NST

[Anttazz]

Its gonna be absolutely terrifying with a brushless motor in there :shock: Gonna need something special to keep it in the arena.

[sam_smith]

Just some finishing touches to the ti front piece, rounded edges, hex counterbored to captive nuts under where the bar assy spins and countersunk holes ready for bolting together.

Below is the new Scorpion brushless motor and speed controller. They look very nicely engineered so i'm hoping that with a good quality custom gearing arrangement the new system should improve the power and reliability of the machine.

I'll keep posting as this upgrade develops

[james...venom]

SWEET! that ti piece looks amazing. I think NST with the brushless setup is going to be terrifying in battle. really nice work sam!

[sam_smith]

Thanks James, much apreciated!

Design calcs suggests it'll be noticably more powerful, but the shaft drive design is possibly a bit risky, will hope that stays reliable. Testing will at least tell if there are any balance issues in the drive shaft (which will be spinning up to around 10,000rpm !!

Anttazz, your absolutely right, even more chance of flying out of the arena now. Will have the variable controlled throttle so may have to be patient in comp battles not to push it too much! Theres room for more magnets but i very much doubt i'll have any spare weight for them.

Some more build pics of the progress over the last few days...

brand new top bearing support for the bar assembly now with bevel gear fitted. This probably makes it clearer now what i've been going on about shaft drive transmission from the back of the robot instead of the chain drive previously fitted.

[gizz]

Wow looks very well made!

[PJ-27]

Looks amazing! Is that a big ol' needle roller bearing inside the arm?

[Laser]

That is amazing!

[Max]

Damn!
My new robot looks the same as yours (but much less well engineered!) Sorry I wasn't trying to copy you, I guess great minds do think alike!

[sam_smith]

Thanks guys!

Yes PJ, I was forced to change to a needle roller bearing in this upgrade make space for the hub supporting the bevel gear.

The lower support still has an original single track ball bearing.

Some more progress to NST...

wish I could say this was just the 14 hours spent making it today, but it seems to have taken the best part of a week of spare time to design....

The first piece of the custom scorpion gearbox.

[PJ-27]

What have you got against needle rollers? Not as free spinning? Or are you complaining about the needle thrust bearing? I plan on doing the exact same thing on the arm of spinza. They are the only things thin enough.