ESS Smooth Stepper

When comparing the USS (USB SmoothStepper) to the ESS (Ethernet SmoothStepper), there are several key differences to consider. The ESS is compatible with both Mach3 and Mach4, though Mach4 is strongly recommended for new users, while the USS only works with Mach3 and should not be used for new builds. The ESS is recommended for all new installations. The USS can be powered directly via USB, but it requires a high-quality USB cable to ensure stable performance. Alternatively, the USS can use an external 5V power supply, while the ESS requires a 5V power supply for operation. The ESS features a larger FPGA, allowing it to support more features and easier design updates. It also includes a microcontroller for additional processing that the USS cannot handle. Another significant advantage of the ESS is its use of Ethernet, which electrically isolates the PC from CNC equipment, protecting against noise and voltage spikes. In contrast, the USS’s ground is directly connected to the PC, although USB isolators can be used to mitigate this. Additionally, there are differences in pin configurations between the two devices, with Port 2 on the USS and Ports 2 and 3 on the ESS functioning differently from Port 1. The ESS provides greater flexibility in configuring these pins as inputs or outputs. Overall, the ESS is the recommended choice for new CNC builds due to its enhanced capabilities and performance.