Speed controller question - Ampage capacity

[lowndsy]

Afternoon folks. I have a speed controller question for Flat Damon.

I am looking at 12V drill motors which draw ~5.3A and I have a choice of dual motor controllers with 10A, 15A or 30A continuous capacity.

I found this guide and it says the motor will only draw what it needs so if more is available then it won't matter (burst Ampage is within limits on them all too). http://www.robotshop.com/blog/en/how...ontroller-3695 .

I'd rather get the most powerful for future proofing (and better heatsinking), but no point if it blows up motors more often.

Is there a working range to this principle? The example in that articles suggests a 5amp board for a 350 mA motor so it seems like 5.3A on a 15 or 30 would be ok?

Thanks,
Steve