I'm trying to drive two linear actuators with an Arduino motorshieldR3 connected to the Mega 2560. I'd assumed I wouldn't need more than 2A per actuator which I know the motorshield is capable of per channel. However, when I hooked everything up it requires just about 2A to get one actuator moving and that's not taking into account any startup transients that might occur. It was recommended to me that I try to use the full current capability of both channels (4A) per motor, thus requiring two motorshields.
Could anyone advise me as to whether the motorshield's channels could be combined into one 4A driver/channel, and whether two motorshields with their outputs paralleled in this way could be stacked?
Any ideas at all are greatly appreciated! Tony