MicroSumo

Discussions around autonomous, semi-automatic and intelligent robots and systems.

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peterwaller
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MicroSumo

Postby peterwaller » Tue Apr 18, 2017 11:21 am

I am starting to rekindle my interest in autonomous robots and have decided to try my hand at a microsumo.
These are 50 mm cube but it has to fit in the position it starts in and 100 gms total weight.
Here are a couple of shots of the cad.
Side view:
Image
From above:
Image
The vertical PCB means the opponent detection sensors and the edge detection sensors can all fit on the same board.
Here is the basic chassis and wheels with a mock up piece of PCB.
Image
I have just finished the PCB layout and sent it to Ragworm for manufacture today.

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peterwaller
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Re: MicroSumo

Postby peterwaller » Fri May 05, 2017 10:22 am

Board arrived Saturday morning and is now built up and working.
A couple of errors crept in I put the second motor on Timer 1 which turned out to be the 16 bit timer so I had to fit a couple of links to get it on Timer 2.
Image
Also on the new pad layout I created to enable the edge detectors to be mounted at right angles I got a couple of pads swapped so I printed some small holders that enabled a little leeway in how it was connected.
Image

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peterwaller
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Re: MicroSumo

Postby peterwaller » Sat May 13, 2017 4:07 pm

The small 6 mm motor gearboxes didn't seem to have enough power so I have reverted to the standard antweight units.
To get them in the 50 mm cube I had to mount them vertically which does make it a little top heavy.
Here is the hardware still 30 gms under weight even when carrying 20 gms of brass plates.
Image
Image
Image

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peterwaller
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Re: MicroSumo

Postby peterwaller » Mon May 15, 2017 2:59 pm

I managed to hack the software from one of my mini sumo's to get it moving with the edge detectors working but I haven't looked at the opponent detectors yet.
https://youtu.be/zmCEVsl6dkk
Normally these will fight in a much smaller arena.

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Shakey
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Re: MicroSumo

Postby Shakey » Wed May 17, 2017 7:17 am

It looks like you're getting pretty creative with your mini sumo! I hope you do well if you get a chance to compete again.
Alex Shakespeare - Team Shakey:
AWS 44, 45, 49 & 51 Winner - Far too many robots to list!
I sell Antweight Parts, 3d Printing and Custom Designs!

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peterwaller
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Re: MicroSumo

Postby peterwaller » Fri May 19, 2017 7:16 pm

I have done alright in the past as they don't rely on me to drive them but I will be competing at the Birmingham City Uni on the 24th June with the mini sumo for the first time in 6 years. My 3 mini's are more or less the same as before except for better tyres and a new chassis for Insumountable so they may well be outstripped by newer designs. The Micro will if there are any others there take part but I just don't know if there are any about.
Here is the finished micro in a micro sizes arena it seems to work OK but does suffer from tunnel vision.
https://youtu.be/B82rcX7LU3s

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Shakey
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Re: MicroSumo

Postby Shakey » Fri May 19, 2017 9:04 pm

The microsumo bot seems like it could do with a sensor on each side or pointing diagonally out of the front so it doesn't pass by the other bot.
Alex Shakespeare - Team Shakey:
AWS 44, 45, 49 & 51 Winner - Far too many robots to list!
I sell Antweight Parts, 3d Printing and Custom Designs!

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peterwaller
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Re: MicroSumo

Postby peterwaller » Sat May 20, 2017 10:07 am

Yes I think you are right I chose the LED's and sensors to be narrow beam (30 degrees) to try and get more range but with the smaller arena that may not be as important.


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