Asked
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going to buy a battery for a sabertooth. im going to get one with a mini Tamiya end and add the male plug to the sabertooth.
what is a good voltage for a sabertooth 2x12 running two 3A motors, each with a peak of 6A's?
if you find a good one please give a link.
Thanks, Techno
I see. Yes bigger is better. You are correct about them not delivering more power than needed. You have to be careful about not applying too much voltage to a motor, but you can supply unlimited amperage. They will only pull what they need. Just a side note; If these are the motors that you posted pictures of in another thread, they look awfuly small to draw that much current. I don't mean to question you, I just wonder if you should double check that.
Here is what I have. These are awesome! Sabertooth 12 x 2
http://www.lynxmotion.com/p-562-sabertooth-2x12-regenerative-dual-channel-motor-controller.aspx79.99 , but if you sweet talk them they might hook you up. When I told them about the Jarvis project they discounted the controller 10 percent off and discount on express shipping too
Always try and sweet talk anyone, chances are they can move a little, more so if you have a big project where you can throw in a subtle advert for their products. I learnt that way back when I was heavy in the car modification scene (I paid no more than 50% for anything on my car, some was even free). If you don't ask you don't get but you have to ask the right way
Back to the topic in hand, I would also recommend the sabertooth 12x2 based on what I've read about it and the load you will require.
ok so a 6V battery?
Sure . or a 7.4v lipo , that's called a 2S lipo when your shopping by the way. A 2200ma is plenty
My only concern on using 6V would be if it drops below 6V when running low, the sabertooth may cut out. I don't know if it would, it's just a question that popped into my mind, someone else may know the answer.
As Josh mentioned, look at 7.4v 2S LiPos, they are cheap, light and hold a lot of power. But then a fully charged 2S LiPo is 8.4V, can the motors handle that? (I'd guess yes but don't take my word for it).
You could regulate the LiPo to 6V but when I was looking for my regulator the ones i found were 5A which is below your peek (and running) current.
You'll be fine with 8 volts especially when it gets dialed back to adjust speed with pwm. I'll do a write up on motors and applied voltage today.
Ok thanks guys.