Upgrades

the new watty speedo has arrived, what can i say very nice. looking to change the batteries in the robot as they are big,heavy and old. it runs on 24v (used to run on 2 4qds) and has 4x Gastron 12v 18ah?, i think their from a golfbuggy or something. all im running are 2 bosch 750w motors and the hydralic weapon, can anyone recommend something that will give me as good performance, save some weight, (on a budget with this), and need a affordable charger to suit also.

(Message edited by ady on August 27, 2007)

either NiCads (will prob cost abot £500 for a setup with chargers), or look at the 13Ah Hawkers, slightly smaller/lighter than the normal 16Ahs and can supply loads of current and will be much better than waht you currently have.

nicads? could i use my pro peak constellation chargers with them? as i have 2 of these for the featherweights.

nicads? could i use my pro peak constellation chargers with them? as i have 2 of these for the featherweights.

theres an echo

Yes Ady Yes Ady

:lame:, ok sounds like nicads are the way to go, do i need to have these packs custom made up? or are they something i can get off the shelf?

technobots do them

http://www.technobots.co.uk/acatalog/Online_Catalogue_Bot_Pack__High_Performance_19.htm lhttp://www.technobots.co.uk/acatalog...ormance_19.htm l

Its 3 packs of ni-cads youll want Ady.
Nearly £400 .....

cheers woody

BTW ...Ady,
You could consider increasing your Pack voltage to 30v ... your Chargers ...as I recall will do 30v packs... that is assuming the Wooty will also handle the voltage.

Just a thought :)

absolute max on a watty is 32volts, so should be ok.

i dont know bout that, i have 12ah of 28.8v packs and when fully charged are putting out over 37v for 5mins

kenny, im just going on instructions i recieved with mine last week from ian watts and to quote absolute maximum voltage 32 volts, you will damage your wotty above this voltage and it also says under how to kill your wotty, number 2 (connect more than 32 volts to it),

(Message edited by ady on August 29, 2007)

Kenny is pointing out that the 30v Nicad packs .....when freshly charged .... will have MORE than 30v in them.
Therefore your Wotty may go POP!

Check with Ian to be safe.

I couldnt remember the terminal voltage of a freshly charged Ni-Cad cell ( nominal voltage 1.2v ) ....Google suggest around 1.4v per cell... this would initially give you 35v on a 25 cell 30v pack.

1.6v...

Well ...That seems to suggest that the Wotty is only going to be OK for a fully charged 24v Nicad pack.

Re configure the packs to give a max voltage of 30 ? (take a cell or so out ?). Im sure this would still make a resonable increase on 24 v whilst still makeing the most of a Wooty.
(PS Whats a Wooty speed controller of some sort :crazy:)

24v pack is 20 cells.

20 x 1.6 = 32v.

So no more than 20 cells (24v nominal)

A Wooty is a controller made by Ian Watts ( Bigger Bro ).

Arr well, Ill shut up now :uhoh:

Thzs wotty is running at more than 30V with the A123 cells, but his controller has been upgraded to handle the higher voltage. Ian initially said to me not to go above 30V.

Yes, Ian built me a special version that can handle up 48V, so I can use it in beta.

oh, and its a WATTY of course, not a wotty, or a wooty.

nobody get a metal floor in the arena! :)

yes i have but its 3ft by 6ft

weight issue i think

There seems to be some confusion about Ian Watts motor controller, it IS spelt Wotty!, his idea, not wooty! or watty!
I did the logo artwork for him (as well as all the first trials of the mk1 and mk3 controllers in Centio(refbot) and Pressure mk3)