- 8
- 54 635
Is it Science?
United Kingdom
เข้าร่วมเมื่อ 24 มิ.ย. 2021
In this channel I share my small projects around science and technology. Making stuff, repairing stuff, understanding how it works and how to make it better.
Converting a mini mill into CNC
The video covers the conversion of a mini mill (such as Sieg, Little Machine shop and many other vendors). The files are available as CC BY 3.0.
Part 1 - conversion of the main mechanics to make it work but far from perfect.
The model at grabcad - grabcad.com/library/sieg-mini-mill-into-cnc-conversion-1
Or as fusion / STEP files - drive.google.com/file/d/1TlrGAmpKUnPV5zbhUXAa2twQXYZNf7z-/view?usp=sharing
Parts:
00:00 - Why bother?
01:00 - Plans
05:19 - Motor holders
06:24 - X & Y axes
08:21 - Electronics
16:14 - Z axis
20:52 - Z problem
24:12 - Steppers & Mach 3
30:13 - Does it work?
Part 1 - conversion of the main mechanics to make it work but far from perfect.
The model at grabcad - grabcad.com/library/sieg-mini-mill-into-cnc-conversion-1
Or as fusion / STEP files - drive.google.com/file/d/1TlrGAmpKUnPV5zbhUXAa2twQXYZNf7z-/view?usp=sharing
Parts:
00:00 - Why bother?
01:00 - Plans
05:19 - Motor holders
06:24 - X & Y axes
08:21 - Electronics
16:14 - Z axis
20:52 - Z problem
24:12 - Steppers & Mach 3
30:13 - Does it work?
มุมมอง: 465
วีดีโอ
Main methods for car security: how they work, their strengths and weakness
มุมมอง 70ปีที่แล้ว
4 main methods for car security: how they work, their strengths and weakness how it worked in my old Kia. 00:00 Introduction 01:18 Physical key 03:03 Key RFID 08:00 Keyless Key Immobiliser 15:00 Passive keyless 18:47 Key in my old Kai 22:39 Conclusions Cited papers: Dismantling DST80-based Immobiliser Systems. Wouters, den Herrewegen, Garcia, Oswald, Gierlichs, Preneel. DOI: 10.13154/tches.v202...
Как свалить из России? (Академическая карьера или PhD)
มุมมอง 2502 ปีที่แล้ว
Моё субъективное видение о том как найти работу в иностранных университетах (и не только).
No more sandaper - use electricity to polish metals. Electropolishing: how to use and therory
มุมมอง 36K2 ปีที่แล้ว
In this vieo I talk about a 70-year old technique of electropolishing. I discuss the way to polish complex shapes of stainless (iron and nickel alloys). The first time I took a research paper, selected the simplest method and it worked. You could read a few papers on more complehensive methods and therory below: (review, mainly methods) www.mdpi.com/1996-1944/13/11/2557 (comprehensive theory) w...
Making precision washers on a mini lathe
มุมมอง 4403 ปีที่แล้ว
Turning high-purity silver sheet into precision gaskets (or washers) on a mini-lathe. Contents: 0:00 Motivation and previous fail 1:19 The plan for the jigs 3:31 Making the driller body 8:20 Making the barrel 16:02 Punching the sheet into blanks 18:22 Drilling the washers 22:33 Turning the outer diameter 26:16 Results 27:18 Conclusions
Simple, local, and precise metal analysis - random metal bits no more!
มุมมอง 2083 ปีที่แล้ว
I discuss a recent find - a simple method for analysis of metals using a soldering iron, and a multimeter. The analysis is based on the Seeback effect I used to verify that Hastelloy equipment is really made from Hastelloy without any welding errors. This method works well for other metals and could be used (with much greater care) to distinguish even various grates such as 304 and 316 stainles...
Making a multi-axis CNC pendant based on Arduino
มุมมอง 7253 ปีที่แล้ว
In the video, I share how I made a simple CNC pendant. The pendant is designed for 2-axis for a lathe. Yet, using the Arduino code, a microcontroller, and several rotary encoders you could make a pendant or as many axes as you have - milling machines, laser engravers, etc. The Arduino code and box for 3d-printing could be found at github github.com/cherkasovn/Multi-axis-CNC-pendant 0:00 Why mul...
