Metalskullrobotics build thread

[stef]

We are Metalskullrobotics, We build robots now for about 11 years. We mostly build raptor weights because it is a nice size to build and still are very power full. The latest robot we build is Otis it is a 6kg robot with a nice drum on the front, same way build as 720 with the t slots. It spins about at 10k rpm witch makes a very nice sound. It as a shock mounted 3,5 mm grade 5 titanium Armour ring around. Drum made of 7075 and is 64 mm in diameter. With two tool steel teeths.

https://www.youtube.com/watch?v=HoGqHE_bVuU



last year we were visiting the gatget show to view the fw champs. This year we like to participate we are building a pusher robot right now. Next featherweight will probably a up scaled version of otis.
This is what we made so far. We have try'd to make everything our self from wheels to gears.



















Team metalskullrobotics

[stef]

some more pictures there was a max of 10 in one post.

[Andy]

Wow, that drum looks very cool indeed, and the feather looks really nice so far too! Nicely done

[adz600]

very nice build great machining skills on a hobby machine

[PJ-27]

Engineering porn

[daveimi]

That's fit...

[stef]

thank you for the compliments! I have a question about fusing the lipo battery.
I have a 4000mah 45-90c lipo. There for i need a fuse of max 360Amp.

Is it also allowed to use two fuses one for each esc? I use tz85's with simonk firmware.
If i fuse them each with say a 120Amp fuse then the total is still way under the 360amp.

team metalskullrobotics

[maddox10]

Anything below the set rule max is allowed.

[PJ-27]

Most people have a master fuse, and then some have a master and then smaller ones for the ESCs.

The only issue with not having a master fuse, is that the tech checker will have to ensure the fuses will kill all draw on the battery if they both blow.
This is likely not going to be the case as your power light will probably be split off before the ESCs.

In short, if you can find one big enough, make sure you have a master fuse. 180-360a

[stef]

My idea was to protect each esc separate. Had a few burned tz85's before, I will go for one big fuse from about 250amp.
This is where i am now on the building progress:
The hardox shell have also been cutted this week.




And it size compared to the raptor

stef

[Rapidrory]

You should try a pair of VESCs instead of the TZs, then you could limit the current and avoid anything blowing up! (plus you also get proper low end control) http://www.enertionboards.com/electr...or-controller/

[stef]

I never used the tz85 with simonk, the times it burned was with the botbitz firmware due a faulty motor.
Today started welding the frame, it is made out of 3,2mm hardox and it's nose is made out of 6mm hardox.



http://gallery.svitterzon.nl/cache/a...2011.26.20.jpg

[Andy]

Great shape, really cool stuff

[Pinski1]

That's gorgeous!

[adz600]

Nice build