Ethernet CNC Motion Controller Ethernet SmoothStepper ESS Controller for Mach3 & Mach4 Upgrade from old parallel-port control to a dedicated Ethernet motion controller built for Mach3 and Mach4 CNC systems. The ESS handles motion control in dedicated hardware, then sends clean step-and-direction signals to your breakout board, motor drivers, relays, switches, and other CNC electronics. View Specs Add Easier Wiring with C25XP View ESS + C25XP Bundle Add DIN Rail Support 6 Axis Motion 4 MHz Max Pulse Rate 51 Total I/O Pins 3 Port Headers Who should buy the ESS? The Ethernet SmoothStepper is not the cheapest controller and it is not trying to be an all-in-one screw-terminal board. It is for builders who want a proven Ethernet motion-control architecture with breakout-board flexibility. Mach3 or Mach4 users Use the ESS when you want controller hardware that works with both Mach3 and Mach4 through the SmoothStepper plugin. Ethernet-control builds Ethernet gives you a cleaner modern control setup without depending on a legacy parallel-port computer. Breakout-board systems Best when you plan to pair the ESS with a breakout board such as the C25XP or other compatible CNC interface hardware. What the ESS does Mach3 or Mach4 plans the toolpath. The ESS receives motion commands from Mach and generates the step-and-direction pulse signals used by your motor drivers. Controls up to 6 CNC axes Generates high-quality pulse trains with very low jitter Uses Ethernet instead of a parallel port Provides three parallel-port-style 26-pin headers Works with stepper and compatible digital servo motor drivers What it does not do The ESS is a motion controller, not a complete CNC control box. It does not directly power motors It does not replace stepper or servo drivers It usually needs a breakout board or interface board It needs a regulated 5V power supply It does not directly drive analog or PWM servo drives Recommended setup: Pair the ESS with the C25XP Professional Wiring Add-On if you want screw terminals, integrated spindle-control features, safety monitoring, status LEDs, and cleaner panel wiring. Want the easier complete setup? The ESS is the motion controller, but most CNC builds also need a clean way to connect machine wiring. The ESS + C25XP bundle pairs this Ethernet SmoothStepper with the C25XP breakout board so you get Ethernet motion control plus screw-terminal wiring, relays, spindle-control features, safety monitoring, and status LEDs in one matched setup. View ESS + C25XP Bundle Add DIN Rail Support Recommended add-on: DIN Rail Support for Ethernet SmoothStepper ESS If you are mounting the ESS inside a CNC control cabinet or electrical enclosure, add the DIN rail support. It helps mount the Ethernet SmoothStepper neatly on DIN rail so the control box looks cleaner, stays more organized, and is easier to service later. This is a mechanical mounting accessory only. It does not add electrical features, screw terminals, relays, inputs, outputs, spindle control, or safety monitoring. View DIN Rail Support Key ESS specifications Motion and software SoftwareMach3 / Mach4 ConnectionEthernet Axis supportUp to 6 axes Pulse capabilityUp to 4 MHz Signal modesStep/Dir, Quadrature, CW/CCW I/O and wiring Total I/O51 pins Dedicated outputs20 pins Dedicated inputs15 pins Bidirectional I/O16 pins Connector style3 × 26-pin headers Official ESS setup resources, downloads, and plasma control files Use these official Warp9 and BuildYourCNC support resources to set up the Ethernet SmoothStepper ESS, download the required plugin and configuration software, review plasma control box wiring information, and access a ready XML configuration file for compatible C332S, C62, and ESS setups. ESS Getting Started Guide Plugin & Configuration Software Download Warp9 Support Forum Login Control Box for Plasma 1 PDF Download XML for C332S, C62 & ESS Prefer a Matched ESS + C25XP Bundle? These resources are provided to help with ESS installation, Mach3/Mach4 configuration, plasma control box setup, and compatible CNC controller wiring. Always verify that the selected XML, plugin, software version, and wiring match your exact machine, breakout board, drives, plasma system, and control cabinet layout before powering the system. ESS vs other controller options Use this comparison to choose the right controller architecture, not just the longest feature list. Use case Ethernet SmoothStepper ESS Mach3 USB Board PoKeys57CNC Best buyer Builder who wants Ethernet control with breakout-board flexibility Budget-focused Mach3 user with a simple machine Builder who wants the most built-in CNC features and expansion Software Mach3 / Mach4 Mach3 Mach3 / Mach4 Connection Ethernet USB USB / Ethernet Why choose it? Proven Ethernet motion control and parallel-port-style compatibility Lowest-cost simple Mach3 path Most expandable all-around controller Build it three ways ESS only Choose the ESS alone if you already have a compatible breakout board, wiring plan, power supply, and control cabinet layout. Current product ESS + C25XP bundle Best choice for most buyers building a Mach3 or Mach4 control box because it includes the motion controller and the professional wiring interface. View ESS + C25XP bundle Add DIN rail support Add this if you are mounting the ESS inside a DIN rail-based CNC control cabinet or electrical enclosure. View DIN rail support Common applications CNC routers Mills and lathes Plasma tables Laser tables Waterjet systems Drag knives and pipe benders Mach3 or Mach4 retrofit control boxes What to buy with it Regulated 5V power supply for the ESS Ethernet cable Breakout board or C25XP wiring add-on Stepper or compatible digital servo drivers Power supply for motor drivers Limit switches, E-stop, relays, and wiring as needed DIN rail support if mounting the ESS inside a control cabinet Professional Ethernet motion control for Mach3 and Mach4 Choose the ESS if you want a proven Ethernet controller, breakout-board flexibility, 6-axis capability, and 51 I/O pins for serious CNC control boxes. For the cleanest setup, pair it with the C25XP or choose the ESS + C25XP bundle. View ESS + C25XP Bundle Add DIN Rail Support Ask a Compatibility Question
