Robo Carbon Fiber PLA

Looks.good.glad.to.see.someone getting good results with the robo brand

 

Those are good looking prints.

I do have to say, and this is just a personal opinion, since the CF amount is so low in these filled filaments (generally less than 20% by volume and closer to 10% on cheaper brands) using PLA as a substrate would not be my first choice. Colorfabb uses PET-T as a base, eSUN uses nylon as their base and there is someone else using PET-G as theirs (can't recall who at the moment). I know all these other blends cost more, they will also likely specify the amount of carbon fiber by volume. Anyone that doesn't should be suspect. The Robo filament at 15% is not bad, I am just not a big fan of PLA as the medium to deliver it.

 

100 people surveyed, 100 different opinions. The more popular filaments on this board are Hatchbox and eSUN. Many use JustPLA or JustABS. For nylon filaments there is almost no one else other than Taulman as they have so many blends, eSUN only has one nylon filament. Colorfabb XT (PET) and XTCF (PET filled with Carbon Fiber) are supposed to be real nice also.

 

I like to use plastruct plastic weld for an adhesive, but I'm not sure I would be willing to put a high $$ part way up in the sky with glue alone holding it in. Looks like your joints are screwed together as well though and printed in a high strength orientation.

The Robo PLA looks nice, but you may want to check out some of the other alternatives for strength and toughness. Particularly over time. The Protopasta Carbon fiber PLA High temperature can be annealed so it will be fine in the sun. It's also quite a bit stronger than standard carbon fiber filled PLA. However, any PLA based material will degrade over time and become more brittle. We're talking many months into years here, not a few weeks. So, for more durable parts over time, something like the colorFabb XT-CF20 or even the CF filled nylon at 3D XTech can be a better choice.

Also, to clarify, not that it really matters that much since you can get such an extremely wide variation in properties, but XT is more like a PETG than a PETT. They've dropped the PET from any of the descriptions because XT, HT, and NGEN are all PET based but with dramatically different mechanical properties.

 

This is a really good choice. We used it on some Quads. Alloy 910 worked very good as well.

 

@KTMDirtFace Could you imaging a 3D printed quad or hex with an improperly balanced prop vibrating enough to explode the parts in mid-flight. There are just some things that shouldn't be done with a 3D printer.

 

I have tried to print props... briefly.
With an FDM it is not really worth bothering. The structure of the quad -- yep. We have made a couple of interesting ones

 

@m4r1n5 I don't have any kind of answer for you.

 

XTC-3D or some other sort of epoxy will help.

 

If your problem is not specific to Carbon Fiber PLA I would suggest starting a new thread/post in the appropriate section (like troubleshooting) and make sure it in the correct sub-forum for your printer type (R1, R1+, R2, C2, etc)