Is it possible to use a A4988 stepper motor driver with a nema 11 stepper?
Couldn't find anything on the web.
Thanks!
Hi,
Can you please post a link t o specs/data of your stepper?
Nema 11 just tells us what the physical dimensions are.
Thanks.. Tom.. 
Hi,
Thanks for the link.
mechanical properties
| cogging torque (motor) | 0.004Nm | |
|---|---|---|
| holding torque (motor) | 0.12Nm |
electrical values
| nominal voltage | 24 - 48VDC | |
|---|---|---|
| rated current | 1A |
Tom... 
You should be able to use the A4988 stepper driver with that stepper motor. The A4899 is good for 1A coil current with no heat sink and will handle 8V to 35V motor power.
It is imperative that one set the coil current limit before connecting the motor. Set the current to less than or equal to the spec current (1A). To set the current limit you will need to know the value of the sense resistor on your A4988 driver board. Most Chinese clone boards that I have seen have 0.1 Ohm Rs values. Other values are 0.068 Ohms or 0.05 Ohms. Then enter the value of the resistor and the required coil current into the formula Vref = Imot x 8 x Rsen where Imot = the coil current and Rsen = the value of the sense resistor and Vref is the voltage to set. The Pololu A4988 page covers how to set the Vref but you must use the sense resistor value on YOUR board. Do not connect a motor while setting the current.
You can set the coil current to less than the max, of course, if the motor will perform satisfactorily. Doing so will let the motor and driver run cooler and extend their lives.
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