247zeroBETA2 : Motion and Extrusion - The Fastest Printer? (No, but it's cool anyways!)

Still not STl files. I want to print the foots.

Any news on this? :D

I wonder how complicated it'd be to belt a stepper to the top of the toolhead to get all the benefits from a direct drive extruder without the weight of the motor. You'd probably have to make a spring tension system because it moves around, but it'd help quality. Might even speed it up because better control over pressure.

Awesome stuff, just learning about it all now.
I'm guessing you've thought of all this before but just asking for learning purposes:
Would a stiffer frame not help at all? HBR25 rails or whatever CNC machines use?
What about a more sophisticated base / platform to minimize vibrations?
Maybe even some kind of active vibration compensation system?

Why don't people like racing clean benchies? Seems like just as interesting of a challenge and much more useful?

mi piacerebbe avere i piedi della stampante com ei tuoi, cosa devo fare per averli? grazie

What filament is that in the box being used ?

Great wedeo

This might be an ignorant question, but... why don't you just use the pathing of a 3D Benchy for testing? Scale it up if you want the printhead to move a lot more than a 100% benchy, but otherwise it has all the properties of what the printer does during a print.

Damn, amazing!

Love ur videos man, such great work…keep it up, it’s greatly appreciated.

I would love to test the circle speed file 😅

Is it possible to scale the printer and have the same type of speed? Build volume of 1000mm x 1000mm x 1???mm ? Also, what is the quality of parts printed at these high speeds and the durability? Love your videos by the way, subscribed to you channel and newsletter.

Omg I wanna build this little monster so bad... mount a Goliath / HextrudORT on it

Instead of steppers try servo, closed loop. Fit timing cog, fasten timing belt to chassis and see what speed

can't wait for part2

Accelerometers and an algorithm compensating for movements could greatly improve print quality.

I wonder if you could bowden high speed cold air into the print

An extremely informative video.

What do you work on aside from this type of Content?

I'm new to 3D printers in a sense - but I've spent a lot of time on design of military aircraft - they go fast in a different way.
I really appreciated the blend of discussion of the electrical and mechanical elements - having a bit of a unique education across electrical, mech, and material science I find this fascinating.

What I'd like to see is personal user trying to push resin printing to it's limits

Next upload?

Wow! Next, bolt it to a concrete floor and use input shaping.

Now make the fastest resin printer

Is your secret pla is low density pla?

Be nice to see the quality of your prints at a reasonable speed like 200/mms

As it seems part cooling is the most important part that is slow.... how about using evaporation to achive extremely fast cooling? Water evaporation is extremely fast and cant be beaten with air alone. A small piezo mist maker inside the head and micro tube (from a inkjet printer) that provides the water and on the backside of the printer a peristaltic pump that pushes very very little ammount of water to the piezo mister. This should give you extreme cooling ability's with the fans you already have.
What do you think about this idea? Yes there are difficultys like preventing the mist getting on top of layers where you want to print, but it might work even with that because the melted plastic is at at least 200C which means the water evaporates immediately....
Would love to hear / read what you think about this....

Schönen Abend. Frage: Wann wird Version A2/B2 als Model bereit sein?

Do you plan on switching to BLDC motors ? They are faster and have higher efficiency.

I half expect to see some kind of liquid cooling for the steppers to show up at some point. Just to see if one can squeak just that much more from them, I admit I have no clue how one would do it as I personally have doubts on those water blocks I have seen that just screw onto the back plate. Seems like one would need to get the sides of the motor as well.

The benchy is ugly but this is NHRA Top Fuel Printing, The whole idea is brute speed. after all you do not play at 11 for audio fidelity you do it because its one louder.

More phases for higher torque in the stepper motors might help right?

What do you think about a odrive to run the core xy with Servo motors?

Consol bed its very bad, in construction your printer have a lot of problems

what is the secret PLA

Albert, I got a question for you. I also got to tell you I stopped working my extruder I told you about. I was trying to solve a problem that didnt exist...Anyway:

Could you link me to the printed X gantry you used on the old 247 zero? You said you printed it out of PET-CF. I want to print that as a start for my 247 zero build, just because I dont want the price to shoot up immediately.

very cool!

200,000 mm/s acceleration is close to 450 MPH

Being behind on engineering is what makes you a GERMAN engineer. lol

In your opinion what’s the most important thing to keep in mind for a fast corexy (motors, speed, weight…)

can someone link me the macro to test acceleration shown on the video?

Beware of an "invisible" problem there. The umbilical breakout board. AFter lots of troubleshooting I found out my umbilical cable connectors were not as solid as I thought, especially the backside one which connects to the fixed oblong board. The issue is the continuous back-and-forth movement of the head, aggravated by the relatively short umbilical cable lenght, causing the conector(s) to undergo rather extreme tilting angles. That may cause brief interruptions in some of the cables. This problem is equivalent to introducing a randomized PWM in some of the cables connected to the print-head, generating all kinds of nasty consequences like faulty heaters, false temperature runway fails, lagging thermistor data and extruder stepper with unstable voltage/current supply. It is challenging to diagnose this problem in real-time with standard metrology equipment like cheap multimeters but you may be able to see it with the printer turned off, measuring the resistance of each connection while gently applying back and forth pressure to the each end of the umbilical cable. I just got rid of mine after all.

Keep up the great work loving the videos

It's not a Fail, my Friend.it's fucking fast. Sure, it just takes a quick crap on the bed, that resembles a Benchy in under 2 and a half minutes. It seems you just have to teach your baby not to crap on the bed. Did you consider to have lighter rotors in the stepper motors? Because what logical sense does it have if you increase voltage and current and the rotating mass is still the same you will get more inertia and therefore more time to spend in accelerating that rotating mass and decelerating that same mass. There are more lightweight rotors out there with low inertia but with the same torque. So called "Glockenankermotoren". it would be nice if there were those motors as stepper motor versions as well, ideal with Aluminum enameled wire🤔

" i might be a German engineer, but considering I'm really behind on my schedule" sounds like you might be an English engineer

This is me not asking about the secret PLA

When you're talking about the rated current of the motor, 1.68A in your example. It only means that it is the continuos current where the motor can operate without getting too hot. This has been set by the manuafacter and it does not count active cooling. So you can exceed the rated current if you are able to keep the motors temperature low enough for it to not break.
So in that sense exceeding the rated current is not a limit of your motors theoretical capabilities. The higher current you give to your motor the more torque it has. But when you increase the frequency of your pulses there comes in another factor that is inductance. Inductance (milliHenries, mH) tells how fast your coil is able to reach its maxium current. Let's say your motors coil achieves its fully energized state in 5ms. If your steps take 9ms each, the coil has time to be fully "energized" for 4ms. It is already less than half of the step at the maxium torque. When you increase the stepping frequency even higher for example 3ms, your motors coil has no longer time to be fully "energized". In the following example the slow rising of the current caused by the inductance is linear.
We can only reach 3/5 (calculated 3ms/5ms) of the maxium current each step. In this situation increasing the current helps because 3/5 of 3 amps is a lot more than of a 2 amps.
In summary choose a low inductance motor, use as high voltage as possible and make sure the current is as close to maximium as possible without destroying the motor. There's a good and short post about this if you google search "LinuxCNC Stepper motor inductance".

💪💪❤️🎉

Finally found it. The printer that extrudes brown "filament" faster than my ass.

Bowden extrusion like "direct who?"