General questions for first robot

Please post all questions and answers in here. This way people can easily see if someone else has the same problem.

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joey_picus
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Re: General questions for first robot

Post by joey_picus »

I used to run 75.7:1 motors on Jigsaw with 32mm wheels and found it was too slow to keep up - it runs 50:1 HP motors now (which are fast becoming the standard: http://www.robotbits.co.uk/motors-gearb ... od_10.html ) with the same wheels and has more speed and power than it'll ever need!

As much torque as 298:1 motors would give you, you'll move far, far, far too slow to ever be able to make use of it.

The other components look mostly fine, the spinner motor seems a bit on the small side though - go for an outrunner weighing about 25-30g for a decent spinner.
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
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BeligerAnt
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Re: General questions for first robot

Post by BeligerAnt »

The brushless spinner and controller look OK, I think they're the same ones that Antipathy uses. An 18mm brushless is plenty for an antweight spinner.
You will never be able to use all the torque that typical antweight motors can produce. I've never known anyone stall a drive motor yet - there simply isn't enough mass involved... :wink:
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Shrike
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Re: General questions for first robot

Post by Shrike »

The reason I am worried about the drive motors is that most spinners I have seen loose battles because they go flying when they make contact with another robot. I want to try and make sure that this will not happen to me.
Doing nothing is hard to do, as you never know when you are finished.
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peterwaller
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Re: General questions for first robot

Post by peterwaller »

While that does often happen in many cases the robot is airbourn so the drive and wheels have no effect.
Even if the are still on the surface it is far more about grip than torque so all you can do is get the grippiest tyres and as much weight over the wheels as possible and hope.
razerdave
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Re: General questions for first robot

Post by razerdave »

I've never known anyone stall a drive motor yet - there simply isn't enough mass involved...
I have somehow managed to burn out 2 on Bulletproof in the last 5 months. What cause, I have no idea because I wasn't using it either time :P
Anoptimistprime
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Re: General questions for first robot

Post by Anoptimistprime »

BULLLEEETTTTTPROOOOOOOF
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Remote-Controlled Dave
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Re: General questions for first robot

Post by Remote-Controlled Dave »

That's starting to get irritating
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razerdave
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Re: General questions for first robot

Post by razerdave »

Glad I'm not the only one.
Anoptimistprime
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Re: General questions for first robot

Post by Anoptimistprime »

Well I'm not at the aws so I have to make up for it somehow :)
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Shrike
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Re: General questions for first robot

Post by Shrike »

Moving back to the topic...

I have done some quick maths, and so far the total weight of the robot is 83.08 grams (without chassis, armour, weapon or battery). Is this an ok weight, or should I start bringing it down now?

Also, can anyone recommend some good batteries (either LiPo or NiCad)?
Doing nothing is hard to do, as you never know when you are finished.
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