The level of accuracy that you will achieve with a STEPCRAFT CNC is based a lot on how well the machine was assembled and how well it is maintained. If your machine is setup with a lot of movement in the gantry and lead screws, this will equate to less accuracy at the bit.   However if you take the time to not only setup and maintain the machine properly, but also take the time to do the software backlash compensation, then you can see accuracies of .001″ or better.   On average a customer can expect .0015″ – .003″ of accuracy in their machine.