esc

what esc's are good and cheap? ive heard of electrolize, sabertooth and scorpion. dose anybody have one forsale? or know where to get one cheap from?

i would go for electrolize, really easy to set p and use and are tough little things :)

Electrolize? You wouldn't mean Electronize by any chance? Just trying to prevent confusion. I have two 30a Electronize ESCs, I haven't had any experience with any others but for cheap, solid and functional speed controllers, they certainly do the job. From what I have heard around the forums, they're tough little things. Also heard they aren't as precise as some people like their ESCs but for a cheap bot, they work great.

I've tried the 25A sabertooth, many electronize and the sidewinder (bit over rated for a feather). The one I would recommend would be the electronize. As others have said, solid little controllers (can handle inrush currents into the 100A+ mark) so they are well rated for drill motors. I had issues running the sabertooth to it's limits and the sidewinder was nice but at 400g or so too heavy.

I have never noticed a problem with accuracy of the controllers. I'm always of the opinion that if you can't control your machine with something like an electronize then you have more issues than just the speed controller.

thanks guys but in the robo challenge bots they have marine 25's? anybody herd of these?

I guess they are boat controllers, Eric Jr uses them

Something similar to this:

http://www.ebay.co.uk/itm/2x-Marine-50A ... 3f0cb1be97

Ive got four of them which i dont need if anyone is interested? they've had their on/off switches removed though.

Note those controllers do not have linear control in both forward and reverse directions (rated 50A forward 20A reverse) - pretty hard to run full proportional tank steering on them

Out of the Mtronics range there is only one controller that offers proportional Fwd and Bck and instant reverse and that is the Tio Marine range I believe:

http://www.mtroniks.net/products.asp/Su ... 65/tio.htm

Note though, those ratings appear to be peak and not constant.

I would go with Electronize, I don't know why so few people use them. They are seriously hardy (more so than most other controllers, the 15a model has a 40a peak rating and 270a burst!), apparently can be upgraded easily and come with a cover, so you don't have an exposed PCB in your robot. They're also one of the cheapest.

Would seem the common reason to use controllers other than electronize is their relatively slow forward/backward switching time due to use of relays rather than a full H-bridge (solid state) as in examples like the Scorpion XL/XXL. They're bloody rugged though

Quote:

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Originally Posted by typhoon_driver

I'm always of the opinion that if you can't control your machine with something like an electronize then you have more issues than just the speed controller.

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Thanks for outing me on the forum Gary :(

The reason we don't use the Electronizes is size.
Compared to a Scorpion XXL Ilyama version the Electronizes are Huge.

Quote:

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Originally Posted by cliveb

Thanks for outing me on the forum Gary :(

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Clive, I didn't know you were into guys :lol:

+1 for the ruggedness of the Electronize range.
Like Ewan said, the delayed fwd/rev switching action and lack of braking are a bit sloppy when compared to the precision control capabilities of the solid state controllers, but that's nothing a little bit of driving practice can't compensate for.

@Maddox, yeh they are rather large, plus you need 2.....

But if you have the space they're great.

thanks guys if it had 50a fwd and 20a back would that mean not a perfect turning circle? but i might buy them! :D

I assume that as long as you're drawing less than 20A, which 1 drill motor would do, then it will be fine. They are fine in Eric Jr anyway :)

If you really want to use the Mtronics ESC's then just got for the models that have proportional fwd and rev.

thanks, dose anybody have one for sale?