MODEL：LF77-EDG381-USBETH3-6AXIS
THIS is a 6 axis Mach3 USB+Ethernet dual interface board(EDG381) worked with Mach3.
Download: Installation Manual, Plugin, Schematic
Features:
Ethernet (using TCP/IP) or USB Full-speed connection.
100M Ethernet interface, built-in network transformer isolation, support long-distance wired connection. With the wireless router, the wireless connection between the PC (laptop) and the motion control board can be realized.
Up to 6 axes, 500kHz pulsing engine, which is suitable for the servo or stepping motor.Any axis can be configured as a Step/Dir Spindle.
Support slave axis (dual side motor drive: dual X/Y/Z), support home automatic leveling (dual side home switch).
2 real-time Manual Pulse Generation(MPG) input ports for 2 MPG at the same time. When the MACH3 MPG is set in the multi-step mode, it has the same real-time performance as the CNC machining center, smoothly. The control board has no delay and the mechanical system performance is fully utilized.
18 general-purpose input, with particular indicators, the input signal states can clearly shows.
8 general-purpose output, It can be configured as: spindle clockwise / CCW / Mist / Flood / VB script programming control.
PWM signal spindle control or Step/Dir signal spindle control.
2 analog input ports for adjusting the machining speed / jog speed / spindle speed.
Status indicator LED can be useful to show the USB/Ethernet connection, and working stauts by flashing.
6 high-speed optocouplers(Dual Channel) with 10MHz, 28 general optocouplers for isolating all of the input/output signals, this high-cost design can be provided high performance and stable system.
Fully supporting all Mach3 versions. Supporting Windows series, including Windows XP-Windows10(32bit/64bit).
No need to install any USB drivers, it can be used after plugging in the computer.
Easy firmware update.
Provide a complete installation manual, illustrated, detailed description.
Pluggable connector
100M Ethernet interface / USB interface / Isolated power supply
Ethernet cable connection
USB cable connection
6-axis output signal (direction signal + step signal):
10MHz high-speed optocoupler isolation x12 channel
Optocoupler isolation PWM spindle speed control signal output x1
/ optocoupler isolation universal output x8
Power Input / Optocoupler Isolated NPN Input x16
External Adjustment Knob
Motion control board and PC connection
USB cable connection
Ethernet cable directly connected
Ethernet cable through the Router
WLAN (Wireless LAN)
Download
Manual: Manual(EDG381) Ver1.1(ZIP/6.3M) 2021/8/2
Plugin: eMotionMach3(V2.0.0.6).zip(0.3M) 
2025/3/12
ChangeLog:
V2.0.0.6 Adjusting the phase will cause pulse output errors
V2.0.0.5 Fix Bug: MPG limit error.
V2.0.0.3 Fix Bug: M40, G31(Cycle Start is required each time);
“AxisLink” error limits the number of axes.
V2.0.0.0 Add: Slave Axis, Axis Link, Home Limit, Pulse(Step/Dir) Spindle
V1.3.1.2 Add function: “MPG Enable Button” automatically switch JOG mode. (For details, please refer to the Revisions List in the manual)
V1.3.1.1 Fix bug: G31 (for Auto Tool Zero, etc… ) cannot be executed correctly.
V1.3.0.1 Fix bug: The G code execution line number is incorrect after the RESET(urgency-stop)
V1.3.0.0 Fix bug: Ethernet connection is unstable
Previous(old) version manuals and plugins download
Schematic:
Schematic Preview:
I/O
MCU
Ethernet
POWER + Isolated Power
| Interface | USB / Ethernet(TCP/IP) |
| Axis output num | 6 Axis (high-speed optocouplers) |
| Axis output freq | 500KHz |
| Digital inputs | 18 (Optocoupler isolation): NPN*16 / PNP-5V *2 |
| Analog inputs | 0-3.3V * 2 (non-isolated) |
| MPG inputs | 2 (Optocoupler isolation): NPN*1 / PNP-5V *1 |
| Speed measurement input | 1 (Optocoupler isolation): PNP-5V *1 |
| Digital outputs | Open collector output 500mA *8 (Optocoupler isolation) |
| Analog output | PWM open collector output 10mA *1 (Optocoupler isolation) |
| Axis Backlash | NO |
| MPG(Manual Pulse Generator) | Real time |
| Slave Axis(Dual X/Y/Z) | YES |
| Automatic leveling(dual side home switch) | YES |
| Axis Link | YES |