I have an aerolatte milk frother that is just about OK to make cappuccino style foam when the batteries are new. So having returned an espresso maker due to the feebleness of the steam outlet, I went back to the aerolatte frother, and tried it on 4.5v and 6v in place of the usual 3volts.
This improved it dramatically, but how do I know what is too much stress on the motor ?
I suppose it is related to how much the motor is slowed down in the milk, in which case what is the best way to measure the rotation speed ?
Simon.