Melty Brain

[adamclark]

Has anyone built a HW melty brain or in fact anyone with a FW in the U.K. that works? I'm going to buy the kit to have a play around and see what RPM it can function at, I think some of the IMU mem devices are even better now. Also the brushless rotax 50cc and bog standard controllers suit the uni-directional constraints

[Shooty]

I believe Team Nuts use melty brain tech in Nuts 2, so you might want to ask them.

[typhoon_driver]

I experimented using the open source melty brain website to make a featherweight a while back. I got it to the stage of being able to move around but university exams took over and I didn't have time to fine tune the logic on the test platform before installing it in a chassis.

[shakesc]

Yep - we have used Melty brain in Nuts 2

Its not straightforward. We have a custom speed controller board from Rory with a Melty brain logic board and software from Gareth

This is the test rig
https://www.youtube.com/watch?v=SNzyC5xqznY

and nuts itself
https://www.youtube.com/watch?v=rGcqr42889g

[adamclark]

That looks good, like the transition from 2wd to melty as well.

[adamclark]

Are you also running the Orangutan B-328 and ADXL193?

[shakesc]

Nope

From memory its a PIC on the ESC and an Arm on the Melty brain. I dont know what accelerometer Gareth finally decided on

[Rapidrory]

We looked at open melt but decided it wasn't really suitable for what we needed, so we made a custom PCB with all the required parts on one board, and Gareth wrote all the code from scratch.

[Prophet Of Doom]

Is there a minimum rotation speed for a Melty brain?

[Retroman]

Is there a minimum rotation speed for a Melty brain?

I'm not sure if it counts but http://www.fightingrobots.co.uk/thre...brain-spinners knightrous mentions a 2 wheel melty being capable of 100rpm translation, a single wheel however appears to need to spin faster

[Pinski1]

Not a minimum speed but there is a trade off. The faster you spin the more energy you store and can then deal out. However the faster you spin the less time you have to try and speed up and slow down the motors in order to translate. So the faster you spin, the slower you translate/move around the arena.

As far as I can tell you're just trying to avoid getting counted out as a melty, any damage dealt is a bonus.