Actually, i've thought about changing my pololus from 1/16 back to 1/8 steps. I guess that is still way too small to notice a difference, while on the other hand raising the microsteps gives a huge performance increase for the arduino.Quote
The DRV8825's can do a bit more current, and they support 1/32nd steps. The A4988's only support 1/16th steps.
Just a few numbers: atm, i've got 1/16 microstepping, that's in my case 100 steps per mm, so 1 (micro)step would be 0.01mm. That's incredibly small, i guess the cumulated backlash in the system is a lot more. Or do i have an error in my calculation?