Torque required for hammer to self right?

[PJ-27]

Re: Torque required for hammer to self right?

Certainly looks the business! Here's hoping it has the goods.

[shakesc]

Re: Torque required for hammer to self right?

Here's a quick video of it self righting
The battery is 4s with low charge but will be changing this up to a 5s
It also self rights with the axe extended



Stripped the bot down to do some welding and tidying

[daveimi]

Re: Torque required for hammer to self right?

That's really cool!

[PJ-27]

Re: Torque required for hammer to self right?

Very tidy looking machine.

[mattsdragons]

Re: Torque required for hammer to self right?

Very nice machine, what motor are you using behind the axe?

[maddox10]

Re: Torque required for hammer to self right?

2 Gimson GR01's

[Ellis]

Re: Torque required for hammer to self right?

Very nice machine, what motor are you using behind the axe?

Previous page, man.



Edit: Mario beat me to it!

[mattsdragons]

Re: Torque required for hammer to self right?

That's nice, didnt look at the other page, just the video

[ady]

Re: Torque required for hammer to self right?

Very nice, have u any plans to stop it getting stuck on its side?

[shakesc]

Re: Torque required for hammer to self right?

Havent tested yet as I did a complete strip down to do some welding
Its not too obvious but the side panels are not vertical
I'm banking on that plus the axe changing the centre of gravity will force the bot upside which I can self right from.
If that doesnt work then some spikes on the side (I liked the look of the kebab skewers that someone else posted) look fun and would make it more unsteady

[shakesc]

Re: Torque required for hammer to self right?

Still pondering a scooter motor. Those buggers are heavy though (MY1016 are 2Kg) - I know the Aussies use them

MY6812 are quoted as 0.42 Nm @ 24V
MY1016 are quoted as 0.61 Nm @ 24V / 2932 rpm [max efficiency]
These would really need a 2 stage reduction

Gimson's are 1.41Nm at peak

My main problem is packaging. The battery is higher up than I want it to be. [it fits but feels too vulnerable]
Might move the motors up to allow the battery to be packaged in the guts of the machine and moving the electronics (TZ85A's) to one side.
I can save weight by moving from pillow bearings (convenient but heavy) to simple bushing. For now its a runner (well, once its all bolted back together )

[ewan]

Re: Torque required for hammer to self right?

Much more than 1.41Nm 'at peak', I think you're quoting the maximum efficiency torque.

[PJ-27]

Re: Torque required for hammer to self right?

Don't forget you need to get the li-po out for charging and in the stress of the pit having it buried deep in the robot is the last thing you want.

[Daniel]

Re: Torque required for hammer to self right?

A couple of videos just to prove to can get a scooter motor powered axe into a 5mm steel chassis and get it under 13.6kg

Not the best camera angle and you should ignore the fact that the drill gearboxes fell out of the robot
http://www.youtube.com/watch?v=VIOxQtQbXqQ

[shakesc]

Re: Torque required for hammer to self right?

nice find on the videos, I like Avenger and Huntmans axe bots
Good write up at http://robowars.org/forum/viewtopic.php?t=734

I will be sticking with the current design and making the battery well package and accessible (something to ponder over Christmas)