I am designing a peristaltic pump and need some advice for parts. I am using an Arduino Leonardo and also have an UNO and am planning on adding a temperature and pH sensor as well. I have two questions:
1) I am planning to use a Stepper Motor but am unsure if I should use the NEMA 17 or 23 or some other motor. I need a relatively "high" amount of torque maybe around 1 to 3 N-m.
2) Should I go with a Motor Shield or Motor Driver. I am currently looking at the Big Easy Driver or A4988 Bipolar Driver or the simple Arduino Motor Shield.
Does anyone know which of these would be best or have any suggestions? Thank you very much!