Quote Originally Posted by Ocracoke View Post
I can tell you from experience that Polycarbonate is fairly resilient but it does crack under pressure if it is hit in the right place. Typically, this is between hole to hole because Polycarbonate is notch sensitive, meaning where you drill it, it becomes weaker around that area.

The method of attachment you are talking about sounds OK to me. I tend to run a big bolt through a bottom panel of Polycarbonate through a block material (in my case, steel box section but a thick block of HDPE will work) and then a top panel of Polycarbonate and bolt it all together with a compression fit.

Done right, Polycarbonate is a good, strong material to work with but I wouldn't exclusively build out of Polycarbonate. I tend to pair it with HDPE for the sides for spinner impact protection and a hard material, like steel, to build a body out of. I'd be happy to show you Azriel or Jibril if you are going to EXR Cheltenham.
Thanks for the info! I didn't know it could crack like that! I shall have a redesign and see what I can come up with combining the two. I'm not building it till the end of Robodojo 6 so would love to see your robots down at Cheltenham! Look for the idiot in pink :P

Quote Originally Posted by Roboteernat View Post
Your meaning the barrel nuts or Cross dowels, https://www.screwfix.com/c/screws-na...els/cat7280106

Polycarb is good across larger flat surfaces, but around holes as mentioned above, it is weak and can crack across on impact. My wheel bearing holders are machined from polycarbonate, and on large impacts (shrapnel and arena roof) the plates cracked straight across the holes.
I believe Killerhertz suffered quite a bit from cracked panels from mounting holes?
Thanks mate Yea they are the ones! So if I was to add polycarb, I would do well to have spares xD Ill have to have another nose around at ER Cheltenham and see what others are using. I know Tom from Mad Catz Robotics said he uses the barrel nuts for his wedge!