First Time Bot Builder/Buyer

[typhoon_driver]

First Time Bot Builder/Buyer

I have yet to have a problem with my 15A electronize. Even stalled two gold motors on 24v with them and they got a bit warm but didnt blow

[ewan]

First Time Bot Builder/Buyer

James the base piece is aluminium and can be mounted to for additional heat sinking, not plastic.

Although the unit is small it all depends how you set this controller up in your machine. I have full faith that without mechanical problems arising etc. One cooled and heat sunk unit could handle for drills (pairs in parallel). Shame I cant test this myself practically at the moment.

The effect that 4wd has in this case not been looked at carefully here: when you run four drills with four powered wheels, each wheel will typically have less traction and be easier spun, and though the skid steer pattern can produce brief current surges, the overall train wont consume all that more current than two drills taking the majority of the drive load.

At the end of the day its all up to Tom as to what he thinks best

[geeza]

First Time Bot Builder/Buyer

Gary, electronize are great (especially 15A CPU ones) but once youve uses complete solid state speedos the relay delay is impossible. Ive never blown up an electronize from giving it too much current, so you cant go wrong with them for a starter.

[typhoon_driver]

First Time Bot Builder/Buyer

I never notice the delay, wonder if thats just my bad driving

I would like to upgrade one day but if it aint broke then dont fix it!

[xtreme]

First Time Bot Builder/Buyer

ehhh so i dont know whats my best option now. what if i mounted a fan over the speed controller and 2 in the body armor i dont wanna waste a speed controller. but i dont wanna spend alot more cash if it will be ok.

[xtreme]

First Time Bot Builder/Buyer

if i had to go with 2 speed controllers which ones would i use for the 9.6v Drill Motors?

[xtreme]

First Time Bot Builder/Buyer

could somthing like this work? http://cgi.ebay.co.uk/Mtroniks-VIPER-Marine-15-15A-speed-controller-ESC_W0QQitemZ290106340077QQihZ019QQcategoryZ2564QQ ssPageNameZWDVWQQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/Mtroniks-VIPER...r-ESC_W0QQitem Z290106340077QQihZ019QQcategoryZ2564QQssPageNameZW DVWQQrdZ1QQcmdZViewItem

[typhoon_driver]

First Time Bot Builder/Buyer

Tom, sorry to complicate your decision.

If I were you I would go with a solution that has been used a huge number of times with no problems.

Go technobots and look at getting 2 RC speed control 30A with External Relays (part number 1500-022).

Yes it will cost you more initially but its usually better to spend the cash now and not spend twice as much later with blown speedos. Or you could see if anyone has any for sale second hand.

These should be able to happily control your motors without bother. I am always wary of extreme cooling methods ie lots of fans etc as your robot is relying on a small piece of spinning plastic.

Just my 2 cents.

[xtreme]

First Time Bot Builder/Buyer

ok cheers ill see what james baker has for sale. any more ideas for speed controllers anyone?

(Message edited by xtreme on April 26, 2007)

[xtreme]

First Time Bot Builder/Buyer

would 2 of those those mtroniks viper 15s do the job? or the viper 20s?

[jamesb]

First Time Bot Builder/Buyer

ill return your email monday or tuesday tom, in the mean time, dont buy anything, you will waste your money on things weve already blown up.

btw Ewan, I know how the sabretooth works, Ive had one in bits already for extensive testing, and in 3 different robots, but thanks for the info. I stand by my earlier info.

[ewan]

First Time Bot Builder/Buyer

Keep youre hat on James. If its the transfer material youre referring to you mightve underestimated it. ...

(Message edited by ewan on April 26, 2007)

[jamesb]

First Time Bot Builder/Buyer

?
sigh

[xtreme]

First Time Bot Builder/Buyer

ok? i just want a cheap and cheerful rambot that i can kill my friends rc cars with till i can get to an event

[RogueTwoRobots]

First Time Bot Builder/Buyer

Tom, the Viper 15s or 20s would probably work (if youre going 4WD then lean towards the 20s) but from having a quick look through the specs, the highest input voltage you can use is 12V, which means if you ever want to upgrade to, say, 18V or 24V, youd have to get new speedos. (Just as a comparison, the Electronize take up to 24V input)