Simple conversion of a mini lathe into CNC
มุมมอง 16K3 ปีที่แล้ว
I show how to convert a conventional mini lathe (sold under various names such as Sieg, Grizzly, Aximinster...) into CNC. A first step - a workable lathe with limitations to be improved. 0:00 Why CNC? 1:27 Conversion overview 2:15 Z-axis conversion 4:47 X-axis conversion 6:45 Electronics 7:24 Making custom holders 8:11 Test machining CAD files in Fusion and STEP: drive.google.com/drive/folders/...
Винт швп ?16
1605 ball screw
@is_it_science спасибо
Which acid you used here
Can I have your email address
Hello , it this method suitable for gold and silver polishin , wich is the recommended electrolyte for doing this process???
Its work for gold
how do you clean the pieces after acid bathing? I mean after the electropolishing process how do you remove the acid from the pieces? just with water?
Baking powder and water this will neutralise the acid 👍
@@kxng5703 I believe baking soda is far more effective than baking powder.
I dont think having the ballscrew offset on the X axis is helping accuracy very much. Id prefer to go for a smaller ballscrew mayber 10mm or even 8mm and run it through where the original leadscrew was. Your mounts also dont look very rigid at all. You need solid couplers and I think a better option for mounts would be thicker aluminium plates supported by 4 pillars. All this could be made on the lathe fairly easily without the needs for an external supplier.
You may be right. I did put 12mm ball screw later and it got better. Yet, it is possible to put it beside, but you require a hugely more rigid connector.
are you russian?
sulfuric acid can't be purchased in EU, is there any alternative to it?
You can buy it - it just need a bit of hassle and paperwork. It is not hard at all. Regarding the alternatives, please read the review in the video description. I haven't tried these though...
Greatly done...!!!
thank you for this valuable info
Would you also be required to strategically place electrodes inside diameters?
Somewhat. In my experience, sizing and positioning may be important but margins for errors are huge. Just give it a try.
Excellent, this is very useful, 45 year in engineering and I have never heard of this. I am using using a lot of 316L and Inconel alloys in various state of oxidation, this will give a brilliant way of discriminating between them. Thank you.
nice video thanks
Isn't this just electroplating but in reverse?
Exactly, it's the opposite of electro deposition
Which software are you using for send commands???
Mach3. I suggest looking into Centroid acorn. That one could do real-time control and is much better supported than Mach3
Wow. This is absolutely awesome, I can actually use this. Thank you!
Nice video. Better than most websites I can find. I've been playing around with polishing some screws and washers. It's hard to get consistent results. Often the surface looks bright but under a microscope it becomes quite bumpy.
Thanks. The results also depend on on the way the part is connected to the power source, its geometry and many more
@@is_it_science it is very hard for me to get good results. I achieve more a matt finish, not shiny. I only have 12v supply 7.5 A and 5V with 1, 2 or 3 A. I think it depends a lot of the size from the workpiece. I have better results putting like eight rings on one go and not just one.
Thanks. High quality video. Hope you get more views. Very useful. You are a good instructor.
fumes (burning of sample is there while doing electro polishing ,,...what is the reason
The fumes are mostly electrolysis products - hydrogen and oxygen. Plus some dropets of sweet-sweet concentrated acid drifting with them...
or just dip into dilute KOH or H2SO4 water
No - KOH for stailness would not work. H2SO4 would not dissolve it either. And it you had something soluble, that would not polish it - only dissolve and make as rough as it was.
@@is_it_science what? Fe + H2SO4 -> H2 + FeSO4, and KOH will nicely etch stuff away, where do you get your knowledge?
@@is_it_science I think you are biased to your method judgement
@@Jkauppa I most definitely biassed. Yet, there are some matters I claim some knowledge about...
@@is_it_science dont claim, I dont acknowledge it
I think ALOT is lost in translation from Russian to English
Thanks. How should I have done it better - what is missing?
@@is_it_science Думаю большинству не русскоговорящих помогли бы субтитры. А так видос очень полезный, спасибо.
@@is_it_science Nothing is missing, sometimes you speak too low, that some words are far too silent, that one has to stop, raise the volume, go back and listen again, but else, you´re perfectly understandable, despite your english not being perfect. Your video is very structured, but not structured enough for a beginner like me. Some hints in the timeline, suggesting that the next chapter begins, and naming the chapters of the video (in the timeline and the video itself, with some name-card appearing), would make it even better...
hello sir ... is there any method for polishing gold objects ..?? please help
Eeeh. You are welcome to send me your pieces ... for a trial. You know, they could get dissolved... If serious, the same method shall work ok. Yet, beware that idem geometry could make polishing non-uniform.
