Team MeltDown Build Diary

**Maxamuslead** · 20th July 2017, 16:00

nice. is it a local firm to yourself as it would be nice to who did it that's all

**Andy** · 20th July 2017, 17:02

Nice work so far Giles, is all the aluminium there 2024 then? Should be tough as hell

**Maxamuslead** · 20th July 2017, 17:15

Originally Posted by Andy

Nice work so far Giles, is all the aluminium there 2024 then? Should be tough as hell

also how much is it billed to weigh in at, as it was curious about 2024 and I found out it is 3 g/cm3 compared to 6082 2.7 g/cm3

**Giles** · 21st July 2017, 08:43

Firm doing the CNC is in Ireland, so not local, but he's a good guy.
@Andy, some of the internal mounts are 6082, the claw standoffs are 7075 and the frame is all 2024.

@Maxamus, Mantis 2 will be somewhere between 13.2 and 13.6 I imagine, CAD is saying just below 13kg right now, with small wiring bits missing. 2024 is 2.78g/cm3 and 6082 is 2.71g/cm3, so the difference is minimal.

**Maxamuslead** · 21st July 2017, 11:33

Originally Posted by Giles

@Maxamus, Mantis 2 will be somewhere between 13.2 and 13.6 I imagine, CAD is saying just below 13kg right now, with small wiring bits missing. 2024 is 2.78g/cm3 and 6082 is 2.71g/cm3, so the difference is minimal.

hmm ok as the info i got from here says other wise. meh it is the internet it's fully of lies

http://www.makeitfrom.com/compare/20...96082-Aluminum

**Giles** · 21st July 2017, 11:47

I've always gone by the ASM database. I've not encountered that makeitfrom website before, although I like the comparison thing.
http://asm.matweb.com/search/Specifi...ssnum=ma2024t4

**Maxamuslead** · 21st July 2017, 12:06

yeah it useful. might be worth using the higher estimation as it is easier to add weight then remove it

**daveimi** · 22nd July 2017, 21:13

Sorry to sound dim witted (i manufacture robots on the coffee table), but is it a case of you drawing it all out in cad and then sending the files to a company who then mill it / cnc it etc? So in effect if I learnt cad I could stand half a hope in hell at producing something like that?

**Giles** · 23rd July 2017, 08:48

Most probably yea. I still have to make all the standoffs shafts and gears etc on my lathe and do lots of other parts, but the main frames can be easily cnc'd or water jet cut and assembled. My first robot (spinner wedge) was all just water jet profiles bolted together with m6 threaded bars, definitely coffee table levels of assembly.