I've been looking through the Datasheet to the a4988 and I noticed that there is a Max voltage for v sense of 0.5V. Now I imagine this is for the sense resistors. I know the pololu board uses .05ohm sense resistors and they are 0805 package. These would be 1/4 watt resistors but at 0.5V through 0.05ohm resistors is that not a draw of 10amps?
I know that the current is limited through the driver but how is that calculated? How does the sense resistor go against ohms law (I know the draw here has to be less here since that resistor can't handle dissipating that much)?