My Nomad has the motors set to:
$100=200.000 (x, step/mm)
$101=200.000 (y, step/mm)
$102=200.000 (z, step/mm)
Lead screw pitch (for Pro variant): 8mm per Mach3 for Namad 883 - #2 by robgrz]
Motors are NEMA 17, 2A per Mach3 for Namad 883 - #2 by robgrz — you should be able to use the above numbers to derive the micro-stepping being used per Shapeoko CNC Router, Rigid, Accurate, Reliable, and Affordable
Max. speed is listed at: http://carbide3d.com/nomad/specs/
Max Speed (X, Y): 100in/min
Max Speed (Z): 50in/min
(and in Grbl set to 2600mm and 1270mm respectively)