Robak 2 | Pump Track Practice | DIY 4x4 RC Car

[@ygalion]

the fuck youtube is not suggesting those videos we have here... amazing stuff

[@robaki-dev]

Thanks man! 😉

[@a944734]

Same here, waiting for parts on the slowboat ;-) However, an exploded view of the V2! version would have been nice, figured it all out eventually :-)

[@robaki-dev]

I uploaded the .step file to Autodesk Viewer which has the explode feature. autode.sk/3AXTliO 😎

[@saritsotangkur2438]

Want to see it doing some bigger jumps. How high can it go before something breaks? How do we redesign the part that breaks to be stronger.

[@robaki-dev]

bad landings happen and sometimes printed parts break. If you can control car rotation in the air land on 4 wheels it should handle 3 to 5m jumps without any damage. I'm satisfied with the 3D parts geometry and I think there's not much I can do to increase their strength. I rather try to tune my print settings or change a material as they play a big role in overall durability of the Robak. And I'm going to make a proper bashing video very soon! :)

[@deniellemondesire7080]

Great design😎, can't wait to finish building it as soon as the parts gets here from China...😪

[@robaki-dev]

Thanks! The hardest part (placing orders) is over - congrats!

[@jessicajay2484]

nice!!!!

[@vamvam3353]

Install a camera and play it with vr👍

[@lucasvanhamburg4937]

nice logo ;) is it a shock tower😂

[@robaki-dev]

Thanks! The tower has been changed in the v2 because shocks geometry wasn't optimal. I couldn't preserve the original shape, although the logo stayed 😂

[@lucasvanhamburg4937]

@@robaki-dev ahaa nice. do you think flexible filaments could be used for the suspenson parts or would it compromise handling too much? I mean have you tried it out.

[@robaki-dev]

As for the suspension arms, if they bend too much on jumps/chash the drive axle shafts might slip out of the differential. PETG or PLA+ makes a good compromise. I tried PA12 and it worked great too. Taulman Bridge Nylon was too soft in warm conditions not to mention TPU or TPE. Flexible filaments can be used for printing the shock tower. I know someone who performs a lot of stunts, often lands upside down hitting and grinding the tower. Extra softness makes the tower last longer.

[@jessicajay2484]

i would like to try to build this RC, what are the non printable piece?

[@robaki-dev]

here is the bill of materials: github.com/robaki-dev/robak/blob/main/BOM.csv

[@jessicajay2484]

@@robaki-dev thank you so much!!!! i have dowloaded your file and i wonder, do i need t o build support before pinting yoru pieces?

[@Danumatube]

battery life ?

[@robaki-dev]

At least 25 minutes

[@Danumatube]

@@robaki-dev oh good ✔️✔️✔️

[@vtee549]

Cost? How much?

[@robaki-dev]

less than $350 ready to run with a decent ESC+motor combo

[@mikeuk2981]

Looks fragile I would not push it

[@robaki-dev]

if something breaks I print a replacement part and within an hour or 2 is ready to run again. Printed parts can be very durable, especially if printed from engineering filaments