I want to use a microstepping driver like Haitronic's HS2215 with a NEMA 17 stepper motor with rated voltage of 4.2V and rated current 1.5A.
The input voltage range of the microstepping driver is 9-40VDC.
From what I understand, I can use the switches to set the maximum current. In this particular case I would use SW4=On, SW5=On, SW6=Off.
TB6600 current settings You can adjust the current that goes to the motor when it is running by setting the dip switches S4, S5, and S6 on or off.
I've found this Maker's Guide which describes the settings for use with an arduino. However, I am not certain what voltage (VCC) should I supply to the mircrostepping driver? Should I provide, the minimum of 9VDC, should I provide less? Is this irrelevant?