Hi,
I am building a biped which at times draws more than 10 amps continuous. The 6V voltage regulator is only rated at 10 amps continuous. Will it be possible to connect two regulators in series to get 20 amps continuous.
Cheers,
Nikolaj
Connecting regulators in parallel can be troublesome due to tolerance issues and the tendancy for one to carry more of the load than the other. You can use a shottkey diode (example MBR1035) in series with the output of each regulator and then tie the cathodes together as your “output” but this will give marginal performance at best and does not guarantee the regulators will evenly share the load. You also need to consider (deal with) the power dissipated across and voltage drop introduced by the diodes.
If you are using the SSC-32 to control the servos on your robot then you can use two regulators and connect one to the VS1 input, the second to the VS2 input, and remove the VS1=VS2 jumper. In this way the 0-15 side will be powered by one regulator and the 16-32 side by the second.
This was exactly my thought when I read the original post. Split the servos into two power bus lines, and power each one independently. Even if you aren’t using an SSC-32 (…and why wouldn’t you?), you can do this by making your own power bus breakout. As long as the grounds are common, the servos can receive their power feeds in groups, or even individually. I do this on my Lynx-6 arm, feeding the wrist rotate and gripper micro servos through a 5-volt regulator so as to avoid over-volting them and/or stripping out the gears.
Its a possibility to split up the rails, but it will introduce some major changes on my biped. If it is possible, it would be nicer to have one regulator yielding 20 A. Well, Maybe 10A will suffice 
If it is a switching regulator than they can be connected in parallel. A linear regulator will over heat because the internal resistance will not be the same so one will take more current heating up, thus the internal resistance increses and the other regulator starts to take the load and it’s internal resistance increses untill you burn out them.
Not really… Analog and switching power supplies can share a load, but they must have the ability to be current limmited, and they require additional circuitry to monitor each supply to make sure one is not doing all the work.