MODEL：LF77-AKZ250-USB3-NPN-3AXIS
MODEL：LF77-AKZ250-USB3-NPN-5AXIS
THIS is a 3/5 axis Mach3 USB interface board(NPN) worked with Mach3.
Download: Installation Manual, Plugin, Schematic
Features:
USB Full-speed connection.
Up to 5 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.
16 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 connection, and working stauts by flashing.
5 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.
Connector
USB interface
5-axis output signal (direction signal + step signal):
10MHz high-speed optocoupler isolation *10 channel
Optocoupler isolation PWM spindle speed control signal output *1
/ optocoupler isolation universal output *8
Optocoupler Isolated NPN Input *16 / Power Input
Power
USB cable connection
External Adjustment Knob
Motion control board and PC connection
USB cable connection
Download
Manual: NPN (AKZ250V3) Manual Ver1.1(ZIP/5.4M) 2021/8/2
Plugin: eMotionMach3(V2.0.0.5).zip(ZIP/0.3M) 
2022/4/9
ChangeLog:
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.
V1.3.0.2 Fix bug: The displayed value(RPM) of the speed measurement is twice as high as the actual speed.
V1.3.0.1 Fix bug: The G code execution line number is incorrect after the RESET(urgency-stop)
V1.2.1.0 Fix bug G31″Auto Tool Zero”
Previous(old) version manuals and plugins download
Schematic: sch_akz250-usb3-npn.zip (ZIP file/0.3M)
Schematic Preview:
IO
MCU
POWER
| Interface | USB |
| Axis output num | 3 or 5 Axis (high-speed optocouplers) |
| Axis output freq | 500KHz |
| Digital inputs | NPN*16 (Optocoupler isolation) |
| Analog inputs | 0-3.3V * 2 (non-isolated) |
| MPG inputs | NPN*2 (Optocoupler isolation) |
| Speed measurement input | NPN*1 (Optocoupler isolation) |
| 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 |