TB6600 stepper motor Driver Controller 4.5A 8 - 50V TTL 16 Micro-Step CNC Single-Axis Based on the TB6600HG chip, the new BL-TB6600-V1.2 driver model replaces the popular BL-TB6560-V2.0 driver. This driver controller is suitable for building not only amateur CNC systems but also professional ones based on high power engines. Compared to the previous generation of the TB6560AHG, the output of the TB6600HG has increased to 200W (as we see a practical doubling in power value), the operating voltage is raised from 35V (TB6560AHG) to 50V, the operating current is increased to 4.5A (5A peak value). The maximum operating frequency has been increased.