need a speed controller

Hi I'm new to the forum :D and I want to know which speed controller to get. My budget is low:( but how high my budget can go is down to quality. I decided on the other parts from other posts on the forum.

hey

what motors are you using, what voltage and heavy weight, feather weight or an ant or something?

I'm using 2 18v drill motors and I'm building a feather weight

The sabertooth 2x25 would probably suit your needs. Or double electronize ones which is even cheaper i think.

i'd recommend either:
2x 30 amp electronizes (£86)
sabertooth 2x25 (£96)
scorpion xxl 2x20 (£100) excluding shipping and tax etc

as your using 18v drill motors instead of 12v i think they'll draw more than 15amps. besides it's only £20 extra for 30amp electronizes than it is for 15amp. better to be sae than sorry :)

That is true, and the electronize price is including post, packing and V.A.T according to their site.

Thanks for the advise guys I'm hopefully going to start on my robot this week :D

which website can I get the 30 amp electronize speed controllers from :?

http://www.electronize.co.uk/model_elec ... frames.htm

A slight bump I know, but I thought it was better than making a new thread.
To run 2 18v drill motors, would a sabertooth suffice? Or would it be pushing it?

running 18v would probably be ok but i'd never be happy about pushing a couple of robots around with it ie stressing it

Would a scorpion xl/xxl be good? Or is the Electronize the only one which would cope?

never used them but many people have very successfully used the scorpion controllers in relatively big current draw applications.

I used a scorpion XL on a pair of 18v drill motors run on the same voltage, didn't have any problems after numerous fights (including a butt-kicking from Little Hitter) until I moved to spektrum, because the battery eliminator circuit (BEC) was not powerful enough to supply the receiver, so I had to buy a seperate voltage regulator/BEC to supply 1.5A to power my RX, Gyro and switcher

Why do people use the scorpion over the sabertooth? According to the website the scorpion can only take 12.5a continuous current on each motor while the sabertooth can take 25a on each with a higher peak.

Me personally, I've seen too many broken sabretooths in the FW's, especially them coming off the heatsink (like calums and Ceri's as I recall), no such issues with the scorpion. There quite a few good machines to use the scorpion, the 3 Big Nipper FW's all use one, 360 uses one, and I believe the Shock team use them.

they're also alot smaller than the sabretooth

sorry for bring my first post back but it did't seem necessary to start a new topic but what would the best speed controller be for a 4WD bot runing at 12v for a small budjet

electronize 30a, £45 ea

ok, didn't know if they would be suitable for a 4WD bot thanks

scorpion xxl, a bit more at £120

A 4WD drive machine draws more amps than a 2WD.

It all depends if you use a motor per wheel or just 1 motor a side.

Option 1. Each motor a speedo. Electronise or heavy duty RC speedo.
Option 2. Hefty dual channel speed like the Scorpion XXL or the rare expensive Sidewinder can be used for 2 motors per channel (side) Other option is a Victor per side.

wher would be the best place to buy a scorpion xxl?

Robotpower is cheapest I think:

http://www.robotpower.com/catalog/

thank you for the quick responce

you can get them from robot shop
http://www.robotshop.com/eu/productinfo ... lang=en-US

what modes do people find work best with the scorpion XXL?

Sorry to re open the thread, but has any one used these speed controlers before? I thought I heard someone did (or something similar) but does the low amp reverse afect the driving hugely? And do u think it could cope with two drill motor per ESC? I think forward would, but would reverse? http://www.ebay.co.uk/itm/270826285477?redirect=mobile (sorry if it's the mobile site, I've tryed to chnge it)

Yup I use them in Eric Jr, well, I did up until today when I replaced them with an XL.

Didn't have any issues with different speeds reversing and in forward drive, didn't notice anything at all. I just swapped them out as they're only rated to 12v (although I used them on 14.4 with no issue) and wanted to be able to run something at 19.2v and keep both my feathers using the same battery sets.

Oh ok thanks, I just thought they would be better than the servo, micro switch method, for the old bruiser, it doesn't have to be anything spectacular, and I have a similar one, which I could take to the champs, incase one desides to blow...

Read your first post again there, forgot to mention that on Eric Jr it was only controlling one motor per controller, so not sure how two would fair but I suppose you could always try it.

Hi,
please excuse my simple english.

In Germany, some Roboteers (me too) use these speedos:
http://www.ib-fink.de/downloads_roboteers/index.htm
Dual-speedos with built in mixer. The speedos work fine.

for more information you can send him an email in english.

Regards

Dirk K

Cheers Dirk!

Here's the translated page:

http://translate.google.com/translate?s ... tm&act=url

does that page have prices?

these controllers look very interesting, what current, or amps, can they take? They look good, and some appeared to be programable? Which may be useful (with the exception that the software may be in German) but still interesting. And What sort of prices are these? Thanks