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I’m a recently retired Design & Technology teacher and I first started making these with 14 year old students 40 years ago. It was a great way of them developing a “tool kit” of skills that would serve them well when designing and making their own coursework projects. I started with brass, but transitioned to casting the barrel and wheels in aluminium to bring in, even more processes and techniques. Sadly, this level of work is no longer evident. However, some of the work that the students were doing at the point where I retired using CAD/CAM, Systems and Control and Electronics is equally challenging.

To quote Mr Spock "fascinating". Well done, beautiful result 👍

Very good and detailed video. I spent ten years correcting engineer's in NPI and DFM reviews as they often get the ISO tolerances wrong. They'll accidentally define a slip fit when they want a press fit, or the opposite. Sometimes I felt like my title should have been "FIT reviewer".... I don't know about including the tolerances and double-dimensioning the print, I might consider putting H6 for example and then in reference the tolerances in a digital format example "xmm H6 (+xxx,-xxx)" One thing engineers often don't see though is that the ISO metric sized reamers are sometimes a little harder to come by within the tolerances. Additionally, the ISO fits are often require metric gage pins, and this increases cost. They are also tighter tolerances than is needed in some circumstances, and this requires more expensive metric gage pins that are more accurate. So be sure to check that the tolerances of the fits are practical to your application. Engineers would ask me, why does it cost X amount of dollars? Well, I have $2500 in gage pins to buy to guarantee your specific fits. If I could use a standard inch pin on file, I could use the pins I have in stock and the reamers that are easy to find. Generally, in this case the machinist ignores the tolerances, measures the pins, and uses an inch reamer and press fits (or slip fits) according to either a general rule of thumb or inch tables in the machinery's handbook. One thing machinist's know is, especially on a press fit, you can't measure the hole after the press fit is made. The other thing to consider on pressfits is the impact of thermal expansion on your part. If the press fit is too loose and your parent material is something like aluminum, the pin can fall out. This is important to pay attention to the press fit in heat applications. Depending on the material, the pin often has a lower CTE (Coefficient of Thermal Expansion) than the part material. So when your part heats up and grows, the pin stays the same and falls out. But CTE is a different topic.

Best explanation of fits & tolerances I've seen in the last fifty years.

This was a great video, thanks very much.

😂 some body! see him extrusion shcnek

How I chose the secrew dimensions

Its QIUTE ! AMAZING ! How many ! You Tube THIEVES ! You have !

Phew! That was like drinking shandy from a fire hose! 😮 Great video, packed full of details, thanks for sharing! ❤

😊

How much for the Kit?

playback speed at 0.75x is much better for this. Thanks me later.

Saludos desdes Ecuador, como quedo el proyecto de la mini inyectora de plástico, exitos

Great video! Can I ask for your reference document when choosing fitting tolerances?

You made a good video and explained well, but man you go to slow it down, you can't even catch your breath! lol Cheers!

Whatever happened to the Plastic Injection Molding machine?

they cutter marks you call set screw dimples are from the bottom of end millmbeing dall

Video about polychain carbon belts and noise at high speed. These belts are 98% efficient and very long life, better than a gearbox i would argue.

Basically all modern machining is referenced to in either "inches per minute" or "inches per revolution" or the metric equivalent "mm per minute", or "mm per rev" Something to keep in mind for your final revision

is that pawl and screw rigid enough? it takes most of the cutting forces after all.

Hello everything is fine? My name is Everton, I'm from Brazil, Campinas - Sp, I would like to know if you can send me the CAD for this project, so I can execute it here.

I refuse to heed you're results. As soon as I can get ahold of several 45 lb plates. They will asap be attached to a homemade kinetic wood splitter that's been on pause for a while because I don't plan ahead or think things through when i get a idea..

those are some very unconsistent sounds.

super useful video, thanks!

Excuse me, sir, do I get it right that CNC lathe has never been completed?

Clamping on the left

All moulding machines have the injection on the right and the clamping on the right.

This is amazing.

That’s why we ship to a cross border address and never, NEVER use UPS to cross the border!

This is good wher can i get it

You need to put grooves in the pulley to reduce the noise?

I just want to know how to convert old machines into new controls/software, they're cheap and plentiful....saving them from the metal reception...

CAN Bus is a great choice for board to board data, however youd have to have a controller on each board.

Pca9600 i2c extender ic to communicate up to 100mtr

👍👍😎👍👍

These videos are both very insightful and entertaining. Thank you 👍👍😎👍👍. I look forward to every episode

I have successfully used I2C over Cat5e by making it differential. There are some chips specifically designed to allow this. The PCA9615 is a good example. Great video, keep up the great work Greg

The fcc is stupid

Aren't those switch and screen a little too small? Or is it actually bigger than it looks?

13:19 But why are you trying to use a $50 end mill to replace a $100 portaband?

Great device.

you could totally throw a second micro there for the price, btw. There is no kill like overkill.

oh the pains of long distance i2c...

Instead of running I2C over long lengths, look into using RS485 transcievers and just run plain old uart comms over it.

The connector is called DE-9, not DB-9 - A DB-9 would not make any sense as only having 9 pins in the shell size B that can house 25 pins is silly and pointless.

1) order flexible pcbs and flex cable. 2) profit

I realize it's a WERID question, but IIRC creators can see if someone has commented before/what those comments are. Have I commented on any of your videos before this? I am subscribed, but i have NO memory of ever seeing any of your vids... Was wondering if maybe YT just black holed you for a couple years, or What? LOL

Super cool to see this partially working and making chips. This project reminds me a lot of Clough42's electronic lead screw. You might find some useful info by checking out his series in that project if you haven't already.

I think first I would try some Cat 5 or 6 cable for that interconnect. I use a multi-conductor shielded cable for my CNC connections but it is more expensive and uses DIN connectors $$

Really like that stainless steel case