@@is_it_science ;-) ;-) ;-)
Классное видео, очень конкретно. Буду ждать еще . Спасибо за нужную информацию.
What size stepper motor you fit?
Nema 24, 5A motors. I am not sure if it is an overkill or not
I will tell you a secret , 5:4:1 ... the 1 is Glycerol th 4 sulfuric and the 5 h3po4
can i use citric acid as pshopirc acid substitute?
@@dogodogo5891did you find out?
@NOBOX7 what is the purpose of the Glycerol? is glycerol and vegetable glycerin the same thing? I have seen others add 1-2 drops of soap to reduce bubbles clinging to the parts surface.
This was my favourite technique fro preparing aluminium sampels for metallography in my mat eng course - few % nitric in ethanol, a few volts, couple of minutes! done!
if used for metal gold or silver... how do we use it? thanks
Бро, расслабься и говори на родном
The electric field is stronger at sharp ends so in those spots the ionization is faster evening it out
25A / dm2 is looks like very high. Is it not typo error isnt?
Nope - it does need a lot of current. You may get away with less, but current is high
Great job. Thanks for posting.
Thanks. Yet, it needs quite a few improvements...
Thanks! Can the acid be reused?
i am also interested how often you would need to replace the solution in a small production environment (making ss bicycle racks)
@@muzzarobbo Can I guess that you ended up just getting an abrasive vibration tumbler?
This video is very good. Can you guide how to electro polish gold Which acid work for the process and what type of rectifier is need and power
Qual motores Voçe usou nesse seu projeto
very usefull video٫ tnx i have one question. for gold electropolishing wiych acid needs?
Very useful video, scientific, easily understandable.
That's amazing. Does it work for copper with the same concentrations?
Likely but you need some experimentaion
@@is_it_science I'm willing to try it. Thank you!
Thank you for the video and data. I'll try
Ого, понятно что с точностью. Надо подшипники конические в шпиндель. И шабрить все направляющие, планки и сопряжения разборные на прилегание по краске хотя бы. Просто ИЧ отгибы пружинным безменом измерьте относительно суппорта. Там будут десятки сейчас, вот оно и не режет. Надо хотя бы в сотку на 10 кг тяги уложить (а лучше на 50 кг). PS под станиной штатные ноги на профтрубу со стенкой 5-8 мм посадить (или 15-20 мм полосу), раз в пять станину саму гнет меньше.
Полмиллиметра это как то уж очень многовато. Наверное эти тонкие нежесткие кронштейны надо выкидывать? Ну или как то их большего сечения вырезать? Или поправок после контрольной проточки и измерений на паузе после неё хватит для нормальной точности? Только тогда код надо параметрический для машининга писать-генерить.
There are a few problems with rigidity for sure. Precision for soft materials is tolerable, but not for stainless...
very well made and clear video. please make more!
Thanks!
Great video, very useful for my planned conversion. Do you think it is worth adding a gear reduction system for increased torque? I'm thinking about using a belt and some pulleys.
Thanks James. Everything is possible, but I have not found torque a major problem. I would love to have a lower speed and higher torque, but it is easier to focus on what we have. Making noisy gears to me a bit too much effort for little output. What I want is a good rotation speed indicator (with 1/100 turn readings) and computer-controlled speed
Отличная работа! Мне нравится, как вы говорите на английском, я все понимаю, а других зарубежных смотрю, много не понятно
Понятно потому что по русски)
Thank you for this useful video! I was hoping there was a simpler way of doing this, but I think I'm going to have to follow your method.
I also tried to find anything simpler... (But let me know if you find something dramatically better - I don't pretent to know what I am doing)
Hello, would it be possible to get the drawings for it?
Thanks - I shared it but forgot to publish! Here it is drive.google.com/drive/folders/1tP2AdmLGwleweIU_Jka51ePjiDQ_FDx8?usp=sharing
What software do you use to draw and generate gcode?
Mach 3 to start with; then Fusion 360. And it took forever to understand how to use Fusion for G-code. Possibly, I shall make a video on this at some point...
@@is_it_science Yea, that would be awesome to see how Fusion gets gcode saved. I'm all new to this, and using UCCNC software instead of Mach3 and vcarve pro for generating gcode, Fusion 360 looks very hard.
Great video. But I think it would be easier if I just send you money and ship one to me, or fly here and build me one 😁
I would love to, but I am barely able to keep up with the other interests... It is surprising, why the Chinese do not do reasonably-priced CNC lathes....
Nice job sir