7.2 or 14.4 volt?

[motty]

I am looking to build my first bot, can somebody answer the following please.
1) Am I better off going for 500rpm 7.2 drill motors or 14.4.
2) What amp controllers will I need for these.
3) As the drills themselves are 0-500 rpm could I not use the controller thats built into the drill.
4) What size wheels are the best for an invertable bot Thanks

[typhoon_driver]

7.2 or 14.4 volt?

1) 14.4v
2) I would say something around the 20amp plus mark to make sure they dont burn out
3) No as it wont interface with any radio control gear and even if it did it is cheap and nasty.
4) depends on how tall you want your robot to be but if you are bolting the wheels onto the drills then I wouldnt go much larger than 150mm in diameter max.

[ewan]

7.2 or 14.4 volt?

If youre looking for a near-complete starter pack including drills, wheels, controller etc. then look no further than this offering of mine: http://www.gimsonrobotics.com/shop_robot-kits.htmlhttp://www.gimsonrobotics.com/shop_robot-kits.html

All the best, Ewan

[maddox]

7.2 or 14.4 volt?

Over here in Belgium and the Netherlands we have the MSR drivetrains.

very powerfull, compact, easy to use and not that expensive.

(Message edited by maddox on March 02, 2007)

[lex]

7.2 or 14.4 volt?

Have you got a link for that Mario?

[swanaldo]

7.2 or 14.4 volt?

i might be interested too mario

[maddox]

7.2 or 14.4 volt?

It seems the builder has discontinued the MSR drives.
By lack of the cheap, but powerfull motor simular to the 6 times more expensive (but still not too expensive) speed 900 BB Torque motor.

[antrock101]

7.2 or 14.4 volt?

couldnt find a thread so i stuck it here.

does anyone know where i can get 12v batterys ni cads pref for my rc smart if i buy them and drills? most placesa stock 9.6 on ebay cheap but i cant find 12 for under 25 quid

[rob]

7.2 or 14.4 volt?

Check in your local woolworths they might have some of these left: 18v
http://www.woolworths.co.uk/web/jsp/product/index.jsp?pid=50919210http://www.woolworths.co.uk/web/jsp/...p?pid=50919210
and these: 12v
http://www.woolworths.co.uk/web/jsp/product/index.jsp?pid=50559077http://www.woolworths.co.uk/web/jsp/...p?pid=50559077

[antrock101]

7.2 or 14.4 volt?

i don want drill batts there heavy and take forever to charge

[ewan]

7.2 or 14.4 volt?

Why Ni-cads? Ni-Mh are usually better suited for featherweights.

http://cgi.ebay.co.uk/Radio-Control-Battery-Pack-12V-3300mAh-SC-NiMH-5x2_W0QQitemZ300011644361QQihZ020QQcategoryZ34063Q QcmdZViewItemhttp://cgi.ebay.co.uk/Radio-Control-...MH-5x2_W0QQite mZ300011644361QQihZ020QQcategoryZ34063QQcmdZViewIt em

[leorcc]

7.2 or 14.4 volt?

That totally depends on the type of feather. For flippers and axes, NiMh are well suited becaue they keep their voltage up. But for a high powered spinner NiCads are the better option. They can deliver more amps than any NiMh.

NiMh is getting better at delivering amps, but the internal resistance of NiMh is still a lot higher than NiCad.