I'm working on a project involving:
- Three NEMA 17 stepper motors with 4.2 kg-cm torque
- Three A4988 drivers
The motors are rated at 3.2 V, 1.2 A/phase, so at 3.2 V the motors require 3.6 A of current in total which means a wattage of about 11.5 W.
Can I use any power supply which can deliver sufficient wattage or should the power supply be capable of delivering 3 A regardless of its voltage?
Is an 18 V, 2 A supply sufficient or do I require a 12 V, 4 A power supply?
Best Answer
Question
Which PSU to use for microstepping NEMA17 steppers at 3.2V, 1.2A per phase?
Answer
(1) Using A4899 and DM542 microsteppers, you can set max phase current, say 1.2A, for your NEMA17.
(2) So you can use high volt PSU as high as 36V, 2A, for your NEMA17 at 3.2V 1.2A /phase.
References
(1) Driving NEMA steppers using microstepper DM542 ... - EESE 2021apr22
(2) Fake microstepping in A4899 ... stepper-drivers? - EESE 2021apr14
(3) What could be the reasons for a stepper motor stuttering with an A4988 driver? - EESE 2021apr05 [Locked]
Appendices
Appendix A - A4899 driving NMEA stepper schematic