Its the other way round.
If it is microstepping use Peak.
A full step driver is a square wave so peak is RMS.
Originally Posted by Oldmanandhistoy  Hi John,
Looking at the spec’s of the motor I would run it parallel at around 2.1Amps for highest speed and max torque if micro stepping.
If you are using a micro stepping drive it will be RMS rated not peak. The stepper motor spec sheet will very likely be rated for peak but you would need to check.
3Amps peak = 2.1Amps RMS
If you are using a full step drive then use the peak 3Amps or in your case as near as possible.
I am working form memory so double checking my info would be wise. 
John |