I am at the stage of building 3 axis cnc machine and such a question. I have for this project nema 17 engine specification Step Angle: 1.8 deg, Number of Leads: 4, Body Length: 48mm, Shaft Length: 24mm, D-cut Length: 15mm, Shaft Diameter: 5mm, Rated Current / phase: 2.0A
Phase Resistance: 1.4ohms, inductance: 3.0mH +/- 20% (1KHz). For this, the SODIAL (R) TB6560 3A Single-Axis Controller Stepper Motor Driver Board, Model No. TB6560
Supply Voltage: DC 24V, Working Voltage: 10V-35V, Rating Output Current (Max): 3A, Peak Current: 3.5A.And here is the question what will be the appropriate 12v or 24v power supply, and how much should it have?