/diy/ - Do It Yourself

>>1946029
I used to work on a delta with a 1000mm buildplate - about 8 square feet, pic related, behind the racecar. You'll need a good extruder to fill that build volume, I'd recommend a V6 Volcano at the minimum but the newer Supervolcano might be better. 40mm3/s extrusion volume flow does wonders for building big stuff quick, and I managed that with 1.75mm filament.
Next printer I'm working on is going to be 40 square feet (2,5x1,5x1,2m) with a dedicated pellet extruder. Filament just can't keep up.

>>1878997
>>largest repraps are kossels
OG Kossel is only 170x240. The biggest delta I've seen working decently was an AC Predator, which is only 370x450. In the back of this picture you can see a T3000, which is 1000x1450mm, and it most definitely not a cheap delta, nor does it lack torque with it's Nema 32's, nor does it use cheap drivers. The only delta's i'd recommend would be as small as possible, because they really are allergic to hotend mass and the smaller the better. The AC Kossel seems like a decent fit, especially with it's linear rails, but it uses the same crap autoleveling module that comes with all of those AC units. Then again, what does that thing do that an Ender can't? A bit of speed? Who cares, fit a bigger nozzle and off you go.

>>1760452
Given that said uni might be paying my wages in a few weeks time and most of what I'll say will be unkind: yes, I do mind.

Process was printing an ''internal mold'' in three pieces, then covering it in carbon fibre to get the rigidity required for crash testing. Results were not satisfactory, not because of the design of the composite layers but rather due to an oversight in the car's construction.
V2 was supposed to be printed a year ago, with CF-filled nylon that would not require any carbon fibre cladding. Not gonna happen anytime soon though, design work is slow as fuck thanks to bad management.

>>1611363
We're another Dutch team, the first with a 3D-printed monocoque - you can probably guess which one. Pic related uses a 3D-printed PLA sandwich core which was then laminated with CF, the next monocoque is going to be printed in CF-reinforced nylon, so it's going to be all-print - no laminate! Sadly, it won't run this year in FSN, which is a bummer given all the research I did into making a monocoque without laminate.

3D-printed materials have the same directionality, the only reason companies aren't doing serious testing is that the sales volume isn't worth it (yet?). Some are doing it though, for example:
>https://www.innofil3d.com/wp-content/uploads/2016/05/TDS-Innofil3D-ABS-160609.pdf

>>1577835
>Carbon fiber sheets are cheap and forming them is child's play.
Forming them into 3D isn't as easy, especially if your suspension pickups need to be accurately positioned. Fancy designs are hard too, and then you get to certifying the rollcage - you need a stifness equivalent (Flexural rigidity or EI) to three steel tubes.

>>1577875
Pic related is last year's car, which is a 3D-printed base shape which was then laminated with carbon fibre. This year's car is completely printed.

>>1577919
It's going to weigh about 15-16kg per square meter of monocoque, so about 50-55kg total. Not that heavy for a complete chassis in the broad scope of things (although not at the peak of the competition), but it is a very, very heavy print. She thicc.

>>1577952
Shields are great, being in the other room with your hands on the emergency switch is even better.

>>1578238
Hey now, our parts are more structurally sound than a Renault front wing.