mamindz:
Two hours ago, I asked someone who has made a syringe pump a long time ago and he said A4988 would not be a good option for my stepper motor (I didn't ask the exact reason); Instead, he used TB6600 as a motor driver beside the Arduino Mega 2560 R3. But A4988 has a lower cost and I can provide both of them to check whether it can be a nice choice for my project.
If the A4988 can supply the current required by the motor it will work just as well as the TB6600.
The A4988 should work fine with motors that take less than about 1.3 to 1.5 amps. The TB6600 can provide up to 3 amps IIRC.
...R