1st bot

[Guest]

1st bot

so if i wire the batteries in parralell, would i wire the motors in parrallel?

[team_ireland]

1st bot

Mate weight would be a problem with that robot.
Again you gear down a gold and include a wheel I would say 1.5kg would be a fair enough estimate. 3.3amp hour SLA batteries weigh 1.3-1.4kg each. The two electronises weigh 0.5kg total. Add another 0.5kg for receiver, wires, link, rx battery etc.

SO thats:
4x Golds and Gears: 4x 1.5kg= 6kg
4x 3.3amp 12v SLA: 4x 1.3kg= 5.2kg
2x Electronise 30amp: 2x 0.25kg= 0.5kg
1x Receiver wire etc: 1x 0.5kg= 0.5kg
Total: 12.2kg

That does not include any chassis, armour, bolts or anything else. There os absolutely no way those parts in that number could end up underweight.

I would recomend:
2x 24v Gold motors: 2x 1.5kg: 3kg
2x 5amp sla in series: 2x 1.6kg= 3.2kg
2x Electronise 30amp: 2x 0.25kg= 0.5kg
1x Receiver, Wire etc: 1x 0.5kg= 0.5kg
Total: 7.2kg
Remaining weight: 4.8kg

That should be enough for a decent chassis and armour.

Regards
Ian

[storm]

1st bot

Mark, weight is a problem if youre trying to fit 4 Gold motors, wheels, drivetrain and 4 12v 3.3ah SLAs into a 12Kg feather

..... trust me.

Ed
http://www.teamstorm.comhttp://www.teamstorm.com

[psychostorm]

1st bot

If you think you can get all that lot inside 12Kg....

Go ahead try it. Were not gonna stop you.

My main concern is that you have a tradeoff between drive power and armour. Even if you have managed to get this full drive in at 10Kg, are you sure that the remaining 2Kg would be enough to protect these precious parts?
There are quite dangerous spinners around. (Eds Vortex being one of them.) and they could cause a lot of damage to your robot in battle.

Just concerned thats all.

Oh and Im looking forward to fighting more feathers as soon as Ive finished building. I vant to trash them all! *Evil laugh... decends into coughing* Boy, what a nasty cold I have, ahem. Oh and I said the word with because help is still up for debate...

[Guest]

1st bot

well no the weight limit is 70kg but the dimension limits are that of a feather or about so SPACE is the issuse. Yet i understand your concern and i suppose if we wanted to enter normal competitons we should try to comply to a normal limit. Thanks for the help and i know im a noob to this. If I had it my way and went against the advice of the BNFL engineers id have bosch 750w motors in there but i doubt we would have the room, but definetly have enough weight.

Could someone tell me the dimension limits of a featherweight. Hope to see some of you if we get to take our bot beyond the competition were in.

[typhoon_driver]

1st bot

I dont know if i have special electronize or something but mine only weigh 100g a piece

Mark to answer your question, yes you should wire your motors in parallel, this way they both get the same voltage from your batteries.

this does not however mean you have to wire the batteries in parallel, they can be in series

[grant_ploughbot]

1st bot

just a suggestion Mark, if you are wanting to use so many SLA batteries, why nopt just get one large 7Ah or so 12v SLA that alot of heavy weights use? link the speedos directly to that and away you go!! it will last for AGES, no problem with you weight as you say and much simpler to wire everything up??

oh yer, Ians maths is probably a little on the fuzzbuzz side. considering each gold only weighs 800g my gearbox weighs less than 100g leaving alot more weight. I think the limit is 1m cubed isnt it? though. why you building to feather sizes?

[team_ireland]

1st bot

Well i was taking using mod one gears and wheels so might be a bit heavier than your 100g gear box but I was making a point. As for 250g for an electronise well I have the expernal relay modified ones and with relays they weigh in at just short of 250g so left them at 250g for handyness.

[Guest]

1st bot

is it against the rules to power a bot with a hamster in a spinning wheel?

[storm]

1st bot

No, but you would still have to find somewhere to site the removable link.

Ed
http://www.teamstorm.comhttp://www.teamstorm.com

[grant_ploughbot]

1st bot

would be interesting of you could lol. what if the hamster was the link? put it in the wheel and clip a harness round its neck that u plug in as the link! when the links removed, so is the hamster wasnt there a rule at somepoint in RW saying that organic materials cant be used or something?

[stu]

1st bot

Im contacting the RSPCA! LOL.

Mr Stu

[grant_ploughbot]

1st bot

we havnt done it yet stu, so i wouldnt bother phoning them Its taking me too long to draw the hamster on CAD! means i cant do anything until its done. By the time i finished the first drawing of it, it grew :sad:

[stu]

1st bot

LOL!
Well then you should measure its speed of growth and then componsate. LOL!!

Mr Stu

[Kenny]

1st bot

so what weapon are we going to put on it