Starting Point

[zoll]

Re: Starting Point

No idea how finer control I need, have nothing to gauge it by, so kind need a good recommendation.

[muchalucha]

Re: Starting Point

you have 2 options , proptrional and bang bang , bang bang is on / off , its etierh full speed ot nothing , in bth directions. Proportional control gives you an invinitely adjustable speed , so you can go round corners like you would in a car , not turning on the spot.

Prportional gives much finer control so is better for fast robots and robots with big budgets but tends to be a lot lot lot more expemsive than bang bang. Id recomend bang bang.

[zoll]

Re: Starting Point

Bang-bang sound good to me, I assume u still have some steering options by running one side and not the other. What speed controller would i need to do this with the 4 motors?

[typhoon_driver]

Re: Starting Point

Don't bother with bang bang. Proper proportional speed controllers are far superior and will give you a controllable machine. With a bang bang machine, you will be lucky to get it going in a straight line.

And for all those that have used them in the past, yes i know that they CAN work but thats not the point. I CAN open a tin of beans with a hammer and chisel but I'd much rather use a tin opener as it will do the job far better.

Proportional controllers such as the electronize, sabretooth, scorpion, sidewinder (a lot of s's in there) or any one of the marine controllers that are suitable don't necessarily have to cost a huge amount. Generally in the past I've built machines entirely from second hand parts from people on here.

[zoll]

Re: Starting Point

How about two electronize FR30HX Controllers at £45 each or the XXL, it has already been hinted that the sabertooth wont handle it and i am currently looking into the others you suggested

[psycho_fling]

Re: Starting Point

go for an xl then get rick maas to upgrad eit to an xxl with extra cooling and protection - much easier to mount, and look after i can send you his emial if you want to talk to him

alex

[zoll]

Re: Starting Point

Cools sound like a good idea, recon that would be able to handle the require ments? If so any idea where I can buy a XL from in the UK or do i need to order from america, also any idea how much tht upgrade costs? Thanks for the help

[psycho_fling]

Re: Starting Point

yeh 4 drills easy id say the upgrade for me was about £65 and you will need to buy from the us however rick sometimes holds finished models and you can buy one straight from him for the bigger amount

it is worth it though, he lives in the neatherlands so there is a slight postage cost but again worth it

i have pm ed you his email just ask him about it and he will help

alex

[zoll]

Re: Starting Point

Ok think im going to buy my drills today, just before I do though it not worth upgrading to http://www.diy.com/diy/jsp/bq/nav.js...isSearch=false or http://www.argos.co.uk/static/Produc...LESS+DRILL.htm is it?

[psycho_fling]

Re: Starting Point

those 12v argos ones are fine the only difference i guessw ould be the life of the batteries, but 12volt will work fine plus you can over volt these motors by a few volts giving extra speed

plus the money you can save here might mean you can get the xl upgrade version

alex

[muchalucha]

Re: Starting Point

ill second that. YOull have much more headroom for overvolting with the 12 V drills , and there cheaper.

[zoll]

Re: Starting Point

Right well I bought my first two drills today (well when I say bought I had nectar card points saved up so actually free ). Ive emailed rick about the XXL and just waiting for him to message me back. Have also message grant to see if I can get some blue wheels. Just need to sort out a reciever and transmitter now.

[muchalucha]

Re: Starting Point

Planet 5 !!!!!!
http://www.sussex-model-centre.co.uk/sh ... p?id=29064
Did you get the 12 V or 24 V drills in the end ?

[zoll]

Re: Starting Point

Got 2 x 12v to start and im going get two more to go 4wd in the end, just got 2 to start with tho.

[muchalucha]

Re: Starting Point

good good . Have you thought about any weapons or what you want to build the thing out of ?