Calculating stepper driver settings

I'm curious about the max amperage we should use when setting stepper voltages. If I have a stepper motor that according to the specs is rated at 1.2A, at a rated 2V. Do we have to do any conversion on those values? I'm thinking that we run our stepper motors at 5V, or am I incorrect? If we calculate based on 5V, then that seems like the max amperage becomes .48A (using P = I * E). That doesn't seem right and of course, I'm no electronics engineer.

So can someone clarify how we should interpret these numbers that we get in the specs for stepper motors as it relates to setting our stepper driver voltages?

I understand how to set the voltages just fine, I just need to know how we come up with the target amperage.

Don't worry about the coil voltage. Most people use 80% of max. current and calculate Vref accordingly.
You've registered 4 years ago, so I won't bother you with links to our Wiki or suggest 'searching' the forum

Quote
o_lampe
Don't worry about the coil voltage. Most people use 80% of max. current and calculate Vref accordingly.
You've registered 4 years ago, so I won't bother you with links to our Wiki or suggest 'searching' the forum

Thanks o_lampe. That answers my question just fine.