The A4988 stepper driver, originally made by Pololu, will interrupt the current to the motor for a little while if the it gets too hot. If you haven’t tuned your motor current at all, it may happen that the motor doesn’t move correctly an… See more

But first we need to find out the proper value of the current sensing resistor Rs as it’s exact value is dependent of the A4988 board manufacturer. By looking at the number marked on top of R5 you may use a tool such … See more

The step stick is such a a small board, this is both it’s strongest and weakest point. The small form factor makes it an smart choise for projects where overall bulk size matters but also makes it run hot as chilli. Some vend… See more

Let’s take a 1.5A motor which we want to run at 80% of its rating: Imax = 1.5 * 0.8 <=> Imax = 1.2A Let’s also take a generic step stick having the sensing resistor (Rs) value of 0.1 Ω, take the initial formula Vref = Imax * 8 * … See more