Hi, is my first time dealing with motors and drivers, and I’ve already read some guides and questions to introduce myself and understand some theory, however, there’s some doubts that I have yet (maybe can be very basic for you):
I’m trying to understand how to set the Vref by this formula when I’m planning to use the 1/2nd or 1/4- 1/8- or 1/16-, -th microstep mode. I know that I’ve to calculate the final Vref multiplying the Vref of the formula by 0.7 as the Table 2: Step Sequencing Settings of the A4988 Datasheet says but what I’ve understood is that that factor (0.7) is for the full-step mode (maybe I’m wrong) and in my case I want to use the microsteps.
Imax=1.7A (from the Datasheet of my NEMA17)
Rs= 0.1 Ohm (R100)
Another doubt is that I currently have a Bipolar NEMA17 stepper motor with 1.7A/Phase, I know that the chip itself can handle up to 2A with sufficient additional cooling (that I will implement), considering that, do you recommend using the DRV8825? In that case, could you specify the calculation for the microstep mode too, please?
My application is the extrusion of a liquid with low viscosity, I think that it wouldn’t need to much torque so I can change the motor later but is what I’ve at the moment, but the microstep mode is very relevant (and learn how to set the Vref values in that mode).