If I have learned this stuff right from reading here and other robot boards for the past two months, with full load of 14AMP, you are going to need something a lot heftier than the EZ-B motor controller. A Sabertooth 2x25 or a pair of RC-ESC's of higher than 14A (you always want some overhead above the max rating of the motor) would be what I would be looking at.

Alan

So if I use the sabertooth x 2,, with the correct amps nerd, I am still able to use the ez-robot controller to control forward an,backward and full rotation motions?

Ok thanks

Hi GotRobbed,

That is right. Alan is correct. You need an H Bridge or Electronic Speed Controller rated for at least 14A. The 2X25 Sabertooth provides forward and reverse for two motors. Don't forget you will want an independent power supply for those puppys to drive them (not the EZ-Bs power).

v/r

Kevin

How about using a power supply like this to run both or do I still need the to be independent? Werker 12V 12AH AGM Battery .250 Terminal WKA12-12F2.

Hi GotRobbed,

You will want to run the motor power from this battery directly to the Sabertooth motor supply pins as this power source can handle the current demands of your motors.

Looking at the Docs, the Sabertooth circuit board requires a 5V regulated power source for the circuit driver (logic) power. Your EZ-B can deliver this. (correction....the port is for powering external circuits..it is an output to drive servos, receiver, and possibly even the EZB....as TJ points out further down this post)

As for powering your EZ-B off this battery, you want to consider how many other things your EZ-B is going to be driving. As DJ has said in a few of the forums the higher the higher voltage you provide the EZ-B and the more things you run (higher current) the hotter the regulators are going to get. Stepping down the voltage may be something you want to look at but the EZ-B can handle up to 14V as per the documentation.

I am running my EZ-B at 7.2 volts right (manual says that is ideal) now with no issues but I am watching those regulators on the EZ-B.

The Sabertooth looks to be a very robust H bridge with alot of settings. You will want to check docs and the forums on how to set it up with the EZ-B. I don't have one (yet) so I don't know how well they are working.

Good luck!

v/r

Kevin

I usually run my ez- b controller off of a 7.2v 3 amp rc battery with about 6 Servos running along with it, with no problems. But I figured using the werker 12v 12ah agm battery from the ez- b controller to run the sabertooth 2x15 which run 2 12v dc reversible gearhead motors 160rpms( is powered by 2 12v batterys), a 12v lighting system, a mp3 trigger and also probably another servo controller which runs another gearhead motor, which would be controler by a joystick controller probably the ps3. Do you the this set up would be ok? Without burnning out anything? Or should add some sort of power converters 12v to 6vand 10 amp and 5amp fuse blocks?

Thanks for helping out

I am very interested in this thread and will be following it closely. I am going to be trying to hook up the EZ-B and Sabertooth 25x2 motor controller with a wheelchair based robot in the near future. Hopefully I can get good info on the setup. Have any of you that are working with a wheelchair encountered a problem with auto brakes on the wheelchair motors? If so did you have to remove the motor mounted brakes? A tutorial would be greatly appreciated. Lloyd v

http://youtu.be/xT2WtVC9wjo is the link if you dont see the video

there are 2 threads dedicated to this, possibly 3 because i asked the same question. i got my sabertooth and airplane tx and rx to work, but not working with the ez-b yet.

email me so we can post in 1 place and not repeat ourselves. plus i can give u some advice from already using the sabertooth. TJ http://www.TheGoodRobot.com