking to myself, " 50 minutes , no way I'm gunna watch this whole video " . Boy was I wrong. Super hard worker. Well Done.

Next time try with thin aluminium foil instead of the sewing thread , works well ..

37:57 was worth the price of admission. I'm guessing this is probably THE most common cause of gnarly VFAs, BUT this would have to be pending similar testing with a less crappy stepper driver to eliminate the control variables.

Get Klipper running on that bad boy 😉

What is the idea behind the annoying elevator music in the background?

great work

Your a hero. and this is so interesting! so now im going to take some of this into consideration!

дружище привет я думаю в твоих тестах слабым местом мог оказаться драйвер шагового мотора лучше бы ты его заменил на TB6600 он не дорогой и еще побеспокойся об экранировании проводов поскольку довольно часто именно пропуск шагов и нестабильная работа это помехи в проводке

Yay, nice test. Now do it again with a TMC2208 driver. 😀BTW: your motor mount plate could be optimized with dowel pins. This way you can remove and re-insert the plate with repeatable results. The advantage is you do not need to remove the whole assembly, just the motor plate.

Btw I love "chronic burnathing"😅

Hi Benjamin! Surprisingly the topic is pretty interesting, not boring at all. I watched it on RUclips on TV and didn't interrupt ads to help you, modestly, get some cents from your hard and instructive post. Using a laser and photos to evaluate stepper motors, is IMHO a proof that you're a real engineer with natural reflex like designing your own tools and measurement devices. Those 51 minutes are consistently useful to cover the purpose. Keep it up Benjamin! Btw your workshop has been through good lifting... I hope it sounds English 😉Merci Benjamin! On attends tes posts avec impatience et les prises de vue et le rythme de tes vidéos sentent de plus en plus professionnels. Il y a certainement beaucoup de travail derrière. Bonne continuation Ben! Le coup du laser est génial malgré quelques difficultés.👍

What about stepper motors in CD W/R units, aren't they small enough?

Wow! That SMD tip is genius.

I had just been wondering what kind of precision you could get out of all thread as lead screws in the past few days. I had no idea the thread tolerance could vary THAT much hahaha. At first I figured you meant you accidentally bought 1.0 and 1.25 pitch or something. I guess at the very least you'd want to do some thread verification before use. Oh, you say that at the very end. If the pitch is truly consistent along each rod, doing the math to compensate between them would be fairly trivial. I get not wanting to do that and having to use dual motors though. It was cool to at least see the machine run at the end!

cheap components tester/lcr will tell you motor impedance, if that helps

I'm not sure you can really measure with accuracy the current a motor will use just by measuring its resistance in Ohms.

The visual representations of microstepping here are incredibly valuable and useful for teaching. There are graphs of this on some company websites for example, but they don't really show the deviation quite so clearly. This really shows the massive impact current and voltage can have. Also surprising how well some of the generic motors did. This was a super fun video to watch and thanks for all your work. Shared with a bunch of friends. I do have to ask, what the heck is your accent? Deep Canadian? Thanks again!

Man i love the process here! something ive wanted to do for a while but you actually done it!, excellent pacing and info

The epson printers used 32-40 volt power supplies so i think those steppers were made to run at higher voltages.

0:42 congrats

I think the step spacing being affected by current is because of detent torque; without current the stepper rotor tends to lock into alignment with the permanent magnets in the stators. You can feel this if you turn the shaft when it's not powered. So when it is powered, the torque that's being generated to get the rotor into position has to fight against the torque from the permanent magnet trying to get the shaft to lock into one of those positions, and at lower currents the ratio between these two will be lower, so the detent torque is more noticeable, while at higher currents the holding torque is larger and effect of detent torque is less noticeable

real DIY

It's the cogging force.

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Fascinating! So if you overclock the steppers you should get more accurate steps and better prints? by overclock i mean add more current, maybe add some cooling so you can without overheating. That would be cool. Sorry im not an engineer and cant consult you on these problems but I have been learning on the youtube home shopping network and zoyi makes a nice inducantance tweezer meter, maybe if you reach out they can send you one. I mainly got it for the better resistance resolution vs multimeters, only like $30. It was handy to test my homande inductors and see how a core affects them. That being said ive been learning a little about motor control, just to see if I can make my escooter motor spin. And theres more ways then just PWM, Chatgtp was talking about FOC , field oriented control, a fancier way usibng derivatives which is more efficient, smooth across a wide range or loads etc etc, used in high precision robotics and industrial machinery. So why are we using stepper technology we were using in 30 years ago today? Linear motors... thats the future, basically a rail gun axis, your toolhead/hotend moves like a magnetic train. I think the difference is that its a closed loop system, using encoders to know its position like hall sensors, unlike steppers which use an open loop system, relies on the built in steps to know your position which cant be as good as using a magnetic field for fine control i think. Your steps are only limited by the resolution of your ADCs at that point. Anyway these stepper motors are good enough i suppose but are they really, we still dont have printers that can stack layers prefectly on top of each other. Why cant we have some kind of closed loop system on the Z axis, to compare to the actual position and adjust so youre go exactly straight up. This feature would be built into linear motors, but if you have to use steppers, you could still ad a closed loop control to make sure the motors steps match up with the actual position in real space. Youd just need magnets on the axis that moves and read hall sensor values and know its exact position and now youre steppers can get to the right spot everytime, instead of relying on accurate steps. But its cool to see them get more accurate as current increases, so just add more powa! work harder! not smarter! jk (do the opposite ;))

BTW, your method of testing with reflected laser and long exposure pictures is very clever, nice job. But man you talk a lot....

4:25 OH NOOOOOOOOOOOO, Do not remove the rotor from the stator on stepper motors, that will irrevocably ruin them and render them useless! Stepper motors are magnetized after they are fully assembled.

i'm 90% sure this microstep bunching has more to do with A4988 being garbage, than motors being bad..

Thank you for this, I need this for the Robot with friend's project. also we were learning in the university. Many thank you.

"Run at as low a current as you can" is basically a direct admission that the person has no clue what they are talking about and has never in their live bothered to actually read and follow the spec sheet. Stepper-motors are designed to be run at a constant current - and to run rather hot due to that. Even the cheap chinesium ones provide a datasheet with the needed information. In professional applications you will find something along 65% to 85% the current rating to be in common use (warehouse belt-drive often goes down to 65% cause there microstepping or accuracy is not needed - you just want to move some conveyor rollers to like 50° accuracy). Where precision is needed of course it also needs better parts and you get closer to 90%. (Not an electrical engineer - studied it, worked with them, still controlling them, but now exclusively on the software side... we still need to know how they behave)

I've a lot of this old stepper motor from old printers, than wait the next video for result!

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