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The answer is that few of us believe that the method described in the article does not work.
The stepper motors always draw the same current, no matter if they are turning or just holding the load. The current won't go from 1A to 1.1A when the worm starts to "bite" and it will not go even higher when the worm binds. It will just stay 1A.
But if you want to try, do like I described above. You need to measure the current at the power connector which will include both motors. Disconnect, say, +ve wire, pass it through the multimeter (in current measuring mode) and then pass it back to where you disconnected it. You want to close the loop so that the current can flow and power the mount.
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